CRAFTSMAN 247.775880 8.5 Horse Power Chipper Shredder Owner’s Manual

Owner’s Manual
CRAFTSMAN
8.5 Horse Power
CHIPPER-SHREDDER
Model No. 247.77588OSears, Roebuck and Co.,
Hoffman Estates, IL 60179, U.S.A.
770-1228A
Printed in U.S.A. (3/98)

CAUTION: Before using this product, read this manual and follow all Safety Rules and Operating Instructions.

WARRANTY INFORMATION

One-Year Warranty on Craftsman Chipper-Shredder
For one year from the date of purchase, whenthis Craftsmanchipper-shredderis maintained,lubricated,and tuned upaccordingto the operatingand maintenance instructionsinthe owner’smanual,Sears willrepair, free of charge, any defect in material orworkmanship.
This warrantyexcludes blades, chipperblades, flails, air cleaners, spark plugs, catcherbags and tires whichare expendable parts and become worn dudng normal use.
If this chipper-shredderis used for commercialor rental purposes, thiswarranty appliesfor only 30 days from the date of purchase.
WARRANTY SERVICE IS AVAILABLE BYCONTACTING THE NEAREST SEARS SERVICE CENTER INTHE UNITED STATES. THIS WARRANTY APPLIES ONLY WHILE THIS PRODUCT IS IN USE INTHE UNITED STATES.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Sears, Roebuck and Co., D/817WA, Hoffman Estates, II 60179

ACCESSORIES
These accessories were available when the chipper-shredder was purchased. They are also available at most Sears retail outlets, and service centers. Most Sears stores can order repair parts for you when you provide the model number of your Craftsman chipper-shredder.

PRODUCT SPECIFICATION

Model Number ………… 247.775880 ……………………..
Serial Number …………………………………………………..
Date of Purchase ………………………………………………
Record both serial number and date of purchase and keep in a safe place for future reference.

SAFE OPERATION PRACTICES

This symbol points out important safety instructions which, if not followed, could endanger the personal safety and/or property of yourself and others. Read and follow all instructions in this manual before attempting to operate your chipper shredder. Failure to comply with these instructions may result in personal injury.When you see this symbol-heed its warning.
DANGER:
Your chipper-shredder was built to be operated according to the rules for safe operation in this manual. As with any type of power equipment, carelessness or error on the pert of the operator can result in serious injury. If you violate any of these rules, you may cause serious injury to yourself or others.
WARNING: The Engine Exhaustfrom this product containschemicalsknownto the State of California to cause cancer, birthdefects orother reproductiveharm.

GENERAL OPERATION

• Read this owner’s guide carefully in its entirety before attempting to assemble this machine. Read, understand, and follow all instructions on the machine and in the manual(s) before operation. Be completely familiar with the controls and the proper use of the machine before operating it. Keep this manual in a safe place for future and regular reference and for ordering replacement parts.

• Your chipper-shredder is a powerful! tool, not a plaything. Therefore, exercise extreme caution at all times. Your unit has been designed to perform two jobs; to chip and shred vegetation found in a normal yard. Do not use it for any other purpose.

• Never allow children under age 16 to operate the unit. Children 16 years and older should only operate the unit under close parental supervision. Only responsible individuals who are familiar with these rules of safe operation should be allowed to use your unit.

• Keep the area of operation clear of all persons, particularly small children and pets. Stop the engine when they are in the vicinity of the unit. Keep work area clean and clear of branches or obstacles which could cause you to stumble or fall.

• When feeding material into this equipment, be extremely careful that pieces of metal, rocks, bottles, cans or other foreign objects are not included. Personal injury or damage to the machine could result.

• Always wear safety glasses or safety goggles, during operation and while performing an adjustment or repair, to protect eyes from foreign objects that may be thrown from the machine.

• Wear sturdy, rough-soled work shoes and close fitting slacks and shirt. Shirt and slacks that cover the arms and legs and steel-toed shoes are recommended. Do not wear loose fitting clothes or jewelry and secure hair SO itis above shoulder length. They can be caught in moving parts. Never operate a unit in bare feet, sandals or sneakers. Wear gloves when feeding material in the chipper chute or shredder hopper.

• Never place your hands, feet, or any part of your body into the shredder hopper, chipper chute, discharge opening, or near any moving part while the engine is running. Keep clear of the discharge opening at all times. If it becomes necessary to push material into the chipper chute or shredder hopper, use a small diameter stick, NOT YOUR HANDS.

• If itis necessary for any reason to unclog the feed intake or discharge openings or to inspect or repair any part of the machine where a moving part can come in contact with your body or clothing, stop the machine, allow it to cool, disconnect the spark plug wire from the Spark plug and move it away from the spark plug before attempting to unclog, inspect or repair.

• Do not operate unit while under the influence of alcohol or drugs.

• The machine should only be operated on a level Surface. Never operate your unit on a slippery, wet, muddy or icy surface. Keep your work area clean and clear of branches or obstacles which could cause you to stumble and fall. Do not overreach. Maintaining proper footing and balance is essential to preventing accidents.

• Do not allow an accumulation of processed material to build up in the discharge area as this will prevent proper discharge and can result in kick-back from the chipper chute.

• Keep your face and body back from chipper chute to avoid accidental bounce back of any material.

• Do not transport machine while engine is running.

• If the cutting mechanism strikes a foreign object or if your machine should start making an unusual noise or vibration, immediately stop the engine and allow the machine to come to a complete stop. Disconnect the spark plug wire and move it away from the spark plug.
  Take the following steps.
  a. Inspect for damage.
  b. Repair or replace any damaged parts.
  c. Check for any loose parts and tighten to assure continued safe operation.

• Never attempt to attach or remove catcher bag when engine is running. Shut the engine off and wait for the impeller to come to a complete stop. The impeller continues to rotate for a few seconds after the engine is shut off. Never place any part of the body in the impeller area until you are sure the impeller has stopped rotating.

• Muffler and engine become hot and can cause a burn. Do not touch.

• Do not allow leaves or other debris to build-up on engine’s muffler. The debris could ignite and cause a fire.

• Do not attempt to shred or chip material larger than specified in this manual. Personal injury or damage to the machine could result.

• Do not operate engine if air cleaner or cover over carburetor air-intake is removed, except for adjustment. Removal of such parts could create a fire hazard.

• Only use accessories approved for this machine by the manufacturer. Read, understand, and follow all instructions provided with the approved accessory.

• If situations occur which are not covered by this manual, use care and good judgment. Contact your dealer for assistance.

• Keep discharge chute deflector, chipper chute door, and all other guards and safety devices in place and operating properly.

• Only operate unit in good daylight. Do not operate unit at night or in dark areas where your vision may be impaired.

CHILDREN
Tragic accidents can occur if the operator is not alert to the presence of small children. Children are often attracted to the chipper-shredder and the chipping and shredding activity. Never assume that children will remain where you last saw them.

• Keep children out of the work area and under the watchful eye of a responsible adult other than the operator.
• Be alert and turn the unit off if a child enters the area.
• Never allow children under the age of 16 to operate the chipper-shredder.

SERVICE

• Use extreme care in handling gasoline and other fuels. They are extremely flammable and the vapors are explosive.
  a. Store fuel and oil in approved containers, away from heat and open flame, and out of the reach of children. Check and add fuel before starting the engine. Never remove gas cap or add fuel while the engine is running. Allow engine to cool at teast two minutes before refueling.
  b. Replace gasoline cap securely and wipe off any spilled gasoline before starting the engine as it may cause a fire or explosion.
  c. Extinguish all cigarettes, cigars, pipes and other sources of ignition.
  d. Never refuel unit indoors because flammable vapors will accumulate in the area.
  e. Never store the machine or fuel container inside where there is an open flame or spark such as a gas hot water heater, space heater, clothes dryer or furnace.

• Never run your machine in an enclosed area as the exhaust from the engine contains carbon monoxide, which is an odorless, tasteless and deadly poisonous gas.

• To reduce fire hazard, keep engine and muffler free of leaves, grass, and other debris build-up. Clean up fuel and oil spillage. Allow unit to cool at least 5 minutes before storing.

• Before cleaning, repairing, or inspecting, make certain the impeller and all moving parts have stopped. Disconnect the spark plug wire and keep wire away from spark plug to prevent accidental starting. Do not use flammable solutions to clean air filter.

• Check the blade and engine mounting screws at frequent intervals for proper tightness. Also visually inspect blades for wear and/or damage (e.g., bent, cracked). Replace with blades which meet original equipment specifications.

• Keep all nuts, bolts, and screws tight to be sure the equipment is in safe working condition.

• Never tamper with safety devices. Check their proper operation regularly.

• After striking a foreign object, immediately stop the engine, disconnect the spark plug wire from the spark plug, and thoroughly inspect the unit for any damage. Repair damage before starting and operating unit.

• Do not alter or tamper with the engine’s governor setting. The governor controls the maximum safe operating speed of the engine. Over-speeding the engine is dangerous and will cause damage to the engine and to other moving parts of the machine.

YOUR RESPONSIBILITY
Restrict the use of this power machine to persons who read, understand and follow the warnings and instructions in this manual and on the machine.

SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE

**** This unit is equipped with an internal combustion egine and should not be used on or near any unimproved forest-covered, brush-covered or grass- covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of Califomia the above is required by law (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest Sears Authorized Service Center (See the REPAIR PARTS section of this manual.)

ASSEMBLY

IMPORTANT: This unit is shipped without gasoline or oil in the engine. After assembly, see OPERATION section of this manual for proper fuel and engine oil fill-up.
NOTE: To determine right and left hand sides of your chipper-shredder, stand behind the unit with the engine farthest away from you.
Your chipper-shredder has been completely assembled at the factory, except for the hopper assembly, chipper chute, discharge chute and the catcher bag.
These parts are shipped loose in the carton. A pair of safety glasses and a bottle of oil are also included in the carton.
UNPACKING FROM CARTON

• Cut the comers of the carton.
• Remove all packing inserts.
• Remove all loose parts including owner’s manual. See figure 1.
• Roll chipper-shredder out of the carton.
• Make certain all parts and literature have been removed before the carton is discarded.

LOOSE PARTS
(Refer to figure 1.)
a. Hopper Assembly
b. Discharge Chute
c. Chipper Chute
d. Catcher Bag
e. Bottle of Oil
f. Safety Glasses
g. Owner’s Manual (not shown in figure 1)

TOOLS REQUIRED

1. 1/2″ or Adjustable Wrenches
2. 7/16″ or Adjustable Wrenches
3. 9/16” or Adjustable Wrenches
4. Funnel

DISCONNECTING SPARK PLUG

• Disconnect the spark plug wire and move it away from the spark plug before assembling the chipper-shredder. See figure 2.

ATTACHING DISCHARGE CHUTE

• Remove the wing knobs from each side of the discharge opening on the chipper-shredder. See figure 3.
• Using two 7/16” wrenches, remove hex lock nut, two spacers, and the hex bolt from top of the housing assembly. For easy assembly, do not remove the second spacer from the hex bolt.
• Place the discharge chute in position on the discharge opening. Insert hex bolt and spacer through hinge on discharge chute and housing (spacer fits inside of hinge). See figure 3 inset.
• Place second spacer over hex bolt inside the other part of the hinge. Secure with hex lock nut. Tighten securely.
• Secure both sides of discharge chute to housing using wing knobs that you earlier removed.
  Tighten wing knobs.

ATTACHING HOPPER ASSEMBLY

• Remove the 8-3/8” long hex bolt and the hex nut from the bottom of the inlet guide opening. See figure 4 inset.
• Place the hopper assembly on the ground and hold it in the position shown in step 1 in figure 4.
• Holding the hopper, push hopper pivot door down inside the hopper. See figure 4.
• Slide the hopper assembly towards the chipper-shredder housing so that the upper guide on the hopper assembly slides under the stop washer on each side of the inlet guide. See figure 4.
• Align the two holes (one on each side) of the lower hopper with the two holes (one on each side) of the inlet guide. See figure 4 inset.
• Insert the hex bolt (that you earlier removed) from the left through the hole on the hopper and the inlet guide. Insert the hex nut onto the bolt from the other side. See figure 4 inset.
• Tighten the bok till the lock nut is engaged. Make sure to remove sideplay from the bolt, but the hopper should be able to pivot.
• To raise the hopper, hold the hopper by the hand-hold ang lift it up till it clicks into position.
• To lower the hopper, hold the hopper by the hand-hold and pull the release bar. The hopper should drop down. See figure 5. The flap control rod is already attached to the hopper at the top. The other end of the rod has to be attached to the stop washer on the inlet guide. See figure 6.
• Raise the hopper till it clicks into position.
• Unscrew the shoulder bolt from the stop washer on the inlet guide. See figure 6.
• Align the foose end of the flap control rod with the stop washer on the inlet guide.
• Slide the shoulder bolt through the opening in the flap control rod. Secure tightly. See figure 6.

WARNING: This flap control rod is a safety device to hold the flap in place inside the hopper while shredding branches. Do not operate the chipper- shredder without property attaching this flap control rod to the unit.

• Do not remove these hardware from the inlet guide assembly while attaching the flap control rod.

ATTACHING THE CHIPPER CHUTE

• Your unit is shipped with one end of the brace already secured to the lower frame. Loosen the bolts securing the brace to the frame.
• Remove the three cupped washers and hex nuts from the weld studs beside the opening on the left side of the housing. See figure 7.
• Remove the two sets of hex bolt, lock nut, and flat washer from the two holes on the upper end of the brace as shown in figure 7.
• Place the chipper chute over the weld studs so the slot on the chute is towards the bottom. Align the three holes at the bottom of the chute with the three weld studs.
• Secure with the three pairs of cupped washers and hex nuts that you earlier removed. Do not tighten the nuts at this time. Make sure to place the cupped side of the washer against the chipper chute.
• Align the holes towards the front opening of the chute with the holes on the brace. See figure 7.
• Insert one each of the hex bolts, lock nuts, and flat washers (that you earlier removed) through each hole in the chute and the brace. Tighten these bolts to secure brace to the chute.
• Tighten bolts securing the brace to the lower frame. These bolts had been removed earlier.
• Tighten the three nuts on the weld studs.

ATTACHING THE CATCHER BAG
Your chipper-shredder is equipped with a catcher bag to catch the shredded material.

• To attach the bag, place the opening of the bag over the chute deflector and the chute flange.
  Make sure it completely covers the chute deflector.

• Depress the plunger on the drawstring, and pull on the drawstring until the bag is tight around the chute opening. Release plunger to lock it into position. See figure 8.

OPERATION

Read this owner’s manual and safety rules before operating your chipper- shredder. Compare the illustration in figure 9 with your chipper-shredder to familiarize yourself with the location of various controls and adjustments. Save this manual for future reference.
The operation of any chipper-shredder can result in foreign objects being thrown into the eyes, which can result in severe eye damage. Always wear safety glasses provided with the chipper-shredder before chipping or shredding, or while performing any adjustments or repairs.

OPERATING CONTROLS
(Refer to Figure 9.)
Release Bar
Used to release the hopper when raising or lowering.
Choke Lever
Used to enrich the fuel mixture in the carburetor when starting a cold engine.
Starter Handle
Used to manually start the engine.
Hopper Assembly
Allows leaves and small branches upto 1” diameter to be fed into the impeller for chipping and shredding. Lower the hopper to collect raked material for shredding.
Throttle Control
Regulates speed of the engine.
Chipper Chute
Allows bulky vegetation like stalks or heavy branches upto 3” diameter to be fed into the impeller for chipping and shredding.
Catcher Bag (not shown)
Used to collect the shredded material.
Rear Wheel Lock Lever
Used to lock the rear wheels from moving.
Stopping Engine
Move throttle control lever to STOP position.
Disconnect spark plug wire and move away from spark plug to prevent accidental starting.

MEETS ANSI SAFETY STANDARDS
Sears chipper-shredders conform to the safety standard B 71.6 -1990 of the American National Standards Institute.

WARNING: Before using your chipper- shredder, again refer to the safety rules on pages 3 and 4 of this manua!. Always be careful.
GAS AND OIL FILL-UP
Oil (Packed with unit) 

• Only use high quality detergent oil rated with API service classification SF, SG or SH. Select the oil’s viscosity grade according to your expected operating temperature. Follow the chart below.

NOTE: Although multi-viscosity oils (5W30, 10W30, etc.) improve starting in cold weather, these multtiviscosity oils will result in increased oil consumption when used above 32°F. Check the oil level more frequently to avoid possible engine damage from running low on oil.
Fill engine with oil as follows.

• Remove oil fill dipstick. See figure 10.
• With chipper-shredder on level ground, use a funnel to fill engine with oil to FULL mark on dipstick. Capacity is approximately 26 ounces.

Be careful not to overfill.

• Check oil level.
• Add oil if necessary. Replace dipstick and tighten.

NOTE: Do not overfill. Oil bottle packed with unit contains 26 oz. of oil.
Gasoline
WARNING: Experience indicates that alcohol blended fuels (called gasoho! or using ethanol or methanol) can attract moisture which leads to separation and formation of acids during storage. Acidic gas can damage the fuel system of an engine while in storage. To avoid engine problems, the fuel system should be emptied before storage for 30 days or longer. Drain the gas tank, start the engine and let it run until the fuel lines and carburetor are empty. Use fresh fuel next season. See STORAGE instructions for additional information. Never use engine or carburetor cleaner products in the fuel tank or permanent damage may occur.
Fill gas tank with gas as follows.

• Remove fuel cap. See figure 10.

• Make sure the container (from which you will pour the gasoline) is clean and free from rust or foreign particles. Never use gasoline that may be stale from long periods of storage in the container.

• Fill fuel tank with clean, fresh, lead-free automotive gasoline. DO NOT use Ethy! or high octane gasoline. See figure 10.

• Replace fuel cap.
  WARNING: Do not fill closer than 1/2 inch of top of fuel tank to prevent spills and to allow for fuel expansion. If gasoline is accidently spilled, move chipper-shredder away from area of spill. Avoid creating any source of ignition until gasoline vapors have disappeared.

• Check the fuel level periodically to avoid running out of gasoline while operating the chipper- shredder.

• If the unit runs out of gas as itis shredding or chipping, it may be necessary to unclog the unit before it can be restarted. Refer to “Removing the Flail Screen” instructions in SERVICE AND ADJUSTMENT section.

STARTING ENGINE
WARNING: Be sure no one other than the operator is standing near the chipper-shredder while starting or operating the unit. Do not operate this chipper-shredder unless the chute deflector has been properly installed and secured with hand knobs.
NOTE: To prevent the unit from sliding, place your foot firmly against the tire.

• Attach spark plug wire and rubber boot to spark piug. See figure 11.
• Place throttle in FAST position. See figure 11.
• Move choke lever to CHOKE position (in the direction of the arrow) as shown.
• If restarting a warm engine after a short shutdown, move choke lever to “No Choke” position.
• Grasp starter handle and pull rope out slowly until engine reaches start of compression cycle (rope will pull slightly harder at this point). Let the rope rewind slowly. Pull rope with a rapid full arm stroke. Let rope return to starter slowly. See figure 11.
• When engine starts, move choke lever to half choke position until engine runs smoothly and then to No Choke position.
• If engine fails to start after three pulls, move choke lever to No Choke position and pull starter rope again.
• If engine fires, but does not continue to run, move choke lever to Full Choke position and pull rope again.
• Move choke lever to OFF position as engine warms up.

NOTE: A noise will be heard when finding the start of the compression cycle. This noise is caused by the flails and fingers which are part of the shredding mechanism falling intoplace, and shouldbe expected./n addition,the flails and fingers will be noisyafter the engine is started, untilthe impeller reaches furl speed.

TOPPING ENGINE

• Move starter switch to OFF position.
• Disconnect spark plug wire and move away from spark plug to prevent accidental starting.

USING YOUR CHIPPER-SHREDDER
WARNING: Do not attempt to shred or chip any material other than vegetation found in a normal yard (i.e., branches, leaves, twigs, etc.).

• The chipper-shredder is designed for two different methods of operation.
  a. Leaves and small branches up to 1/2″ diameter (maximum) can be fed into the hopper assembly when it is in the raised or lowered position. See figure 12.
  b. Bulky material, such as stalks or heavy branches, up to 3”in diameter should be fed into the chipper chute. See figure 12.
  WARNING: Do not put material larger than is specified into the hopper, and/or into the chipper chute. Personal injury or damage to the machine could result.

• If it becomes necessary to push material into the chipper-shredder, use a small diameter stick — NOT YOUR HANDS. The stick should be small enough that it will be ground up if it gets into the impeller assembly.

LOWER THE HOPPER ASSEMBLY

• To lower the hopper assembly, use one hand to grasp the hand-hold at the top of the hopper assembly and lift slightly. See figure 5.
• Pull up on the release bar, and lower the hopper assembly to the ground. Release the bar. See figure 5.

WARNING: Never remove chute deflector till the unit has completely stopped. Never shut off the engine until all chipping is completed.
For best performance, it is important to keep the shredding blade and the chipper blades sharp. If the composition of the material being discharged changes (becomes stringy, etc.) or if the rate at which the material is discharged slows down considerably, it is likely that the shredding blade and/or chipper blades are dull and need to be sharpened or replaced. Refer to Service and Adjustments section.
IMPORTANT: There is a flail screen located inside the housing in the discharge area. If the flail screen becomes clogged, remove and clean as instructed in the Service and Adjustments section.
WARNING: The chipper-shredder discharges materials with considerable velocity. Keep away from the area around the discharge chute. Always stop the engine and disconnect spark plug wire when removing or attaching the bag, changing containers, or removing the shredded material. Wear safety glasses and gloves whenever using your chipper-shredder.

MAINTENANCE

GENERAL RECOMMENDATIONS

• Always observe safety rules when performing any maintenance.
• The warranty on this chipper shredder does not cover items that have been subjected to operator abuse or negligence. To receive full value from the warranty, operator must maintain the chipper- shredder as instructed in this manual.
• Some adjustments will need to be made periodically to maintain your unit properly.
• All adjustments in the Service and Adjustments section of this manual! should be checked at least once each season.
• Follow the maintenance schedule given below.
• Periodically check all fasteners and make sure these are tight.

WARNING: Always stop the engine and disconnect the spark plug wire before performing any maintenance or adjustments. Never remove discharge chute till the engine has completely stopped.

CLEANING

• Clean the chipper-shredder by running water
• from a hose through the hopper assembly and chipper chute with the engine running. Allow the chipper-shredder to dry thoroughly.
• Wash the bag periodically with water. Allow to dry thoroughly in the shade. Do not use heat.

ENGINE MAINTENANCE
Engine Oil

• Only use high quality detergent oil rated with API service classification SF, SG or SH. Select the oil’s viscosity grade according to your expected operating temperature. Refer to page 9 of this manual for viscosity chart.
• The four-cycle engine of your chipper-shredder will normally consume some oil. Therefore, check engine oil level regularly approximately every five hours of operation and before each usage.
• Stop engine and wait several minutes before checking oil level. With engine on level ground, the oil must be to FULL mark on dipstick.
• Change engine oil after the first five hours of operation, and every twenty-five hours thereafter.

CUSTOMER RESPONSIBILITIES

To Drain Oil
Drain oil while engine is warm. Follow the instructions given below.

• Remove oil drain plug. Catch oil in a suitable container.
• When engine is drained of all oil, replace drain plug securely.
• Refill with fresh oil. Refer to GAS AND OIL FILL-UP section.
• Replace dipstick.

Air Cleaner
The air cleaner prevents damaging dirt, dust, etc., from entering the carburetor and being forced into the engine and is important to engine life and performance. The air cleaner consists of a precleaner or foam filter, and a paper filter.
Never run the engine without air cleaner completely assembled.
To Service Air Cleaner:

1. Service pre-cleaner after every 25 hours of use, or at least once a season.
2. Service filter every 100 hours of use, or at least once a season.
3. Service pre-cleaner and filter more often under dusty conditions.

• Remove wing nut and cover.
• Slide pre-cleaner off filter. Clean the inside of base and cover thoroughly.
  . Clean pre-cleaner as follows: (See figure 13.)
  a. Wash in water and detergent solution, and squeeze (do not twist) until all dirtis removed.
  b. Rinse thoroughly in clear water.
  c. Wrap in aclean cloth and squeeze (do not twist) until completely dry, or allow to air dry.
  d. Saturate with engine oil and squeeze (don’t twist) to distribute oi! and remove excess oil.

NOTE: If the pre-cleaner is torn or damaged in any way, replace it.

• If necessary, replace paper filter (do not attempt to clean). Install new filter on base.
• Slide pre-cteaner over filter.
• Install cover and wing nut.
• Tighten wing nut securely.

Clean Engine

• Clean engine periodically. Remove dirt and debris with a cloth or brush.
• Frequently remove grass clippings, dirt and debris from cooling fins, air intake screen and levers and linkage. See figure 14. This will help ensure adequate cooling and correct engine speed.
• Yearly or every 25 hours, whichever occurs first, remove the blower housing and clean the areas shown in figure 14 to avoid overspeeding, overheating and engine damage. Clean more often if necessary.

NOTE: Cleaning with a forceful spray of water is not recommended as water could contaminate the fuel system.
WARNING: Temperature of muffler and nearby areas may exceed 150° F(65°C). Avoid these areas.
Spark Plug

• Clean the spark plug and reset the gap to .030″ at feast once a season or every 50 hours of operation. See figure 15. Spark plug replacement is recommended at the start of each season. Refer to engine parts list for correct spark plug type.

NOTE: Do not sandbiast spark plug. Spark plug should be cleaned by scraping or wire brushing and washing with a commercial solvent.
Muffler
WARNING: Do not operate the chipper- shredder without a muffler, or tamper with the exhaust system. Damaged mufflers or Spark arresters could create a fire hazard.

• Inspect periodically, and replace if necessary. If your engine is equipped with a spark arrester screen assembly, remove every 50 hours for cleaning and inspection. Replace if damaged.

WARNING: Always stop engine, disconnect spark plug wire, and move it away from spark plug before performing any adjustments or repairs.
LUBRICATION
Lubricate the pivot points on the release bar, hopper assembly, chute deflector and chipper chute once a season using a light oil. See figure 16

SERVICE & ADJUSTMENTS

REMOVING THE FLAIL SCREEN
If the discharge area becomes clogged, remove the flail screen and clean area as foliows.

• Stop engine, make certain the chipper- shredder has come to a complete stop and disconnect spark plug wire from the spark plug before unclogging the chute.
• Remove the two hand knobs on each side of the discharge chute (also called the chute deflector).
• Lift the discharge chute up, and keep it out of the way.
• Remove two hairpin clips from the clevis pins which extend through the housing. Remove the clevis pins. See figure 17.
• Pull the flail screen from inside the housing. See figure 17.
• Clean the screen by scraping or washing with water.
• Reinstall the screen.
• Put the discharge chute back to its original position and tighten the hand knobs.

NOTE: Be certain to reassemble the flail screen with the curved side down.

SHARPENING OR REPLACING THE BLADES
Chipper Blades

• Disconnect spark plug wire and move it away from spark plug.

• Remove the flail screen as instructed in previous section.

• Using a 1/2” wrench, remove the chipper chute by removing three hex nuts and washers. See figure 17.

• Using a 7/16” wrench, remove the brace (holding the chute to the frame) by removing the hex bolts.
  NOTE: When re-assembling, the cupped washer goes on the slot toward the bottom of the chipper chute with the cupped side against the chute.

• Rotate the impeller assembly by hand until you locate one of the two chipper blades in the chipper chute opening. Remove the blade, using a 3/16″ allen wrench on the outside of the blade and 1/2″ wrench on the impeller assembly (inside the housing). See figure 18.

• Remove the other blade in the same manner.

• Replace or sharpen blades.

• If sharpening, make certain to remove an equal amount from each blade.

• Reassemble in reverse order. Make certain blades are reassembled with the sharp edge facing the direction shown in figure 18 (sharp edge is assembled toward the slotted opening at the bottom).

• Torque bolts and nuts to 250-350 inch-pounds.

Shredding Blade
The shredding blade may be removed for sharpening or replacement as follows.

• Disconnect spark plug wire and move it away from spark plug.

• Lower the hopper assembly. Block up the housing. See figure 19.

• Remove the six hex lock nuts and lock washers from the housing weld bolts using a 1/2″ wrench. Separate the chipper-shredder into two halves.

• Remove the back-up plate.
  NOTE: When reassembling, make certain the embossed tab faces inward towards the impeller, and opening on the back-up plate is toward the bottom of the unit.

• Remove the two hand knobs and cupped washers which secure the chute deflector. Raise the chute defector.

• Insert a 1/2” or 3/4” diameter pipe through the flait screen into the impeller to keep it from turning, or remove the flail screen and insert a piece of wood (2 x 4) into the chute opening.

• Remove the two outside screws on the blade, using a 3/16″ allen wrench and a 1/2” wrench.

• Remove the blade by removing the center boit, lock washer and flat washer.
  WARNING: Use caution when removing the blade to avoid contacting the weld bolts on the housing.

• When sharpening the blade, follow the original angle of grind as a guide. It is extremely important that each cutting edge receives an equa! amount of grinding to prevent an unbalanced blade.

• An unbalanced blade will cause excessive vibration when rotating at high speeds and may cause damage to the unit. The blade can be tested for balance by balancing it on a round shaft screwdriver or nail. Remove metal from the heavy side until itis balanced evenly. See figure 20.

• When reassembling the blade, tighten center bolt to between 550 and 650 inch-pounds and the two outer boits to between 250and 350 inch- pounds, or lacking torque wrench, tighten securely.

ADJUSTING CARBURETOR
WARNING: If any adjustments are made to the engine while the engine is running (e.g. carburetor), keep clear of all moving parts. Be careful of heated surfaces and muffler. The carburetor has been pre-set at the factory and should not require adjustment. However, if your engine does not operate properly due to suspected carburetor problems, take your chipper-shredder to your nearest SEARS service center.
ENGINE SPEED
The engine speed on your chipper-shredder has been set at the factory. Do not attempt to increase engine speed or it may result in personal injury. If you believe the engine is running too fast or too slow, take your chipper- shredder to the nearest SEARS service center for repair and adjustment.
TIRES
Recommended operating tire pressure is 24 p.s.i. (sidewall of tire may give tire manufacturers recommended pressure). Equal tire pressure should be maintained on both tires.
WARNING: Excessive pressure when seating beads may cause tire/rim assembly to burst with force sufficient to cause serious injury.

OFF-SEASON STROAGE

Prepare your chipper-shredder for storage at the end of the season or if the unit will not be used for 30 days or more.
WARNING: Never store machine with fuel in the fuel tank inside of building where fumes may reach an open flame or spark, or where ignition sources are present such as hot water and space heaters, furnaces, clothes dryers, stoves, electric motors, etc.
A yearly check-up by your local Sears service center is a good way to make certain your chipper-shredder will provide maximum performance for the next season.

CHIPPER-SHREDDER

• Clean the chipper-shredder thoroughly.
• Wipe unit with an oiled rag to prevent rust (use a light oit or silicone).

ENGINE
IMPORTANT: itis important to prevent gum deposits from forming in essential fuel system parts such as carburetor, fuel filter, fuel hose, or tank during storage. Also, experience indicates that alcohol blended fuels (called gasohol or using ethanol or methanol) can attract moisture which leads to separation and formation of acids during storage. Acidic gas can damage the fuel system of an engine while in storage.

• Drain the fuel tank.

• Start the engine and let it run until the fuel lines and carburetor are empty.

• Drain carburetor by pressing upward on bowl drain which is located below the carburetor.

• Never use engine or carburetor cleaner products in the fuel tank or permanent damage may occur.

• Use fresh fuel next season.
  NOTE: Fuel stabilizer is an acceptable alternative in minimizing the formation of fuel gum deposits during storage.

• Add stabilizer to gasoline in fuel tank or storage container.

• Always follow the mix ratio found on stabilizer container.

• Run engine at least 10 minutes after adding Stabilizer to allow the stabilizer to reach the carburetor.

• Do not drain the gas tank and carburetor if using fuel stabilizer. Drain all the oil from the crankcase (this should be done after the engine has been operated and is still warm) and refill the crankcase with fresh oil.

• If you have drained the fuel tank, protect the inside of the engine as follows.

• Remove spark plug, pour approximately 1/2 ounce (approximately one tablespoon) of engine oil into cylinder and crank slowly to distribute oil.

• Replace spark plug.

OTHER

• Do not store gasoline from one season to another.
• Replace your gasoline can if your can starts to rust. Rust and/or dirt in your gasoline will cause problems. Store unit in a clean, dry area. Do not store next to corrosive materials, such as fertilizer.

NOTE: If storing in an unventilated or metal storage shed, be certain to rustproof the equipment by coating with a light oil or silicone.

TROUBLE-SHOOTING

2. Spark plug wire disconnected
3. Faulty spark plug
4. Throttle control not in correct position| 1. Fill tank with clean, fresh fuel
2. Connect wire to spark plug.
3. Clean, adjust gap or replace.
4. Move throttle control to FAST position
Loss of power; operation erratic| 1. Spark plug wire loose
2. Unit running on Choke
3. Blocked fuel line or stale fuel
4. Water or dirt in fuel system
5. Carburetor out of adjustment
6. Dirty air cleaner| 1. Connect and tighten spark plug wire
2. Move choke lever to OFF position
3. Clean fuel line; fill tank with clean, fresh gasoline.
4. Disconnect fuel line at carburetor to drain fuel tank. Refill with fresh fuel.
5. Contact your SEARS service center.
6. Service air cleaner.
Engine overheats| 1. Carburetor not adjusted properly
2. Engine oil level low| 1. Contact your SEARS service center
2. Fill crankcase with proper oil
Too much vibration| 1. Loose parts or damaged impeller| 1. Stop engine immediately and disconnect spark plug wire. Tighten all bolts and nuts. Make all necessary repairs. If vibration continues, have unit serviced by a SEARS service center.
Unit does not discharge| 1. Discharge chute clogged
2. Foreign object lodged in impeller| 1. Stop engine immediately and disconnect spark plug wire. clean flail screen and inside of blower housing.
2. Stop engine immediately and disconnect spark plug wire. Remove lodged object.
Rate of discharge slows considerably or composition of discharged material changes| 1. Shredding blade and/or chipping blade dull| 1. Sharpen or replace blade(s)

For repairs beyond the minor adjustments listed above, pleasecontact your nearest SEARS servicecenter.

PARTS LIST

SEARS CRAFTSMAN 8.5 H.P. CHIPPER-SHREDDER MODEL 247.775880

SEARS CRAFTSMAN 8.5 H.P. ENGINE MODEL 143.988503 FOR CHIPPER-SHREDDER MODEL 247.775880

Key No.| Part No| Description| Key No.| Part No| Description
---|---|---|---|---|---
—| —| RPM Low 1700| 149| 27882| Valve Spring Cap
—| —| RPM High 3450 to 3750| 149A| 35862| Valve Spring Cap
1| 35385| Cylinder (Incl. 2 & 20)| 150| 27881| Valve Spring
2| 27652| Dowel Pin| 151| 32581| Valve Spring Keeper
4| —| Oil Drain Extension| 169| 27896A| Breather Gasket
5| 30969| Extension Cap| 170| 28423| Breather Body
15| 30699C| Governor Rod (Incl. 15A & 15B)| 171| 28424| Breather Element
15A| 30700| Governor Yoke| 172| 28425| Valve Cover
15B| 650494| Screw, 6-40 x 5/16”| 173| 36675A| Breather Tube
16| 33454| Governor Lever| 173A| 32446| Breather Tube Grommet
17| 29916| Governor Lever Clamp| 174| 650128| Screw, 10-24 x 1/2”
18| 651028| Screw, Torx T-15, 8-32 x 3/8”| 178| 29752| Nut & Lock Washer
19| 34663| Speed Control Spring| 182| 30088A| Screw, 1/4-28 x 1”
20| 35319| Oil Seal| 184| 33263| Carburetor to Intake Pipe Gasket
25| 36460| Blower Housing Baffle| 185| 34707| Intake Pipe
26| 650561| Screw, 1/4-20 x 5/8”| 186| 34667| Governor Link
28| 30322| Lock Nut, 8-32| 200| 34677| Control Bracket (Incl. 19, 203 & 204)
30| 36283A| Crankshaft| 203| 31342| Compression Spring
35| 29826| Screw, 10-32 x 3/4”| 204| 651029| Screw, Torx T-10, 5-40 x 7/16”
36| 29918| Lock Washer| 206| 610973| Terminal
37| 29216| Lock Nut, 10-32| 207| 33878| Throttle Link
38| 29642| Retaining Ring| 209| 650821| Screw, 10-32 x 1/2”
40| 40011| Piston, Pin & Ring Set (std.)| 215| 35882| Control Knob
40| 40012| Piston, Pin & Ring Set (.010” os)| 223| 650378| Screw, Torx T-30, 5/16-18 x 1- 1/8
41| 40009| Piston & Pin Assembly (std.)| 224| 27915A| Intake Pipe Gasket
41| 40010| Piston & Pin Assembly (.010” os)| 238| 28820| Screw, 10-32 x 1/2”
42| 40013| Ring Set (std.)| 239| 27272A| Air Cleaner Gasket
42| 40014| Ring Set (.010″ os)| 240| 37104| Air Cleaner Bracket
43| 27888| Piston Pin Retaining Ring| 242| 33267| Air Cleaner Bracket
45| 36897| Connecting Rod Ass’y (incl. 47 & 49)| 245| 33268| Air Cleaner Filter
47| 651033| Connecting Rod Bolt| 245A| 35884| Air Cleaner Filter
48| 34034| Valve Lifter| 250| 33269A| Air Cleaner Cover
49| 36896| Oil Dipper| 251| 650513| Wing Nut, 1/4-20
50| 35375| Camshaft (MCR)| 260| 36250| Blower Housing
60| 33273A| Blower Housing Extension| 261| 650788| Screw, 5/16-18 x 3/4”
65| 650128| Screw, 10-24 x 1/2”| 262| 29747B| Screw, Torx T-40, 5/16-24 x 21/32”
69| 35262A| Cylinder Cover Gasket| 264A| 650802| Screw, 1/4-20 x 5/8”
70| 35376| Cylinder Cover (incl. 71, 75 & 80)| 265| 33272B| Cylinder Head cover
71| 35377| Crankshaft Bushing| 275| 341858| Muffler
72| 28582| Oil Drain Plug| 276| 31588| Locking Plate
75| 35319| Oil Seal| 277| 650729| Screw, 5/16-18 x 3-3/16”
80| 31845| Governor Shaft| 277A| 651036| Screw, 5/16-18 x 3-31/32”
81| 30590A| Washer| 278| 36908| Heat Shield Spacer
82| 35378| Governor Gear Ass’y.| 280| 36799A| Heat Shield
83| 30588A| Governor Spoot| 281| 33013| Starter Bubble Cover
84| 29193| Retaining Ring| 282| 650760| Screw, 8-32 x 3/8”
86| 650833| Screw, 1/4-20 x 1-3/16”| 285| 359858| Starter Cup
87| 650832| Screw, 1/4-20 x 1-11/16””| 287| 29752| Nut & Lock Washer
89| 32589| Flywheel Key| 290| 30962| Fuel Line
90| 611090| Flywheel| 292| 26460| Fuel Line Clamp
92| 650880| Lock Washer| 298| 650665| Screw, 1/4-15 x 3/4”
93| 650881| Flywheel Nut| 300| 34186A| Fuel Tank
100| 35135| Solid State Ignition| 301| 36246| Fuel Cap
101| 610118| Spark Plug Cover| 305| 35554| Oil Fill Tube
102| 651024| Solid State Mounting Stud| 307| 35499| O Ring
103| 651007| Screw, Torx T-15, 10-24 x 15/16”| 308| 35540| Fill Tube Clip
110| 35187| Ground Wire| 310| 36205| Dipstick
119| 36448| Cylinder Head Gasket| 325| 29443| Wire Clip
120| 36449| Cylinder Head| 327| 35392| Starter Plug
125| 27878A| Exhaust Valve (std.)| 339| 35880| Spacer
125| 27880A| Exhaust Valve (1/32” os)| 340| 34259| Fuel Tank Bracket
126| 34035| Intake Valve (std.)| 341| 34258A| Fuet Tank Bracket
126| 34036| Intake Valve (1/32” os)| 342| 30063| Screw, Torx T-30, 1/4-20 x 1/2”
127| 650691| Washer| 370G| 35274| Oil Instruction Decal
128| 650690| Belleville Washer| 370J| 35703| Throttle Decal
130| 6506944| Screw, 5/16-18 x 2”| 380| 640112| Carburetor (Incl. 184)
130A| 650273| Screw, 5/16-18 x 5/8″| 390| 590746| Rewind Starter
130B| 651031| Screw, 1/4-20 x 9/16”| 400| 36450B| Gasket Set
135| 33636| Resistor Spark Plug| 416| 34479A| Spark arrester Kit
139| 33369| Governor Gear Bracket| 900| —| Replacement Engine none
140| 650836| Screw, 10-24 x 1/2”| 900| —| Replacement SB 756321, Order 71-999

SEARS CRAFTSMAN 8.5 H.P. ENGINE MODEL 143.988503 FOR CHIPPER-SHREDDER MODEL 247.775880
Carburetor

SEARS CRAFTSMAN 8.5 H.P. ENGINE MODEL 143.988503 FOR CHIPPER-SHREDDER MODEL 247.775880
Recoil Starter 590746

Call 7 am – 7 pm, 7 days a week
1-800-366-PART
(1-800-366-7278)
---|---
| For in-home major brand repair service
Call 24 hours a day,7 days a week
1-8OO-4-REPAIR
(1-800-473-7247)
| For the location of a Sears Parts and Repair Center in your area
Call 24 hours a day,7 days a week
1-800-488-1222
| For information on purchasing a SearsMaintenance Agreement or to inquire about an existing Agreement
call 9 am – 5 pm, Monday-Saturd
1-800-827-6655

America’s Repair Specialists

Documents / Resources

| CRAFTSMAN 247.775880 8.5 Horse Power Chipper Shredder [pdf] Owner's Manual
247.775880 8.5 Horse Power Chipper Shredder, 247.775880, 8.5 Horse Power Chipper Shredder, Power Chipper Shredder, Chipper Shredder, Shredder
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References

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