NAKAYAMA 025276 Petrol Sprayer Instruction Manual
- June 9, 2024
- NAKAYAMA
Table of Contents
NAKAYAMA 025276 Petrol Sprayer
SAFETY WARNINGS
caution: To Ensure Safe Operation Never operate the machine when tired, ill or under the influence of alcohol or other substances, to avoid causing damage or serious injury.
Persons who operate this engine should be familiar with the instructions, properly trained and experienced in how to use the machine. Persons who are not qualified to operate this engine are strictly forbidden from using it.
For the safety of yourself and bystanders, pay close attention to the following:
- During operation of the engine, exhaust gases are produced which contain CO and CH (keeping content within standards). To avoid accidents, the engine should not be used indoors. In case there is a need to operate indoors, a ventilation system should be used and the exhaust should be located at least 1m away from the doors and windows of the room.
- Your work area should have adequate ventilation. High heat sources should be located at least 10 metres from the engine.
- Do not place flammable, explosive and any other hazardous substances and materials near the engine to avoid the risk of fire.
- The engine and exhaust system may become very hot during operation and remain hot for a while after the engine has stopped. Contact with hot engine components may cause injuries as well as ignite some materials and substances.
- Do not start the engine without first having filled with oil and fuel, to avoid damage.
- Always switch the engine off when filling up with fuel and/or lubricants.
- Place the machine on a flat surface and carry out oil changes while the engine is warm.
- Smoking is strictly prohibited when filling of fuel and lubricants. Do not allow the fuel and lubricant to overflow. If fuel or oil overflows or drips, clean carefully before starting the engine.
- Keep fuel away from children.
CAUTION! Frequent and chronic contact with gasoline can cause skin cancer. After each time you come into contact with gasoline, wash your hands with soap and water as soon as possible.
Disposal: Protect the environment when disposing of used fuel. Do not dispose with household waste, in the ground or down the drain. Deliver any chemicals to special recycling centres in a sealed container.
Introduction
Please read this manual carefully before attempting to use the machine.
This machine’s engine features a soft start system, substantial power output
and low running noise and vibration levels. The engine is a single cylinder,
four-stroke, air-cooled, OHV25° inclined engine with electronic ignition. It
is of small size, light weight and durable design. Since the product is
constantly improving, this gasoline engine might be subject to modifications
and improvements without prior notice. If this gasoline engine is resold, this
manual should be considered a standard part of the finished product and
accompany the machine accordingly.
Caution: Read this manual carefully before operating the machine. Always
strictly follow the instructions to avoid causing damage and/or accidents.
Application range
The general gasoline engine, as a power source, can be used in combination
with generators, water pumps, small diggers, garden machinery e.t.c. except
for automotive applications.
DESCRIPTION OF MAIN PARTS (A)
- Fuel Tank
- High Temperature label
- Oil Dipstick
- Crankshaft
- Muffler
- Air Cleaner
- Fuel Tank Cover
- Cylinder Head Cover
- Carburettor
- Starter Comp
- Starter Grip
TECHNICAL DATA
TECHNICAL DATA
POWER| 6,5hp
OUTPUT| 36lt/min
PRESSURE| 15-30bar
TANK| 160lt
REEL/ HOSE| 30m
INCLUDES| INFLATING WHEELS
- The manufacturer reserves the right to make minor changes to product design and technical specifications without prior notice unless these changes significantly affect the performance and safety of the products. The parts described/illustrated in the pages of the manual that you hold in your hands may also concern other models of the manufacturer’s product line with similar features and may not be included in the product you just acquired.
- To ensure the safety and reliability of the product and the warranty validity, all repair, inspection, repair or replacement work, including maintenance and special adjustments, must only be carried out by technicians of the authorize d service department of the manufacturer.
- Always use the product with the supplied equipment. Operation of the product with non-provided equipment may cause malfunctions or even serious injury or death. The manufacturer and the importer shall not be liable for injuries and damages resulting from the use of non-conforming equipment.
INSTRUCTIONS
Before Operating
IMPORTANT: The engine is delivered with no oil, please fill with engine oil!
Checking the engine oil level (Images B, B1)
Unscrew the oil dipstick to check to check that the engine oil level is within
the limits. IIf the oil level is too low, fill engine oil from the filler hole
to the specified level. The recommended engine oil type is SAE 10W-. 30. The
recommended type of engine oil is directly related to the ambient temperature.
Checking the fuel level (Image C) Open the fuel tank cap and check the fuel level. If the level is too low, add fuel through the filler hole until the level reaches the red indicator inside the tank. The recommended fuel type is unleaded petrol. Do not mix gasoline with engine oil. Do not use gasoline containing dirt residues or other foreign parties.
Checking the air filter (Image D)
The air cleaner system has two types of filters, dry case and dipped. Check
that the filter is clean and the sponge should be free of dust.
When first using the oil bath air cleaner, fill with clean machine oil up to the
specified marking line on the outer case. Check the safety and warning label
before you start.
Starting the Engine (Image E, F, G)
- a. Turn on the power switch, turn off the choke, set the throttle valve to proper position and first pull the starting handle lightly until you feel a slight resistance, then pull forcefully to start the engine.
- b. After starting, allow the engine run for 1-3 minutes at idle speed and check that the engine is runnning smoothly and steadily and there are no abnormal noise. Then turn the choke up to maximum and adjust the throttle so that the engine gains the required speed.
Stopping the engine (Image G1)
During engine operation, maintain a safe distance from the muffler and and
stay out of its emission range. Check the engine’s operating status. In case
of abnormal sound, grate vibration etc. stop the engine immediately.
caution: Emergency engine shutdown: Turn the power switch to OFF position or pull out the spark plug directly. Normal engine shutdown: First remove load, let the engine idle run for 2-3 minutes, then turn the power switch to the OFF position.
- Do not stop the machine without first removing the load under normal conditions.
KEY SETTINGS (Images H, I, J)
Each engine has been strictly tested and inspected. The machine can run under normal conditions without extra adjustment. After several hours of operation, make adjustments to the engine following the procedure below if necessary:
- A. Adjusting the valve gap Intake valve gap: 0.10 – 0.15mm. Exhaust valve gap: 0.15 – 0.20mm.
- Stabilize the valve gap adjustment nut and release the valve lock nut.
- Turn the valve gap adjustment nut to create the proper gap.
- Stabilize the valve gap adjustment nut and screw on the valve lock nut. Torque: 10N.m. (1.0kg.m)
- After rescrewing the valve lock nut, check the valve gap again.
- B. Adjust the speed control governor (large and small spring, throttle hinge and adjusting lever)
- Remove the fuel tank.
- Unscrew the lock nut and move the hinge to fully open the valve.
- After moving the throttle support and opening the valve, move the regulator lever in the same direction to the farthest position it can reach and screw on the nut.
- Check that the throttle bracket and valve move smoothly.
- Reinstall the fuel tank.
- Notes on unpacking
Carefully check the contents of the original packaging and make sure there is nothing missing. If you have any questions about the operation of the machine, consult your local dealer or call the company’s service center directly. Do not disassemble the engine while it is within the warranty period.
MAINTENANCE (Image K)
Everyday maintenance
- A. C heck the air filter and remove dirt and debris.
- B. Check the fastening nuts and make sure they are tight.
- C. Check the engine oil level and make sure it is within limits.
After 25 hours of operation, the air filter should be cleaned. After 50 hours of operation, the spark plug should be checked, cleaned of debris and the gap adjusted to 0.7-0.8 mm if necessary. Check the cooling fins and remove any dirt between them.
Replacing of engine oil: Unscrew the drain plug, tilt the engine slightly and drain the oil out, add kerosene for cleaning and then drain it out, finally tighten the drain plug and fill with clean unused oil to the specified level.
After every 100 hours of operation, the fuel tank and filter must be cleaned. Open the fuel tank cap, remove the filter and clean it using a brush. Remove the fuel tank, clean the inside of the tank and remove any debris and water that is inside the tank. Reinstall the tank and filter, then refill with clean fuel to the specified level.
After every 2 years, check the condition of the oil tubes. If there is any hardening, cracking or other sign of damage, they should be replaced. Tighten the replaced oil tube connections securely and check for any leaks.
Maintenance before storage for a longer period
If the engine will not be used for a long period of time, maintenance should
be carried out before storing it:
- Α. Remove the fuel tank, drain all fuel and clean from any dirt residue or water inside. Open the fuel valve, unscrew the drain plug located at the bottom of the carburetor, drain out the fuel thoroughly, then screw the drain plug back into its original position.
- B. Unscrew the drain plug located at the bottom of the crankcase and drain all the lubricating oil, then tighten the drain plug.
- C. Clean the outer surface of the engine with a clean cotton cloth, remove any dirt, dust residue, etc., then store the engine in a clean and dry area with adequate ventilation.
- D. Turn the crankshaft until the piston comes up against the top dead center position to prevent air from entering the cylinder.
Discard of used oil
Please use a suitable container to collect any used oil and deliver it to a
special recycling center. Do not dispose of oil down the drain, on the ground
or with household waste.
TRANSPORTATION AND STORAGE
Be extra careful with the engine when loading and unloading, place it in an
upright position and on an even floor. Take the necessary measures to prevent
impact and damage during transportation. The engine must be stored in a clean,
moisture-free and waterproof place with adequate ventilation.
In case you are going to store the engine for a long time, drain the fuel
completely from the engine, as well as the air filter oil.
TROUBLESHOOTING
| Problem | Cause | Solution |
|---|---|---|
| No spark at the spark plug. | Spark Plug | Combustion residues in the spark |
plug.
Spark plug gap too large or too small. Spark plug insulation worn out.
| Clean deposit.
Adjust gap to 0.7-0.8mm. Replace spark plug.
Other| Problem with the ignition system. Reduced performance of
the flywheel.| Replace igniter. Replace flywheel.
The spark plug is working properly and creates a spark.| Compression is
right.| Excessive amount of fuel in the cylinder.
Small amount of fuel in the cylinder, there are residues or water.
| Screw out spark plug, dry and screw in.
Renew fuel.
When unscrewing the drain plug of the carburettor, no fuel flows out.| The pin
valve is clogged.| Wash or replace carburettor.
Good oil supply but low compression.| Worn piston spring.
Spark plug not screwed in properly. Leakage in the cylinder head, incorrect valve gap or wrong timing
| Replace. Screw in tight
Clean, reinstall or re-adjust.
The ignition and fuel supply do not exhibit any problem.| Problem with the spark plug.
Short circuit or other problem in the operating switch.
Low oil level warning system not working properly.
| Switch off the engine and fix the problem.
Switch off. Replace.
| Problem | Cause | Solution |
|---|---|---|
| Reduced efficiency of power and speed. | Choke not open. |
Muffler ventilation blocked. Moving parts worn out.
Problem with the automatic speed governor. Low ignition efficiency.
Valve gap too wide.
Combustion residues in the cylinder.
| Open the choke. Replace the muffler. Check or replace.
Adjust the speed governor.
Replace the spark plug or the flywheel. Adjust the gap.
Clean the cylinder.
Large variation in speed.| Problem with the automatic speed governor.
The type of carburetor is not suitable for the machine. Incorrect setting of the gap.
| Adjust the speed governor. Replace the carburettor. Adjust the gap.
Speed too high.| Problem with the governor slider.| Correctly adjust or
reposition the slider.
Abnormal sound.| Incorrect adjustment of the valve gap. The camshaft gear is
damaged.| Adjust the valve gap. Replace the camshaft.
Carburetor leakage.| Pin valve stuck.| Lightly tap or clean carburettor.
O-Ring deformed.| Replace.
PUMP (Images L, M, N)
Operating instructions
- Check all connectors and other connection points.
- Align pulleys and adjust belt tension.
- Each tube joint must be tightened securely to prevent leakage.
- Before starting the engine, close the valve. Untighten the pressure adjusting screw and pull the pressure regulator upwards.
- Start the engine so that the sprayer is powered, set the speed to the appropriate level. Push the pressure regulator down. Maintain the pressure between 21-35 Kgs through the pressure adjustment screw.
- Open the valve to start spraying.
- After the end of spraying, pull the pressure regulator upwards and run the sprayer with fresh water to clean up any chemical residue.
Lubrication
- Replace the engine oil after the first 10 hours of operation, then after 50 hours of operation and then every 70 hours of operation.
- Remove used oil by unscrewing the drain plug.
- After the drain plug is screwed in, remove the oil inlet cap and refill with new #30-40 engine oil.
- Maintain the oil level at 2/3 of the oil sight glass.
- Regularly replenish grease lubrication points. Screw in the grease cups 2-3 cycles every 2 hours of spraying.
Troubleshooting
A. Power supply failure & pressure instability
- Check if the suction hose is blocked or leaking.
- Open the valve to release the air.
- Remove the suction chamber and water outlet chamber and check if the valve is stuck or damaged.
Β. Leakage from the head
- Remove the protection cover and screw on the adjusting rings.
- If the problem persists, replace the cylinder sealing components.
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