HWH 625 Series Hydraulic Jack Control Owner’s Manual

HWH 625 Series Hydraulic Jack Control

CAUTION !

READ THE ENTIRE OPERATOR’S MANUAL BEFORE OPERATING. BLOCK FRAME AND TIRES SECURELY BEFORE CRAWLING UNDER VEHICLE. DO NOT USE LEVELING JACKS OR AIR SUSPENSION TO SUPPORT VEHICLE WHILE UNDER VEHICLE OR CHANGING TIRES. VEHICLE MAY DROP AND/OR MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH. KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE LEVELING SYSTEM AND ROOM EXTENSION ARE BEING OPERATED. NEVER PLACE HANDS OR OTHER PARTS OF THE BODY NEAR HYDRAULIC LEAKS. OIL MAY PENETRATE SKIN CAUSING INJURY OR DEATH.

HOW TO OBTAIN WARRANTY SERVICE

THIS IS NOT TO BE INTERPRETED AS A STATEMENT OF WARRANTY HWH CORPORATION strives to maintain the highest level of customer satisfaction. Therefore, if you discover a defect or problem, please do the following:

WEAR SAFETY GLASSES WHEN INSPECTING OR SERVICING THE SYSTEM TO PROTECT EYES FROM DIRT, METAL CHIPS, OIL LEAKS, ETC. FOLLOW ALL OTHER APPLICABLE SHOP SAFETY PRACTICES.

IMPORTANT: IF COACH IS EQUIPPED WITH A ROOM EXTENSION, READ ROOM EXTENSION SECTION BEFORE OPERATING LEVELING SYSTEM

FIRST: Notify the dealership where you purchased the vehicle or had the leveling system installed. Dealership management people are in the best position to resolve the problem quickly. If the dealer has difficulty solving the problem, he should immediately contact the Customer Service Department, at HWH CORPORATION.

SECOND: If your dealer cannot or will not solve the problem, notify the Customer Service Department: HWH CORPORATION 2096 Moscow Rd. Moscow IA. 52760 563-724-3396 OR 800-321-3494. Give your name and address, coach manufacturer and model year, date the coach was purchased, or the date of system installation description of the problem, and where you can be reached during business hours (8:00 a.m. till 5:00 p.m. c.s.t.).

HWH CORPORATION personnel will contact you to determine whether or not your claim is valid. If it is, HWH CORPORATION will authorize repair or replacement of the defective part, either by appointment at the factory or by the authorization of an independent service facility, to be determined by HWH CORPORATION. All warranty repairs must be performed by an independent service facility authorized by HWH CORPORATION, or at the HWH CORPORATION factory, unless prior written approval has been obtained from proper HWH CORPORATION personnel.

CONTROL IDENTIFICATION

CONTROL FUNCTIONS

CONTROL BUTTONS

• “ON” BUTTON : Push this button any time to start the auto stabilize function
• “STORE” BUTTON : This button will retract both jacks at the same time
• “OFF” BUTTON : This button turns off control power to the stabilizing system
• EXTEND BUTTONS (UP ARROWS) : These buttons will extend their respective jack to lift the vehicle
• RETRACT BUTTONS (DOWN ARROWS) : These buttons will retract their respective jack to lower the vehicle.

INDICATOR LIGHTS

• POWER ON LIGHT : This light indicates the system is active
• STORE INDICATOR LIGHT : This light will be on when the system is in the store mode
• “JACK DOWN” : These lights are functional only when the ignition is in the “ON” or “ACC” position, and the jacks are extended 1/4 to 1/2 inch
• MASTER “JACKS DOWN” WARNING LIGHT : This is a light mounted in the dash seperate from the touch panel. If eqquipped, it will be on when any one or more jacks are extended and the ignition is in the “ON” position and the park brake is off

OPERATING PROCEDURES

GENERAL INSTRUCTIONS

Maintain adequate clearance in all directions for vehicle, room extensions, awnings, doors, steps, etc. Vehicle may move in any direction due to jacks extending or retracting, settling of the jacks or the vehicle, equipment malfunction, etc..
If parking on soft ground or asphalt paving, a wood block or pad should be placed under each jack.
Press the “OFF” button or turn the ignition switch “OFF” at any time to stop the operation of the system
Any time a hydraulic stabilizing process is interrupted, retract the jacks according to the JACK RETRACTION Section and then restart the stabilizing process If the hand / auto brake is not set when the “ON” button is pressed, the system will not function. The manual UP and DOWN arrows will not work. The stabilizing system should be cycled once a month or whenever the vehicle is used, to keep the system in operating condition.

CAUTION: DO NOT MOVE THE VEHICLE IF ONE OR MORE JACKS ARE EXTENDED TO THE GROUND

PREPARATION FOR TRAVEL

If the jacks are retracted but a red “WARNING” light is lit the system needs to be serviced. Any room extension or generator slide should be fully retracted before traveling.
CAUTION: DO NOT MOVE THE VEHICLE WHILE THE JACKS ARE STILL IN CONTACT WITH THE GROUND OR IN THE EXTEND POSITION. THIS VEHICLE IS EQUIPPED WITH STRAIGHT-ACTING JACKS. MOVING THE VEHICLE WITH THE JACKS EXTENDED CAN CAUSE SEVERE DAMAGE TO THE JACKS AND OR THE VEHICLE AND CREATE A DRIVING HAZARD.

DO NOT RELY SOLELY UPON WARNING LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY TO CHECK THAT ALL JACKS ARE FULLY RETRACTED INTO THE STORE/TRAVEL POSITION.
If the jacks cannot be retracted according to the JACK RETRACTION Section, retract the jacks according to the MANUAL JACK RETRACTION Section. The system should then be checked.
NOTE: If the vehicle is parked or stored with the jacks extended for an extended period of time and the jacks fail to retract completely, extend the jacks back down to the ground then retract the jacks again

625 SERIES LEVELING SYSTEM

AUTOMATIC HYDRAULIC STABILIZING

1. Place transmission in the recommended position for parking the vehicle and set parking brake. Turn the coach engine off. Turn the ignition to the “ACCESSORY”

2. At this time, the operator may want to check the jacks and place a pad under each jack if the ground will not support the vehicle

3. Press the “ON” button one time. The ON light will start to flash
   IMPORTANT: During the Automatic Stabilizing procedures, pushing the “ON”, “STORE” or the “OFF” button on the HWH touch panel will stop the automatic stabilizing function.

4. The system will automatically extend the jacks to stabilize the vehicle. After the system has finished stabilizing, it will automatically shut off.

5. Turn the ignition switch to the “OFF” position

JACK RETRACTION

CAUTION: THE OPERATOR MUST BE SURE THAT THERE ARE NO OBJECTS UNDER THE VEHICLE AND THAT ALL PEOPLE ARE CLEAR OF THE VEHICLE.

NOTE: When the jacks are stored with the ignition in the ON position, the warning buzzer will sound until the jacks have retracted to the STORE position. If desired, the jacks can be stored with the ignition key in the accessory position. This will eliminate the warning buzzer while the jacks are retracting. ****

1. Press the “STORE” button. The store indicator

light will flash. As each jack retracts, its red WARNING light will go out. The system will automatically shut down six minutes after the individual red “WARNING” lights go out. If any one red “WARNING” light does not go out, the system will continue to store for thirty minutes, then shut down regardless of the “WARNING” light condition.
NOTE: When traveling thermal expansion may cause a jack to extend slightly. When the “STORE” button has been used to retract the jacks, the system will automatically retract any jack that extends due to thermal expansion.
IMPORTANT: If power to the system is interrupted after starting a store procedure, the store procedure should be reinitiated and the jacks should be completely retracted with all red WARNING lights out prior to traveling.
IMPORTANT: During the Automatic Store procedures, pushing the “ON”, “STORE” or the “OFF” button on the HWH touch panel will stop the automatic store function .
CAUTION: DO NOT MOVE THE VEHICLE WHILE THE LEVELING JACKS ARE STILL IN CONTACT WITH THE GROUND OR IN THE EXTEND POSITION. THIS VEHICLE IS EQUIPPED WITH STRAIGHT-ACTING JACKS. MOVING THE VEHICLE WITH THE LEVELING JACKS EXTENDED CAN CAUSE SEVERE DAMAGE TO THE JACKS AND OR THE THE VEHICLE AND CREATE A DRIVING HAZARD. DO NOT RELY SOLELY UPON WARNING LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY TO CHECK THAT ALL JACKS ARE FULLY RETRACTED INTO THE STORE/TRAVEL POSITION.

2. The vehicle can be moved as soon as the red warning lights are out and the jacks are in the STORE/TRAVEL position.
   IMPORTANT: If a red warning light and buzzer come on while traveling, the jacks should be checked as soon as a safe parking location is found.

3. If jacks cannot be retracted by the above procedure see MANUAL JACK RETRACTION Section

MANUAL HYDRAULIC OPERATION

1. Place transmission in the recommended position for parking the vehicle, and set the parking brake. Turn the ignition to the “ACCESSORY” position.

2. Place pads under the jack feet if the ground will not support the vehicle on the

3. The vehicle may be stabilized using the manual EXTEND (UP ARROW) buttons on the right half of the panel. Push and hold an UP ARROW to extend a jack to the ground. Jacks used to stabilize the vehicle should lift the vehicle slightly after touching the ground
   IMPORTANT: Do not continue to push an EXTEND button for more than ten (10) seconds after a jack is fully extended.

4. When stabilizing turn the ignition switch to the “OFF”

MANUAL  JACK RETRACTION

CAUTION: KEEP AWAY FROM THE WHEELS, DO NOT CRAWL UNDER THE VEHICLE, KEEP A SAFE DISTANCE IN FRONT AND REAR OF THE VEHICLE. THE VEHICLE MAY DROP AND/OR MOVE FORWARD OR BACKWARD WITHOUT WARNING AS THE VALVE RELEASE IS OPERATED.
IMPORTANT: HWH recommends that all HWH room extensions are fully retracted prior to performing manual jack retraction procedures. Use the manual valve release for retracting the jacks only if the STORE feature on the HWH control panel will not retract the jacks

1. Locate your power unit-manifold assembly. (The diagram below represents a typical Power Unit- Manifold Assembly it may not be an exact match to yours)
   NOTE: Multiple manifolds may be present on the power unit. The upper most manifold should control jack functions. (Valve styles and arrangements will vary)

2. Allow clearance for the vehicle to

3. Using the diagram below identify the style of your two center
   NOTE: As of APRIL 2002 a 1/4″ Nut Driver has been incorporated into the Breather Cap. Before using read and understand the last page of this manual
   Large style with T-Handle valve release: The T-Handle will turn several turns easily. As the valve starts to open, the T-Handle will turn harder. Make sure the valves have been opened far enough to allow the jacks to retract.
   Small style with Valve Release Nut: DO NOT turn the 1/4″ valve release nut more than 4 and 1/2 turns. Turning the nut more could damage the valve.
   Large style with Valve Release Nut: The 1/4″ Valve release nut is located under a plastic plug that must be removed to gain access. DO NOT turn the 1/4″ valve release nut more than 1 full turn. Turning the nut more could damage the valve

4. Retract the front jacks by opening the two center valves. Slowly turn the manual valve releases counter clockwise until the jacks start to retract

5. Repeat the process by identifying then opening the two outer valves, if

6. Check that all jacks are now retracted. If yes, continue. If no, notify the dealership where you purchased the vehicle or had the leveling system installed or contact HWH Corporation customer service. IMPORTANT: Once the manual valve release is snug, DO NOT tighten the manual valve release past this point as internal damage may occur to the solenoid. The system should now be repaired before using again

7. Close the valves by turning each valve release

MAINTENANCE

OIL LEVEL

All maintenance should be done as part of the normal servicing of the coach.
The oil level should be checked when the vehicle is first purchased and then once every two years. More often if there is an oil leak in the system.
All jacks and any HWH room extension cylinders should be completely retracted before checking the oil level. The oil reservoir is part of the pump/manifold assembly. The oil level is checked and filled through the breather cap. Clear any dirt away from the breather/filler cap before removing. The oil level should be within one inch of the top of the reservoir. Most breather caps have a dipstick.
NOTE: Overfilling the tank can cause leakage of oil through the breather cap.
FLUID: HWH Specialty Hydraulic Oil is recommended. In an emergency Dexron automatic transmission fluid can be used.
NOTE: Dexron automatic transmission fluid contains red dye and can cause staining should a leak occur. DO NOT USE brake fluid or hydraulic jack fluid. Use of these can damage seals.

ELECTRICAL SYSTEM
The batteries should be in good condition and fully charged. Weak batteries can cause erratic operation. Battery cable terminals and battery posts and connections should be kept clean.
All electrical connections, especially ground connections, should be clean, tight, free from corrosion and protected from weathering

JACKS
There are very few user serviceable parts on the jacks The jacks require very little maintenance. If the jacks are extremely dirty with caked on mud they should be washed. The jack rods should NOT be wiped and do not need to be oiled or sprayed with anything.

ROOM EXTENSIONS
The HWH room mechanisms need no maintenance. DO NOT grease or lubricate any parts of the HWH mechanism. Any visible mechanism can be kept clean by washing with water. Refer to the vehicle manufacturer for correct maintenance of the room seals.

VISUAL INSPECTION
Periodically inspect the system for oil leaks and damaged or missing parts, such as pivot bolts or springs. Check the hydraulic lines and wiring for damage and wear. Check that the jacks do not interfere with any parts of the vehicle when they are in the “STORE” position.
The jacks should be cycled at least once a month or whenever the coach is serviced. The system will operate better if kept clean and free from caked on mud or ice.

OPERATIONAL CHECK
Review the OPERATOR MANUAL. Run the system according to the SYSTEM OPERATION Section. Note any abnormal operation.
Check that all lights work according to the “INDICATOR LIGHT” Section. Correct function of the red “WARNING” light is important. Review the “JACK RETRACTION” Section. Make sure the jacks will fully retract to the “STORE” position. Jacks should not interfere with any of the coach when in the “STORE” position

NOT IN PARK/BRAKE CHECK
CAUTION: WHEN MAKING THIS CHECK, BLOCKTHE COACH WHEELS SECURELY SO THE COACH CANNOT ROLL FORWARD OR BACKWARD.
Set the park/brake. Switch the ignition to the “ACC” or “ON” position. Push the “ON” switch. Release the parking brake. The ON light should go out and the jacks should stop extending. If the panel does not shut off, the system needs to be serviced. Retract the jacks and switch the ignition to “OFF”.
If any of the above checks or inspections reveal a problemor if there are other problems or questions, consult a qualified RV repair center, your vehicle or coach manufacturer, or HWH CORPORATION for service or repair

BREATHER CAP – DIPSTICK – 1/4″ NUT DRIVER

IMPORTANT: PRIOR TO REMOVING THE BREATHER CAP, EITHER TO CHECK THE OIL LEVEL OR TO USE THE 1/4″ NUT DRIVER, CLEAN ANY DEBRIS FROM THE TOP OF THE RESERVOIR. BEFORE RETURNING THE BREATHER CAP TO THE RESERVOIR, REMOVE ANY PAINT CHIPS OR OTHER DEBRIS FROM THE DIPSTICK INCLUDING DEBRIS INSIDE THE 1/4″ NUT DRIVER.

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