HWH 625 Series User manual

OPERATOR’S MANUAL
ML38734/MP04.2523
05MAR07
Touch Panel Control
Hydraulic Stabilizing
FEATURING:
HWH CORPORATION
(On I-80, Exit 267 South)
2096 Moscow Road | Moscow, Iowa 52760
Ph: 800/321-3494 (or) 563/724-3396 | Fax: [phone]
www.hwh.com
625 SERIES STABILIZING SYSTEM
HWH TOUCH PANEL-CONTROLLED
Two Straight-Acting Jacks
AP38733
R
CORPORATION
W
HH
R
CAUTION!
HWH HYDRAULIC JACK CONTROL
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
STORE
OFF
ON
R
JACK DOWN
PARK BRAKE MUST
BE SET TO OPERATE

OPERATING MANUAL
MP14.0004
05MAR07
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 OPER-
ATED.
NEVER PLACE HANDS OR OTHER PARTS OF THE BODY NEAR HYDRAULIC LEAKS. OIL MAY PENETRATE SKIN
CAUSING INJURY OR DEATH.
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.
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:
[phone] OR [phone]. Give your name and
coach was purchased, or the date of system installation,
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.
If your dealer cannot or will not solve the problem,
notify the Customer Service Department:
HWH CORPORATION 2096 Moscow Rd. Moscow IA. 52760
address, coach manufacturer and model year, date the
SECOND:
FIRST:
authorization of an independent service facility, to be
defective part, either by appointment at the factory or by the
CORPORATION will authorize repair or replacement of the
determine whether or not your claim is valid. If it is, HWH
HWH CORPORATION personnel will contact you to
during business hours (8:00 a.m. till 5:00 p.m. c.s.t.).
description of the problem, and where you can be reached
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 FUNCTIONS
auto stabilize function.
stabilizing system.
CONTROL IDENTIFICATION
"ON"
"OFF"
POWER ON
Light
CONTROL BUTTONS INDICATOR LIGHTS
"STORE"
RIGHT SIDE
EXTEND
the same time.
extend their respective jack to lift the vehicle.
MP24.2851
05MAR07
will retract their respective jack to lower the vehicle.
LEFT SIDE EXTEND
POWER ON LIGHT :
"JACK DOWN" :
"ON" BUTTON :
"OFF" BUTTON :
"STORE" BUTTON :
EXTEND BUTTONS (UP ARROWS) :
RETRACT BUTTONS (DOWN ARROWS) :
Push this button any time to start the
This button turns off control power to the
This button will retract both jacks at
These buttons will
These buttons
This light indicates the system is
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.
This is a
STORE
Indicator Light
STORE INDICATOR LIGHT : This light will be on when the
system is in the store mode.
OFF
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
CAUTION!
STORE
ON
Button
Button
Button
Button
Button
HWH HYDRAULIC JACK CONTROL
R
BE SET TO OPERATE
JACK DOWN
PARK BRAKE MUST
RIGHT SIDE
RETRACT
Button
LEFT SIDE RETRACT
Button
active.
Indicator light
JACK DOWN
(2) red
MASTER "JACKS DOWN" WARNING LIGHT :
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
MP34.0204
05MAR07
GENERAL INSTRUCTIONS
PREPARATION FOR TRAVEL
If parking on soft ground or asphalt paving, a wood block or
pad should be placed under each jack.
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.
If the jacks are retracted but a red "WARNING" light is lit
the system needs to be serviced. 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.
CAN CAUSE SEVERE DAMAGE TO THE JACKS AND OR
MOVING THE VEHICLE WITH THE JACKS EXTENDED
VEHICLE IS EQUIPPED WITH STRAIGHT-ACTING JACKS.
THE GROUND OR IN THE EXTEND POSITION. THIS
WHILE THE JACKS ARE STILL IN CONTACT WITH
DO NOT MOVE THE VEHICLECAUTION:
The stabilizing system should be cycled once a month or
whenever the vehicle is used, to keep the system in
operating condition.
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..
Any room extension or generator slide should be fully
DO NOT MOVE THE VEHICLE IF ONE
OR MORE JACKS ARE EXTENDED TO THE GROUND.
CAUTION:
retracted before traveling.
THE VEHICLE AND CREATE A DRIVING HAZARD.
DO NOT RELY SOLELY UPON WARNING LIGHTS.
Press the "OFF" button or turn the ignition switch "OFF"
at any time to stop the operation of the system.
fail to retract completely, extend the jacks back down
to the ground then retract the jacks again.
NOTE: If the vehicle is parked or stored with the jacks
extended for an extended period of time and the jacks
IT IS THE OPERATOR’S RESPONSIBILITY TO CHECK
THAT ALL JACKS ARE FULLY RETRACTED
INTO THE STORE/TRAVEL POSITION.

MP34.2705
05MAR07
OPERATING PROCEDURES
625 SERIES LEVELING SYSTEM
AUTOMATIC HYDRAULIC STABILIZING
will stop the automatic stabilizing function.
"OFF" button on the HWH touch panel
procedures, pushing the "ON", "STORE" or the
IMPORTANT: During the Automatic Stabilizing
The ON light will start to flash.
3. Press the "ON" button one time.
and place a pad under each jack if the ground will not
2. At this time, the operator may want to check the jacks
engine off. Turn the ignition to the "ACCESSORY" position.
parking the vehicle and set parking brake. Turn the coach
1. Place transmission in the recommended position for
support the vehicle.
5. Turn the ignition switch to the "OFF" position.
The system will automatically extend the jacks to
stabilize the vehicle. After the system has finished
stabilizing, it will automatically shut off.
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
a safe parking location is found.
while traveling, the jacks should be checked as soon as
see MANUAL JACK RETRACTION Section.
3. If jacks cannot be retracted by the above procedure

OPERATING PROCEDURES
MP34.3004
05MAR07
IMPORTANT: Do not continue to push an EXTEND
MANUAL HYDRAULIC OPERATION
1. Place transmission in the recommended position for parking
2. Place pads under the jack feet if the ground will not support
the vehicle on the jacks.
3. The vehicle may be stabilized using the manual EXTEND
(UP ARROW) buttons on the right half of the panel. Push
button for more than ten (10) seconds after a jack is
4. When stabilizing turn the ignition switch to
the "OFF" position.
the vehicle, and set the parking brake. Turn the ignition to the
"ACCESSORY" position. fully extended.
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.

OPERATING PROCEDURES
MP34.3302
07MAR07
MANUAL JACK RETRACTION
been opened far enough to allow the jacks to retract.
the T-Handle will turn harder. Make sure the valves have
will turn several turns easily. As the valve starts to open,
Large style with T-Handle valve release:
power unit. The upper most manifold should control
NOTE: Multiple manifolds may be present on the
retract the jacks.
if the STORE feature on the HWH control panel will not
Use the manual valve release for retracting the jacks only
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.
1. Locate your power unit-manifold assembly.
2. Allow clearance for the vehicle to lower.
CAUTION:KEEP AWAY FROM THE WHEELS,
point as internal damage may occur to the solenoid.
incorporated into the Breather Cap. Before using read
NOTE: As of APRIL 2002 a 1/4" Nut Driver has been
and understand the last page of this manual.
6. Check that all jacks are now retracted. If yes, continue.
7. Close the valves by turning each valve release clockwise.
DO NOT tighten the manual valve release past this
IMPORTANT: Once the manual valve release is snug,
8. The system should now be repaired before using again.
3. Using the diagram below identify the style
5. Repeat the process by identifying then opening
the two outer valves, if applicable.
LARGE STYLE
WITH T-HANDLE
VALVE RELEASE
SMALL STYLE
WITH VALVE
RELEASE NUT
LARGE STYLE
RELEASE NUT
WITH VALVE
PLASTIC PLUG
BREATHER
CAP
Small style with Valve Release Nut: DO NOT
1/4" valve release nut more than . Turning
the nut more could damage the valve.
release nut is located under a plastic plug that must be
removed to gain access.
could damage the valve.
Large style with Valve Release Nut:
The T-Handle
The 1/4" Valve
turn the
DO NOT turn the 1/4" valve
release nut more than . Turning the nut more
jack functions. (Valve styles and arrangements will vary)
POWER UNIT-MANIFOLD ASSEMBLY
MANIFOLD
of your two center valves.
If no, notify the dealership where you purchased the vehicle
or had the leveling system installed or contact
(The diagram below represents a typical Power Unit-
MANUAL JACK RETRACTION
extensions are fully retracted prior to performing
IMPORTANT: HWH recommends that all HWH room
manual jack retraction procedures.
Manifold Assembly it may not be an exact match to yours).
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.
1 full turn
4 and 1/2 turns
HWH Corporation customer service.

MAINTENANCE
MP44.0000
13FEB07
OIL LEVEL
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
Most breather caps have a dipstick.
NOTE: Overfilling the tank can cause leakage of oil
through the breather cap.
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
All electrical connections, especially ground connections,
should be clean, tight, free from corrosion and protected
JACKS
There are very few user serviceable parts on the jacks
The jacks require very little maintenance. If the jacks are
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
Check that all lights work according to the "INDICATOR
LIGHT" Section. Correct function of the red "WARNING"
Review the OPERATOR MANUAL. Run the system
according to the SYSTEM OPERATION Section.
Note any abnormal operation.
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"
All maintenance should be done as part of the normal
servicing of the coach.
is checked and filled through the breather cap. Clear any dirt
clean. from weathering.
light is important.
position.
FLUID: HWH Specialty Hydraulic Oil is recommended. In an
brake fluid or hydraulic jack fluid. Use of these can damage
and can cause staining should a leak occur. DO NOT USE
Dexron automatic transmission fluid contains red dye
emergency Dexron automatic transmission fluid can be used.
seals.
NOTE:
away from the breather/filler cap before removing. The oil
level should be within one inch of the top of the reservoir.
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.

MAINTENANCE
NOT IN PARK/BRAKE CHECK
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
THE COACH WHEELS SECURELY SO THE COACH
CANNOT ROLL FORWARD OR BACKWARD.
CAUTION: WHEN MAKING THIS CHECK, BLOCK If any of the above checks or inspections reveal a problem
or 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.
07MAR07
MP44.0500
ignition to "OFF".

BREATHER CAP - DIPSTICK - 1/4" NUT DRIVER
MP84.9999
07FEB07
VALVE RELEASE
NUT 1 1/2" DIAMETER
SOLENOID VALVE
NOTE: DO NOT turn the valve
release nut more than 4 and 1/2
(four and one half) turns counter
clockwise. Damage to the valve
may result.
OIL LEVEL
BREATHER CAP
OIL LEVEL GROOVES
1/4" NUT DRIVER
NOTE: THE BREATHER CAP IS LOCATED
ON THE TOP SIDE OF THE POWER UNIT RESERVOIR.
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.
INCLUDING DEBRIS INSIDE THE 1/4" NUT DRIVER.
REMOVE ANY PAINT CHIPS OR OTHER DEBRIS FROM THE DIPSTICK
BEFORE RETURNING THE BREATHER CAP TO THE RESERVOIR,
VALVE RELEASE
NUT
to the valve may result.
turn counter clockwise. Damage
NOTE: DO NOT turn the valve
release nut more than 1 full
PLASTIC PLUG
REMOVE TO
GAIN ACCESS
TO THE 1/4"
VALVE RELEASE
NUT
SOLENOID VALVE
2 1/4" DIAMETER