HWH 325 SERIES User manual

OPERATOR’S MANUAL
ML34256/MP05.3237
06JAN05
Touch Panel Leveling Control
BI-AXIS Hydraulic Leveling
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
325 SERIES LEVELING SYSTEM
HWH TOUCH PANEL-CONTROLLED
R
Straight-Acting Jacks
AP34255
W
CORPORATION
HH
R
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
HWH HYDRAULIC LEVELING
CAUTION!
OFF
STORE
LEVEL
R
Multiple Room Extensions

CAUTION !
READ THE ENTIRE OPERATOR’S MANUAL BEFORE OPERATING.
MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.
CAUSING INJURY OR DEATH.
CHIPS, OIL LEAKS, ETC. FOLLOW ALL OTHER APPLICABLE SHOP SAFETY PRACTICES.
OPERATOR’S MANUAL
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
NEVER PLACE HANDS OR OTHER PARTS OF THE BODY NEAR HYDRAULIC LEAKS. OIL MAY PENATRATE SKIN
WEAR SAFETY GLASSES WHEN INSPECTING OR SERVICING THE SYSTEM TO PROTECT EYES FROM DIRT, METAL
MP15.04
30MAY01
KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE LEVELING SYSTEM AND ROOM EXTENSION ARE BEING OPERATED.
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
leveling system.
CONTROL IDENTIFICATION
LEVEL MODE LIGHT
WARNING LIGHTS (4-Red)
CONTROL BUTTONS INDICATOR LIGHTS
FRONT EXTEND BUTTON
FRONT RETRACT BUTTON
RIGHT SIDE RETRACT BUTTON
RIGHT SIDE EXTEND BUTTON
(The panel must be off before pressing the "STORE" button)
extend their respective jack pairs to lift the vehicle.
LEFT SIDE EXTEND
REAR EXTEND BUTTON
REAR RETRACT BUTTON
LEFT SIDE RETRACT
LEVEL MODE LIGHT:"LEVEL" BUTTON:
"OFF" BUTTON:
"STORE" BUTTON:
EXTEND BUTTONS (UP ARROWS):
RETRACT BUTTONS (DOWN ARROWS):
These buttons will
This light indicates the system is in
STORE LIGHT
STORE LIGHT:
the store mode.
WARNING BUZZER:
BUTTON
"LEVEL" BUTTON
"OFF" BUTTON
"STORE" BUTTON
BUTTON
This button places the system in
leveling mode.
This button turns off control power to the
This button will retract all four jacks.
will retract their respective jack pairs to lower the vehicle.
extended approximately 1/2 inch or more and the ignition
This light will be on when the system is in
A buzzer will sound if a jack is
These buttons
switch is in the "ON" position.
HWH HYDRAULIC LEVELING
CAUTION!
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
OFF
STORE
LEVEL
the leveling mode.
more jacks are extended approximately 1/2 inch and the
master "JACKS DOWN" light which will be on when one or
position. Some vehicles are equipped with a dash mounted
1/2 inch, provided the ignition is in the "ACC" or "ON"
ever the corresponding jack is extended approximately
A red WARNING light will be on when-
ignition is in the "ON" position.
WARNING LIGHTS:
LEVEL LIGHTS (4-Yellow)
If a yellow LEVELING light is on, that
two yellow LEVELING lights can be on at a time. The vehicle
the appropriate jack pairs to put out the yellow light. One or
indicates a side, corner, or end of the vehicle is low. Extend
is level when all yellow lights are out.
LEVELING LIGHTS:
MP25.270G
25APR03

CONTROL FUNCTIONS
CONTROL IDENTIFICATION
MP25.9405
30JAN97
CORPORATION
H
CAUTION!
CLEAR OF ROOM WHEN OPERATING.
UNDERSTAND OPERATOR’S MANUAL BEFORE
USING. KEEP PEOPLE AND OBSTRUCTIONS
HYDRAULIC ROOM EXTENSION
OFF
ON
RETRACT
H
W
R
EXTEND ROOM CONTROL
SWITCH
KEY SWITCH
The KEY SWITCH controls power to the ROOM
CONTROL SWITCH. When the KEY SWITCH is in the "ON"
POSITION the room can be operated, and the key cannot be
removed. When the KEY SWITCH is in the "OFF" position
the room cannot be operated, and the key can be removed.
The ROOM CONTROL SWITCH
is a two position momentary switch. Pressing the switch in
the EXTEND POSITION will extend the room. Pressing the
switch in the RETRACT POSITION will retract the room. Re-
leasing the ROOM CONTROL SWITCH will halt the operation
of the room.
ROOM OPERATOR’S PANEL
KEY
KEY SWITCH: ROOM CONTROL SWITCH:

OPERATING PROCEDURES
MP35.381C
13MAY04
GENERAL INSTRUCTIONS
PREPARATION FOR TRAVEL
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.
If the hand / auto brake is not set when the "I" button
is pressed, the "NOT IN PARK/BRAKE" light will come on.
When the "I" button is released the "NOT IN PARK/
Before traveling, the red jack warning lights must be off.
If lights are not correct for travel, retract jack as described
in the JACK RETRACTION Section.
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.
TO CHECK THAT ALL JACKS ARE FULLY RETRACTED
LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY
HAZARD. DO NOT RELY SOLELY UPON WARNING
AND OR THE VEHICLE AND CREATE A DRIVING
EXTENDED CAN CAUSE SEVER DAMAGE TO THE JACKS
MOVING THE VEHICLE WITH THE LEVELING JACKS
VEHICLE IS EQUIPPED WITH STRAIGHT-ACTING JACKS.
THE GROUND OR IN THE EXTEND POSITION. THIS
THE LEVELING JACKS ARE STILL IN CONTACT WITH
DO NOT MOVE THE VEHICLE WHILECAUTION:
The leveling 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:
INTO THE STORE/TRAVEL POSITION AND THE
VEHICLE IS AT THE PROPER RIDE HEIGHT FOR
BRAKE" light will go out. The panel will NOT turn on.
TRAVELING. CONTACT MANUFACTURER TECHNICAL
retracted before traveling.
IMPORTANT: Any time the "I" button has been
pushed, push the "STORE" button before traveling.
SERVICE BEFORE MOVING A VEHICLE THAT IS NOT
AT PROPER TRAVEL HEIGHT.

MP35.382C
13MAY04
CAUTION:
IMPORTANT: Pushing the "OFF" button or turning the
JACK RETRACTION
THE OPERATOR MUST BE SURE THAT
THERE ARE NO OBJECTS UNDER THE VEHICLE AND THAT
ALL PEOPLE ARE CLEAR OF THE VEHICLE.
ignition key will stop the STORE procedure. Any time
the STORE procedure is stopped before all 4 red Warning
4. If jacks cannot be retracted by the above procedure see
MANUAL JACK RETRACTION Section.
JACK POSITIONS
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 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
Lights go out, the jacks should be completely retracted
EXTEND POSITION STORE/TRAVEL POSITION
3. The vehicle can be moved as soon as the red warning
lights are out and the jacks are in the STORE/TRAVEL
position.
THE STORE/TRAVEL POSITION AND THE VEHICLE IS AT
THE PROPER RIDE HEIGHT.
1. Turn the ignition to "ON" or "ACC".
OPERATING PROCEDURES
325 SERIES LEVELING SYSTEM
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.
by pushing the "STORE" button before traveling.
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.
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.
2. 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 two minutes
after the four individual red "WARNING" lights are 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" lights condition.
time. Extend jack pairs accordingly until all yellow lights are out.
LEVELING PROCEDURE
extended until the park brake is set.
One or two yellow LEVEL lights can be on at one
IF NEEDED BEFORE LEVELING THE VEHICLE FRONT
ALWAYS LEVEL THE VEHICLE FROM SIDE TO SIDE
according to a lit yellow light.
low. Push an EXTEND (up arrow) button to extend jack pairs
5. A lit yellow LEVEL light indicates that end, side or corner is
4. Place a pad under each jack, if needed, at this time.
TO REAR.
power but the pump will not run. The jacks can not be
NOTE: If the park brake is not set the panel will have
2. Turn ignition switch to "ACCESSORY".
The POWER ON light will come ON.
3. Push the "ON" button on the touch panel.
brake and block tires securely.
1. Place gear selector in the parking position, apply park
extend any remaining jacks. Do not use the right or left
month or whenever the vehicle is used, to keep the
NOTE: The leveling system should be cycled once a
7. Push the "OFF" button on the Touch Panel.
system in operating condition.
8. Turn the ignition switch off.
EXTEND buttons.
pushing the front and/or rear EXTEND buttons as needed to
stability against wind and activity in the vehicle. Do this by
slightly after touching the ground. This provides additional
jacks used to stabilize the vehicle should lift the vehicle
may be extended until they touch the ground. The remaining
6. After the vehicle is level, the jacks not used for leveling
not have enough stroke to level the vehicle.
NOTE: If the ground is too uneven, the jacks may
The vehicle may have to be moved.

OPERATING PROCEDURES
MANUAL JACK RETRACTION
4. Repeat the process for the rear jacks by opening the two
outer valves.
4 and 1/2 turns. Turning the nuts more could damage
the jacks. DO NOT turn valve release nuts more than
IMPORTANT: Only open the valves enough to retract
until the jacks start to retract.
Slowly turn the manual valve releases counter clockwise
3. Retract the front jacks by opening the two center valves.
2. Allow clearance for the vehicle to lower.
The solenoid valves are located on the power unit/valve
1. Locate the manual valve release on each solenoid valve.
RELEASE IS OPERATED.
OR BACKWARD WITHOUT WARNING AS THE VALVE
THE VEHICLE MAY DROP AND/OR MOVE FORWARD
DISTANCE IN FRONT AND REAR OF THE VEHICLE.
DO NOT CRAWL UNDER THE VEHICLE, KEEP A SAFE
the valves.
assembly.
CAUTION:KEEP AWAY FROM THE WHEELS,
7. The system should now be repaired before using again.
IMPORTANT: Once the manual valve release is snug,
DO NOT tighten the manaual valve release past this
6. Close the valves by turning the manual valve releases
5. Check that all four jacks are now retracted.
Cap. See the back page of this manual for further info.
1/4" Nut Driver has been incorporated into the Breather
NOTE: Prior to APRIL 2002 a 1/4" Nut Driver was sent
with the Operators Manual. As of APRIL 2002 the
point as internal damage may occur to the solenoid.
clockwise.
POWER UNIT
VALVE
ASSEMBLY
MP35.601G
02OCT03
NOTE: Some assemblies have 4 large valves, some have
4 small valves and some will have 2 large valves in the
outer positions and 2 small valves in the center positions.
Valve relese T-Handles will turn several turns easily.
As the valve starts to open, the T-Handles will turn
harder. Make sure the valves have been opened far
enough to allow the jacks to retract.
SOLENOID VALVES VALVE RELEASE
T-HANDLE
RELEASE
VALVE
NUT
BREATHER CAP

OPERATING PROCEDURES
ROOM EXTEND PROCEDURE
2. Unlock all room-locking devices.
the room remove it before extending the room.
CAUTION:
extend the room.
4. To extend the room, press and hold the
ROOM CONTROL SWITCH in the "EXTEND" position
halt the operation of the room.
ROOM RETRACT PROCEDURE
2. To retract the room press and hold the
ROOM CONTROL SWITCH in the "RETRACT" position
halt the operation of the room.
3. Engage all room-locking devices.
IMPORTANT: Room-locking devices should be locked
while traveling.
KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING.
CAUTION:
CLEAR OF ROOM WHEN OPERATING.
KEEP PEOPLE AND OBSTRUCTIONS
5. If the room will not retract see the MANUAL ROOM
RETRACT PROCEDURE.
NOTE:
NOTE:
NOTE: If the MANUAL RETRACT WINCH is attached to
NOTE: Make sure there is adequate clearance to fully
NOTE: Releasing the ROOM CONTROL SWITCH will
NOTE: Releasing the ROOM CONTROL SWITCH will
NOTE:
The park brake must be set before a room can be
extended or retracted.
1. Level the vehicle using the hydraulic leveling system.
The park brake must be set before a room can be
extended or retracted.
after the room is fully extended or stops moving.
in the "EXTEND" position for more than ten seconds
of the room, do not reverse direction of the room until
after the room is fully extended. This assures proper
Hold the switch to "EXTEND" three or four seconds
pressurization of the cylinders.
Do not hold the ROOM CONTROL SWITCHIMPORTANT:
NOTE:
During normal operation
the room is fully extended. If necessary, the direction
of the room may be reversed, but watch for binding of
the room. If the direction of the room has been
reversed, DO NOT re-extend the room until the room
has been fully retracted.
If either side of the room stops moving, release the
room control switch immediately. DO NOT force the
room. DO NOT reverse direction of the room, contact
HWH Customer Service for assistance 1-800-321-3494.
HWH Customer Service for assistance 1-800-321-3494.
room. DO NOT reverse direction of the room, contact
room control switch immediately. DO NOT force the
If either side of the room stops moving, release the
after the room is fully retracted or stops moving.
in the "RETRACT" position for more than ten seconds
Do not hold the ROOM CONTROL SWITCH
reversed, DO NOT retract the room until the room
the room. If the direction of the room has been
of the room may be reversed, but watch for binding of
the room is fully retracted. If necessary, the direction
of the room, do not reverse direction of the room until
During normal operation
Hold the switch to "RETRACT" three or four seconds
after the room is fully retracted. This assures proper
has been fully extended.
pressurization of the cylinders.
IMPORTANT:
NOTE:
until the room is fully retracted.
until the room is fully extended.
MP35.9308
21SEP04
DISENGAGED BEFORE OPERATING THE ROOM.
RETRACTING DEVICES ARE DETACHED OR
ALL ROOM LOCKING, CLAMPING OR MANUAL
OPERATOR’S RESPONSIBILITY TO ENSURE THAT
PERSONAL INJURY AND VEHICLE DAMAGE. IT IS THE
DEVICES ATTACHED OR ENGAGED CAN CAUSE
ROOM LOCKING, CLAMPING OR MANUAL RETRACTING
CAUTION: OPERATING A ROOM WITH ANY
It is recommended to complete the Leveling Procedure
before operating room extensions.
It is recommended to retract room extensions
before retracting jacks.
3. Insert the room control panel key and turn the key switch on.
5. Turn the key switch off and remove the key.
1. Insert the room control panel key and turn the key switch on.
4. Turn the key switch off and remove the key.

MP35.952D
01MAY02
MANUAL ROOM AND GENERATOR SLIDE RETRACT PROCEDURE
OVERVIEW
1. Retract jacks following the LEVELING SYSTEM
RETRACT PROCEDURE.
2. Locate the HYDRAULIC PUMP/MANIFOLD unit.
VALVES are opened and internal pressure is released.
WINCH
WINCH STRAP
WINCH HANDLE
RATCHET LEVER
HOOK
MANUAL RETRACT WINCH
5. Slowly winch the room in by turning the WINCH HANDLE
clockwise. The RATCHET LEVER should produce a loud, sharp,
clicking noise.
in the hydraulic fluid and make winching more difficult.
CAUTION:
ON
OFF
HYDRAULIC PUMP/MANIFOLD
NOTE: The room may move slightly as the SOLENOID
NOTE :
NOTE: Winching the room in quickly will raise pressure
IMPORTANT:
6. When the room is fully retracted, engage the room locking
devices. Leave the retract winch engaged and the solenoid
CAUTION: THE ROOM EXTENSION SOLENOID
VALVE RELEASE NUTS MUST BE IN THE OPEN
POSITION WHEN THE MANUAL RETRACT WINCH IS
7. The system should be repaired before using again.
CAUTION: THE MANUAL RETRACT WINCH IS
OPERATE THE MANUAL RETRACT
WINCH BY HAND POWER ONLY. IF THE WINCH
CANNOT BE CRANKED EASILY WITH ONE HAND IT IS
PROBABLY OVERLOADED. IF WINCHING BECOMES
TOO DIFFICULT STOP AND CHECK FOR OBSTRUCTIONS
OR RESTRICTIONS ON THE ROOM AND ROOM
LEVELING SYSTEM MANIFOLD NOT SHOWN
SOLENOID VALVES
VALVE
RELEASE
NUT NUT
VALVE
RELEASE
3. Open the Solenoid Valves by slowly turning the valve
release nuts counter clockwise using the 1/4" nut driver
Only open the valves enough to retract NOTE: After repairs are made, when
closing the VALVE RELEASE NUTS, do
When manually retracting the room, make sure
the jacks are retracted before retracting the room.
EQUIPPED FOR MANUALLY RETRACTING THE ROOM
ONLY. IT IS NOT TO BE USED FOR LIFTING OR ANY
OTHER APPLICATION. HIGH FORCES ARE CREATED
WHEN USING A WINCH, CREATING POTENTIAL SAFETY
HAZARDS. FAILURE TO FOLLOW ALL CAUTIONS AND
INSTRUCTIONS MAY CAUSE FAILURE OF THE MANUAL
RETRACT WINCH OR CONNECTIONS RESULTING IN
DAMAGE OR PERSONAL INJURY. MAINTAIN FIRM GRIP
ON THE WINCH HANDLE AT ALL TIMES. NEVER
RELEASE THE HANDLE WHEN RATCHET LEVER IS IN
THE OFF POSITION AND THE WINCH IS LOADED. THE
WINCH HANDLE COULD SPIN VIOLENTLY AND CAUSE
PERSONAL INJURY. CHECK THE WINCH AND STRAPS
FOR DAMAGE OR WEAR, AND CHECK FOR PROPER
RATCHET OPERATION ON EACH USE OF THE WINCH.
DO NOT USE IF DAMAGED OR WORN.
supplied.
the room. DO NOT turn the release nuts more than
4 and 1/2 turns. Turning the nuts more could damage
the valves.
with the Operators Manual. As of APRIL 2002 the
NOTE: Prior to APRIL 2002 a 1/4" Nut Driver was sent
Cap. See the back page of this manual for further info.
1/4" Nut Driver has been incorporated into the Breather
4. Locate the MANUAL RETRACT WINCH and connect
it to the room according to the vehicle manufacturer’s
instructions. To extend the WINCH STRAP firmly grasp
WINCH HANDLE, place RATCHET LEVER in its OFF
position, and slowly rotate the WINCH HANDLE
counter clockwise, keeping a firm grip on the handle. When
enough WINCH STRAP is extended, place the RATCHET
LEVER in its ON position and slowly rotate the WINCH
HANDLE clockwise until the RATCHET LEVER locks.
EXTENSION MECHANISM.
valves open.
ENGAGED.
(WITH SOLENOID VALVES WITH VALVE RELEASE NUTS)
(USE ONLY WHEN THE ROOM WILL NOT RETRACT WITH THE ROOM CONTROL SWITCH)
not over tighten the nuts.
IMPORTANT: If the vehicle is not equipped with a winch,
DO NOT use other pulling devices to retract the room.
Follow steps 2 and 3 and try pushing the room in.
Contact the vehicle manufacturer or HWH Customer
Service at 1-800-321-3494 or 563-724-3396 for assistance.
The room can be retracted manually if a hydraulic or electric
failure prevents the room from being retracted using the
CONTROL SWITCH. For normal retract sequence see the
ROOM SLIDE RETRACT PROCEDURES. Refer to the
vehicle manufacturer for storage location of the winch
and information for connecting the winch to the room.

"LEVEL-OUT" ROOM EXTENSION MECHANISM
MANUAL ROOM RETRACTION PROCEDURES
Manual Retraction Bolt
Thumb Screw
5. Replace both Thumb Screws.
MP35.953D
01AUG03
OPERATING PROCEDURES
DO NOT over tighten.
IMPORTANT: If at any stage something is not
understood or if the room begins to bind DO NOT force
the room, contact HWH Customer Service for assistance
1-800-321-3494.
8. Replace both Thumb Screws. Leave the manual valve
releases open.
7. Repeat steps 4 and 5 alternating from mechanism to
mechanism rotating each Manual Retraction Bolt 12
complete turns until room is sealed. (DO NOT exceed 15
ft.lbs) Make sure the room does not bind.
6. Return to the first room extension mechanism and rotate
the Manual Retraction Bolt clockwise 12 complete turns.
5. Move to the second room extension mechanism, rotate
the Manual Retraction Bolt clockwise 12 complete turns.
4. Using wrench provided, a personal wrench or a tire iron
with a 13/16" or 21mm opening rotate either mechanism’s
Manual Retraction Bolt clockwise 6 complete turns.
3. Remove the Thumb Screws (one on each mechanism)
completely by turning them counterclockwise.
2. Gain access to the 13/16" Manual Retraction Bolts (one
on each mechanism) by raising the STORE-MORE access
panel.
1. Determine which extend and retract solenoid valves are
assigned to the room. Manually open the valve release nuts
for the extend and retract solenoid valves by turning the 1/4"
release nuts counter clockwise 4 and 1/2 turns. Turning the
6. Close both manual valve releases assigned to the
room. Turn the valve release nuts clockwise until snug.
4. Move to the second room extension mechanism and
repeat step 3.
3. If needed, using wrench provided, a personal wrench or
a tire iron with a 13/16" or 21mm opening rotate either
mechanism’s Manual Retraction Bolt counterclockwise until
resistance is met.
2. Remove the Thumb Screws (one on each mechanism)
completely by turning them counterclockwise.
1. Gain access to the 13/16" Manual Retraction Bolts (one
on each mechanism) by raising the STORE-MORE access
panel.
IMPORTANT: DO NOT EXTEND THE ROOM
UNTIL THE STEPS BELOW HAVE BEEN
COMPLETED!
SOLENOID VALVES
LEVELING SYSTEM MANIFOLD NOT SHOWN
HYDRAULIC PUMP/MANIFOLD
nuts more could damage the valves.
NOTE: The breather cap dip stick is also a 1/4" nut driver.
VALVE
RELEASE
NUT
VALVE
RELEASE
NUT
BREATHER
CAP-DIP
STICK

MAINTENANCE
MP45.241C
03JAN07
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
SENSING UNIT - TOP VIEW
D
C
A
B
LED’S - LOCATION
CONTROL BOX - SIDE VIEW
MAY BE DIFFERENT
NOT IN PARK/BRAKE CHECK
Set the park/brake. Switch the ignition to the "ACC" or "ON"
position. Push the "ON/OFF" switch toward "ON". Release
the parking brake and confirm that the "PARK" indicator light
comes on. Reset the parking brake. The "PARK" indicator
light should go out. Switch the ignition to "OFF".
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.
19FEB07
MP45.3259
ADJUSTMENT
NUT (7/8" or 3/4")
BOX WALL
CONTROL
SCREW (Phillips or 1/4")
ADJUSTMENT
NUT (5/16")
ADJUSTMENT
SENSING UNIT ADJUSTMENT
adjustments first, then hold the adjustment nut from moving
while making the A-C adjustment.
wrench and a philips screw driver will be needed.
needed. A 7/8", 3/4" or 5/16" socket w/driver or box end
Touch Panel, manual adjustments to the Sensing Unit are
properly adjusted. If there are yellow LEVEL lights lit on the
are no yellow lights lit on the Touch Panel, the sensing unit is
With the vehicle level according to the bubble level, if there
Control Box. If two LED’s are on, it is best to make the B-D
be a problem with the Sensing Unit or the mounting of the
be turned more than 3/4 turn to turn the LED out, there may
to be turned more than 1/2 flat or the adjustment screw has to
screw will turn out LED’s A and C. If the adjustment nut has
the adjustment nut to turn out LED’s B and D. The adjustment
to the drawing below. The Sensing Unit is adjusted by turning
There are four LED’s on the Sensing Unit, A,B,C and D. Refer
Control Box is mounted to the power unit/valve assembly.
The Sensing Unit is mounted inside the Control Box. The
level the vehicle until the bubble is centered.
level, ignoring the yellow LEVEL lights on the Touch Panel,
that is to be level. Using the Leveling System and the bubble
the freezer floor or upon whichever surface within the vehicle
Level the vehicle by placing a bubble level in the center of
the vehicle, the front is still low. This means the front
"tweaking" process until the system levels the vehicle
touch panel. Recheck with a level. Repeat the
relevel the vehicle using the yellow level lights on the
the front up more. Again, unlevel the vehicle then
the front yellow light to stay on slightly longer to bring
instructions for LED’s A, B, C, and D. This will allow
the OPPOSITE direction that is given in the above
Move the adjustment for that light very, very, slightly in
which sensing unit light is the front light, A-B-C or D.
yellow level light is turning off too soon. Determine
properly.
Example: After the initial adjustment and releveling
sensing unit, ignoring the LED’s on the sensing unit.
yellow level lights go out, instead just "tweak" the
needed, DO NOT try to adjust the sensing unit until the
LEVEL lights. Recheck the level. If more adjustment is
lights are on. Level the vehicle according to the yellow
vehicle to an unlevel position so one or two yellow
IMPORTANT: When all 4 LED’s are off, move the
If LED (D) is lit: Turn the adjustment nut CLOCKWISE
If LED (B) is lit: Turn the adjustment nut COUNTER
If LED (C) is lit: Turn the adjustment screw CLOCKWISE
If LED (A) is lit: Turn the adjustment screw COUNTER
NOTE: If opposing LED’s are lit, there is a problem with
until the LED is off.
CLOCKWISE until the LED is off.
until the LED is off.
CLOCKWISE until the LED is off.
the Sensing Unit.
ADJUSTMENT NUT (7/8" or 3/4")
ADJUSTMENT SCREW (Phillips or 1/4")
ADJUSTMENT NUT (5/16")

BREATHER CAP - DIPSTICK - 1/4" NUT DRIVER
MP85.999X
10JAN07
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