HWH 625 Series User manual

OPERATOR’S MANUAL
ML40392/MP04.2801
08MAR07
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
625 SERIES LEVELING SYSTEM
HWH COMPUTER-CONTROLLED
R
Straight-Acting Jacks
AP40391
R
Multiple Room Extensions
FOR TRAILERS
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
HWH COMPUTERIZED LEVELING
EXTEND
RETRACT
AUTO
STORE
LEVEL
AUTO
CAUTION!
BRAKE
TRAVEL
EMERGENCY
STOP MODE
PARK/
NOT IN
EXCESS
R
SLOPE
MANUAL
RETRACT
EXTEND
W
CORPORATION
HH
R
AND
SPACEMAKER ROOM EXTENSION SYSTEMS
R
No Jack Stop Rods

WARNING !
READ THE ENTIRE OPERATOR’S MANUAL BEFORE OPERATING.
MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.
KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE LEVELING SYSTEM IS IN USE.
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 PENETRATE SKIN
WEAR SAFETY GLASSES WHEN INSPECTING OR SERVICING THE SYSTEM TO PROTECT EYES FROM DIRT, METAL
MP14.000
3
08DEC1
0
IMPORTANT: IF VEHICLE IS EQUIPPED WITH A ROOM EXTENSION, READ ROOM EXTENSION SECTION BEFORE
OPERATING LEVELING SYSTEM.
WHILE HITCHING OR UNHITCHING, AVOID AREAS WHERE BODY MAY BE CRUSHED BY SUDDEN DROPPING OR SLIDING
OF THE TRAILER.
DO NOT LIFT TOW VEHICLE WITH 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.

MP24.2850
07APR14
CONTROL IDENTIFICATION
625S / 725 / 2000 SERIES LEVELING SYSTEM
COMPUTER-CONTROL
RETRACT
EXTEND
HWH COMPUTERIZED LEVELING
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
"EXCESS SLOPE" Indicator light
"AUTO LEVEL" Button
AUTO LEVEL/STORE
CANCEL Button
"NOT IN PARK" Indicator light
"TRAVEL MODE"
Indicator light
AUTO LEVEL Indicator light
"AUTO STORE" Button
STORE Indicator light
RAISE LEFT SIDE Manual button
LOWER LEFT SIDE Manual button
STORE
AUTO
CANCEL
AUTO
LEVEL
TRAVEL
BRAKE
MODE
WARNING!
EXCESS
SLOPE
NOT IN
PARK/
R
LOWER FRONT Manual button
RAISE FRONT Manual button
JACK DOWN
Indicator light (4) red
RAISE RIGHT SIDE
Manual button
LOWER RIGHT SIDE
Manual button
LEVEL SENSING
Indicator light (4) yellow
RAISE REAR Manual button
LOWER REAR Manual button
MANUAL
RETRACT
EXTEND
CONTROL FUNCTIONS
the automatic store function.
STORE INDICATOR LIGHT:
during the automatic leveling function.
AUTO LEVEL INDICATOR LIGHT:
INDICATOR LIGHTS
start the automatic leveling function.
They are functional only when the ignition is in the "ON"
yellow level indicators are jacks down WARNING lights.
will retract their respective jack pairs to lower the vehicle.
extend their respective jack pairs to lift the vehicle.
RETRACT BUTTONS (DOWN ARROWS):
EXTEND BUTTONS (UP ARROWS):
CONTROL BUTTONS
WARNING LIGHTS:
four jacks at the same time.
"AUTO STORE" BUTTON:
"AUTO LEVEL" BUTTON:
any leveling system operation.
"CANCEL" BUTTON:
This light will flash during
This light will flash
The four red lights surrounding the
Push this button any time to
These buttons will
Push this button to retract all
Push this button to stop
These buttons
The four yellow indicating lights are
level sensing indicators. When a yellow light is on, it
indicates that its side, end, or corner of the vehicle is low.
No more than two lights should be on at the same time.
When all four yellow LEVEL lights are out, the vehicle is
level.
It will be on when any one or more jacks are extended
This is a jacks down warning. It will
This indicator light will be on
This indicator will light
This indicator will light when
INDICATOR LIGHTS (CONTINUED)
light mounted in the dash separate from the touch panel.
MASTER "JACKS DOWN" WARNING LIGHT:
when the ignition is on, when the jacks are retracted and
when the hand/auto brake is not set and the "AUTO LEVEL"
the leveling system cannot level the vehicle.
"TRAVEL MODE" LIGHT:
sound if the master "JACKS DOWN" warning light is on.
and the ignition is "ON".
there are no red WARNING lights on.
AUDIBLE ALARM:
button is being pushed.
"NOT IN PARK/BRAKE" LIGHT:
"EXCESS SLOPE" LIGHT:
LEVELING LIGHTS:
This is a
or "ACC" position, the system is on, and the jacks are
extended 1/4 to 1/2 inch.

CONTROL FUNCTIONS
CONTROL IDENTIFICATION
MP24.456
0
08DEC1
5
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 i
n
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. The panel may be equipped with two rocker
ROOM OPERATOR’S PANEL
KEY
KEY SWITCH: ROOM CONTROL SWITCH:
is OEM provided. Refer to OEM operator instructions.
This switch (not shown)ROOM SELECTOR SWITCH:
OEM PROVIDED ROOM SELECTOR SWITCH (IF APPLICABLE)
switches for controlling multiple rooms.

MP25.9995
14MAR12
CONTROL IDENTIFICATION
PUMP RUN TIME
SYSTEM VARIATIONS FOR PUMP RUN TIME
Contact HWH corporation to get specific information about the system in this vehicle.
No matter what HWH system is on the vehicle, the pump should not be ran for more than four minutes
(3" motors) or six minutes (3.7" or 4.5" motors) without allowing the pump motor to cool for thirty minutes.
Continuous operation of the pump motor without allowing the motor to cool can damage the pump motor.
Some HWH systems are equipped with a lighted reset switch.
If the processor turns the pump off because the run time has
been exceeded, the light in the reset switch will turn on. The
With some systems, when the processor has turned the pump off because the run time has been exceeded, power
to the HWH system must be turned off and back on before the system will operate. With motorized vehicles, turn the
ignition off and back on. With non-motorized vehicles, turn the master power switch for the HWH system off and back
DO NOT continue without allowing the pump motor to cool for thirty minutes.
When operating some leveling systems manually or operating the room extensions, the pump will turn off and back
on while pushing the control button when the pump run time has been exceeded.
the pump motor to cool for thirty minutes.
Some systems can be turned back on immediately after the processor turns the pump off.
back on or run the pump without allowing the pump motor to cool for thirty minutes.
Some systems with rooms run the rooms separate from the system processor. These systems do not monitor pump
run time when operating the rooms.
pump motor to cool for thirty minutes.
The HWH systems with a computer processor monitor the pump run time and will turn the pump off if the run time exceeds a
specified time. This time can vary with different systems. Due to available electronics or system design, the pump run time
programs will also vary. Leveling systems and room extensions that are not controlled by a system processor have no pump
run time protection.
thirty minutes.
Pump motors used with HWH leveling systems and room extension systems come in 3 different diameters; 3", 3.7" and 4.5".
Contact the vehicle manufacturer or HWH for help with identifying the motor size.
runs for more than four minutes with a 3" motor; or six minutes with a 3.7" or 4.5" motor that the motor is allowed
to cool for thirty minutes before continuing. Continuous operation of the pump motor without allowing the motor
PUMP RUN TIME
It is important that any time the pump
to cool can damage the motor.
DO NOT run the pump more than four or six minutes without allowing the pump motor to cool for
DO NOT run the pump more than four or six minutes without allowing the
DO NOT turn the system
DO NOT continue without allowing
on.
system will not operate until the reset switch is pushed.
DO NOT continue without allowing the pump motor to
cool for thirty minutes. LIGHTED RESET SWITCH
For cold weather information see "COLD WEATHER OPERATIONS" below.
COLD WEATHER OPERATIONS
HWH leveling and room extension systems are designed to function in cold weather down to 0 degrees Fahrenheit. Below
freezing (32 degrees Fahrenheit) the jacks or rooms will operate slower than usual.
For operation in temperatures dropping below -20 degrees Fahrenheit, it is necessary that the system is equipped with oil
designed for extreme cold weather application such as a synthetic oil. (Contact HWH for recommendations.)
DO NOT run the pump motor continuously.
Continuous operation of the pump with slow moving jacks or rooms in cold weather, without allowing the pump motor to
cool will cause the pump motor to burn up and damage the pump assembly.
It is important that any time the pump runs for more than four minutes
continuing. Continuous operation of the pump motor without allowing the motor to cool can damage the motor.
with a 3" motor; or six minutes with a 3.7" or 4.5" motor that the motor is allowed to cool for thirty minutes before

OPERATING PROCEDURES
MP34.0201
15NOV07
GENERAL INSTRUCTIONS
PREPARATION FOR TRAVEL
If parking on soft ground or asphalt paving, wood blocks or
pads must be placed under the jacks.
Press the "EMERGENCY STOP" button at any time
to stop the operation of the system.
Any time a hydraulic leveling process is interrupted, retract
the jacks according to the JACK RETRACTION Section and
then restart the leveling process.
Before traveling, the red jack warning lights must be off
and the "TRAVEL MODE" light must be on. 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
or the green "TRAVEL MODE" light is not lit, the system
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:
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 should be fully retracted before traveling.
DO NOT MOVE THE VEHICLE IF ONE
OR MORE JACKS ARE EXTENDED TO THE GROUND.
CAUTION:
needs to be serviced. INTO THE STORE/TRAVEL POSITION.
Any time the "AUTO LEVEL" button has been pushed,
push the "AUTO STORE" button before traveling.
ROOM EXTENSION PROCEDURES
the vehicle before extending the room.
IMPORTANT: It is recommended to level and stabilize
IMPORTANT: Extending or retracting any leveling jacks
when the room is extended is not recommended.
IMPORTANT: If the vehicle is equipped with a room
extension read this section carefully.
when the vehicle is supported by the leveling system.
IMPORTANT: Do not use a room extension support
Refer to the vehicle owner’s manual for proper operation of
room extensions.

OPERATING PROCEDURES
SET UP AND AUTOMATIC LEVELING PROCEDURE
1. Trailer must be unhitched from the tow vehicle before level-
ing. The HWH front jacks may be used to lift the trailer for
unhitching. If auxiliary jacks are used to unhitch the trailer,
If parking on soft ground or asphalt paving, a wood block or
for unhitching.
pad should be placed under each jack.
will result if raise arrows are operated for an extended
period of time.
2. Lower the front of the trailer until the front yellow level
indicator light comes on. This is done by pushing the front
RETRACT button (DOWN ARROW). The red jacks down
warning lights will light when the jacks are extended
NOTE: Refer to the trailer manufacturer owner’s manual
IMPORTANT: Overheating and excessive current drain
08MAR07
MP34.2706
extend the HWH front jacks to the ground and retract the
auxiliary jacks before the leveling system is used for leveling.
1/4 to 1/2 inch.
NOTE: The front yellow LEVEL light must be on before
automatic leveling will function.
light will start to flash.
3. Press the "AUTO LEVEL" button. The "AUTO LEVEL"
The system will automatically extend the jacks to level the
vehicle and then extend any remaining jacks for stabilizing.
After the system has finished leveling and stabilizing, it will
automatically shut off.
EXCESS SLOPE SITUATION: In the event the jacks are
unable to level the coach, the "EXCESS SLOPE" light will
come on. Excess slope is two jacks fully extended without
turning the yellow level light out. The system will not stabilize
the vehicle if the "EXCESS SLOPE" light comes on. One or
more jacks may be extended. The system will shut off
leaving the "EXCESS SLOPE" light on. The "EXCESS
SLOPE" light will remain on if there is power to the control
box, until the jacks have been fully retracted turning the red
warning lights out. Refer to the JACK RETRACTION section.
Move the vehicle to a more level position or level the vehicle
as close as possible according to the MANUAL LEVELING
section.
NOTE: The manual buttons (UP and DOWN arrows) on
the right side of the panel will function at any time. The
front UP arrow (Raise Front) manual button will extend
the front jacks. DO NOT push the "AUTO LEVEL" button
if the manual buttons are to be used.

OPERATING PROCEDURES
MP34.2803
12JUL07
CAUTION:
IMPORTANT: DO NOT interrupt power to the leveling
PREPARATION FOR TRAVEL
THE OPERATOR MUST BE SURE THAT
THERE ARE NO OBJECTS UNDER THE VEHICLE AND THAT
ALL PEOPLE ARE CLEAR OF THE VEHICLE.
system while the AUTO STORE indicator light is on.
DO NOT push the "EMERGENCY STOP" button. The
3. If jacks cannot be retracted by the above procedure see
MANUAL JACK RETRACTION Section.
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
THE STORE/TRAVEL POSITION.
system must be allowed to completely finish the
1. Hitch the trailer to the tow vehicle using the procedure
supplied by the trailer manufacturer. The front Retract
NOTE: Pushing a room control switch to extend or
retract will interrupt the STORE mode. When the
switch is released, the leveling system will return
(Down Arrow) button should be used to hitch the trailer
to the tow vehicle.
do not go out, the system will not shut off. Push the
"EMERGENCY STOP" button to turn the system off.
NOTE: If any one of the four red WARNING lights
remains on, the system will try to store the jacks for 20
minutes from the time the "AUTO STORE" button is
pushed, then turn off.
the four red warning lights go out. If any red warning light
panel will automatically turn off 6 minutes after the last of
the "AUTO STORE" button. All 4 jacks will retract. The
and the weight of the trailer is off of the front jacks, push
2. After the trailer is securely hitched to the tow vehicle,
to the STORE mode.
VEHICLE OR SECURELY SUPPORTED BY THE
BUTTON IF THE TRAILER IS HITCHED TO A TOW
EXISTING LANDING GEAR.
CAUTION:ONLY USE THE "AUTO STORE"
STORE mode.
is no weight on the front jacks.
The "AUTO STORE" button will not function until there
button until the trailer is hitched to the tow vehicle.
IMPORTANT: DO NOT push the "AUTO STORE"

OPERATING PROCEDURES
MANUAL LEVELING
1. Trailer must be unhitched from the tow vehicle before level-
ing. The HWH front jacks may be used to lift the trailer for
unhitching. If auxiliary jacks are used to unhitch the trailer,
If parking on soft ground or asphalt paving, a wood block or
for unhitching.
pad should be placed under each jack.
will result if raise arrows are operated for an extended
period of time.
2. Lower the front of the trailer until the front yellow level
indicator lights come on. This is done by pushing the front
RETRACT button (DOWN ARROW). The red jacks down
3. A lit yellow LEVEL light indicates that the side, end or corner
of the trailer is low. Pushing the up arrow for corresponding yellow
level lights will extend that jack or jack pair to level the vehicle.
Extend jacks as needed to put out all the yellow lights. Always
give a side yellow level light priority when leveling the trailer.
If the ground is too uneven, the jacks may not have engough
stroke to level the trailer. The trailer may have to be moved.
4. After the trailer is level, the jacks not used for leveling may
be extended until they touch the ground. This provides addi-
warning lights will light when the jacks are extended
tional stability against wind and activity in the trailer. Jacks
NOTE: Refer to the trailer manufacturer owner’s manual
IMPORTANT: Overheating and excessive current drain
15NOV07
MP34.3011
extend the HWH front jacks to the ground and retract the
auxiliary jacks before the leveling system is used for leveling.
1/4 to 1/2 inch.
NOTE: When a side arrow (UP or DOWN) is pushed only
the rear jack on that side will extend or retract.
used to stabilize the trailer should lift the trailer about 3/4 inch.

OPERATING PROCEDURES
MP34.3303
18DEC09
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. If equipped with
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,
9. The system should now be repaired before using again.
3. Using the diagrams below identify the style and location
5. Repeat the process by identifying then opening the two
rear control valves.
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.
The T-Handle
turn the
jack functions. (Valve styles and arrangements will vary)
POWER UNIT-MANIFOLD ASSEMBLY
MANIFOLD
of your two front jack control 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 correct valves.
Slowly turn the manual valve releases counter clockwise
until the jacks start to retract. Hitch the trailer to the tow
4 and 1/2 turns
HWH Corporation customer service.
FOR TRAILERS WITHOUT LOCK VALVE
RR RF LR
LF
VALVE ARRANGEMENT
TRAILER
RIGHT
REAR
FRONT
RIGHT
LEFT
FRONT REAR
LEFT
landing gear, lower the landing gear to support the trailer
while manually retracting the jacks.
vehicle during this operation if the vehicle is not equipped
8. Retract all landing gear before traveling.
with an alternate landing gear.
valve. Replace the protective plastic plug.
Turning the nut more could damage the
release nut more than
The 1/4" Valve
removed to gain access. Open valve 1-1/2 to 2 full turns.
release nut is located under a plastic plug that must be
turn the 1/4" valve
Large style with Valve Release Nut:
2 full turns.
DO NOT

OPERATING PROCEDURES
MP34.3304
18DEC09
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. If equipped with
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,
9. The system should now be repaired before using again.
3. Using the diagrams below identify the style and location
5. Repeat the process by identifying then opening the two
front control valves. Hitch the trailer to the tow vehicle
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.
The T-Handle
turn the
jack functions. (Valve styles and arrangements will vary)
POWER UNIT-MANIFOLD ASSEMBLY
MANIFOLD
of your two rear jack control 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 rear jacks by opening the correct valves.
Slowly turn the manual valve releases counter clockwise
until the jacks start to retract.
4 and 1/2 turns
HWH Corporation customer service.
FOR TRAILERS WITH LOCK VALVE
RR LR
RF
LF
LOCK
VALVE ARRANGEMENT
TRAILER
RIGHT
REAR
REAR
LEFT
LEFT
FRONT FRONT
RIGHT
landing gear, lower the landing gear to support the trailer
while manually retracting the jacks.
during this operation if the trailer is not equipped with an
8. Retract all landing gear before traveling.
LARGE STYLE WITH T-HANDLE
VALVE RELEASE
alternate landing gear.
valve. Replace the protective plastic plug.
Turning the nut more could damage the
release nut more than
The 1/4" Valve
removed to gain access. Open valve 1-1/2 to 2 full turns.
release nut is located under a plastic plug that must be
turn the 1/4" valve
Large style with Valve Release Nut:
2 full turns.
DO NOT

OPERATING PROCEDURES
ROOM EXTEND PROCEDURE FOR ROOMS
2. Unlock all room-locking devices to include travel
the room remove it before extending the room.
WARNING:
extend the room.
5. To extend the room, press and hold the
ROOM CONTROL SWITCH in the "EXTEND" position
until the room is fully extended.
halt the operation of the room.
6. Turn the room control panel KEY SWITCH to
7. Turn off the ignition switch, if applicable.
KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING.
3. Turn the ignition switch to ACCESSORY or turn
IMPORTANT: Do not use a room extension support
when the vehicle is supported by the leveling system.
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
4. Turn the room control panel KEY SWITCH to
the "ON" position.
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.
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.
1. The park brake must be set for motorized vehicles.
The room will not operate if the park brake is not set.
MP34.430
0
06MAY1
9
the "OFF" position.
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
room extension and leveling system operation.
Refer to vehicle manufacturer for proper sequence of
WARNING: OPERATING A ROOM WITH ANY
a MASTER POWER SWITCH on, if applicable.
clamps/locks supplied by manufacturers other than HWH.
WITHOUT TRAVEL CLAMPS
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.
room is fully extended (and down if applicable) or stops moving
.
Do not hold the ROOM CONTROL SWITCH
If either side of the room stops moving, release the
in the "EXTEND" position for more than ten seconds after the
IMPORTANT: If the room extension is a level out room,
hold the room control switch to the extend position
until the room is fully extended and has dropped to the
completely lowered position.
IMPORTANT:

OPERATING PROCEDURES
3. Turn the room control panel KEY SWITCH to
4. To retract the room press and hold the
ROOM CONTROL SWITCH in the "RETRACT" position
until the room is fully retracted.
halt the operation of the room.
5. Turn the room control panel KEY SWITCH to
6. Turn the ignition switch off, if applicable.
IMPORTANT: Room-locking devices should be locked
while traveling.
WARNING:
CLEAR OF ROOM WHEN OPERATING.
KEEP PEOPLE AND OBSTRUCTIONS
7. If the room will not retract see the MANUAL ROOM
RETRACT PROCEDURE.
NOTE: Releasing the ROOM CONTROL SWITCH will
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:
MP34.450
0
07MAY1
9
1. The park brake must be set, if applicable.
The room will not operate if the park brake is not set.
the "ON" position. the "OFF" position.
a MASTER POWER SWITCH on, if applicable.
2. Turn the ignition switch to ACCESSORY or turn
WITHOUT TRAVEL CLAMPS
ROOM RETRACT PROCEDURE FOR ROOMS
the room must raise completely before it will retract.
If the room will not raise, do not force the room.
Important: if the room extension is a level-out room,
Refer to the MANUAL ROOM LIFT PROCEDURES
page.
room extension and leveling system operation.
Refer to vehicle manufacturer for proper sequence of

MP34.950
0
20JUN1
4
MANUAL ROOM AND GENERATOR SLIDE RETRACT PROCEDURE
OVERVIEW
1. Retract jacks following the LEVELING SYSTEM
RETRACT PROCEDURE.
2. Locate the HYDRAULIC PUMP and/or 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.
WARNING:
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 lockin
g
devices. Leave the retract winch engaged and the solenoid
WARNING: THE ROOM EXTENSION SOLENOID
VALVE RELEASE MUST BE IN THE OPEN POSITION
WHEN THE MANUAL RETRACT WINCH IS ENGAGED.
7. The system should be repaired before using again.
WARNING: A MANUAL RETRACT WINCH PROVIDED
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 TO DIFFICULT
STOP AND CHECK FOR OBSTRUCTIONS/RESTRICTIONS
ON THE ROOM AND ROOM EXTENSION MECHANISM.
LEVELING SYSTEM MANIFOLD NOT SHOWN
SOLENOID VALVES
VALVE
RELEASE
NUT 1/4"
CAM
VALVE
RELEASE
3. Open Nut Style Solenoid Valves by slowly turning the
valve release nut counter clockwise using a 1/4" nut driver.
Only open the valves enough to retract NOTE: After repairs are made, when closing the
VALVE RELEASE NUTS, do not over tighten the nuts.
When manually retracting the room, it is recommended
the jacks are retracted before retracting the room.
BY HWH IS 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 WARNINGS AND INSTRUCTIONS
MAY CAUSE FAILURE OF THE MANUAL RETRACT WINCH OR
CONNECTIONS RESULTING IN DAMAGE OR PERSONAL INJURY.
MAINTAIN A 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.
the room. DO NOT turn the release nuts more than
4 and 1/2 turns. Turning the nuts more could damage
the valves.
4. Locate the MANUAL RETRACT DEVICE and connect it to
the room according to the vehicle manufacturer’s instructions
.
To extend a 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.
valves open.
(USE ONLY WHEN THE ROOM WILL NOT RETRACT WITH THE ROOM CONTROL SWITCH)
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 retract device and information for connecting
the device to the room.
Open Cam Style Style Solenoid Valves by following the
instructions located on the last page of this manual
MP84.9999.
Some systems may have a remote manifold.

MAINTENANCE
MP44.0000
15NOV07
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.
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
.
22NOV1
6
MP44.050
0
ignition to "OFF".
WINTER WEATHER DRIVING
To help reduce the corrosion of jacks after exposure to anti
-
soapy water.
icing / deicing agents, thoroughly wash jacks with warm continue to absorb moisture from the air even after they
Anti-icing / deicing agents when splashed on your vehicle,
have dried. This can facilitate corrosion of metallic
components, such as HWH jacks.

01MAR10
MP44.1500
± 1 inch side to side on a 36 foot vehicle. Typical leveling results will be better.
The sensing unit has an accuracy tolerance of ± 5.4 inches front to rear and
SENSING UNIT ACCURACY TOLERANCE
ADJUSTMENT SCREW
SENSING UNIT ADJUSTMENT
to the drawing below. The Sensing Unit is adjusted by turning
ADJUSTMENT
NUT (7/8" or 3/4")
while making the A-C adjustment.
adjustments first, then hold the adjustment nut from moving
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
MAY BE DIFFERENT
LED’S - LOCATION
BOX WALL
CONTROL
(OLD STYLE)
A
C
TOP VIEW - SENSING UNIT
D B
end wrenches of 7/8, 3/4, 1/2, 5/16 or 1/4 sizes will be needed.
needed. A Phillips screw driver or sockets w/driver or box
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
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
lights are on. Level the vehicle according to the yellow
"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
the vehicle, the front is still low. This means the front
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
SCREW (Phillips or 1/4")
ADJUSTMENT
SIDE VIEW - CONTROL BOX
NUT (5/16" OLD) - (1/2" NEW)
ADJUSTMENT
NUT (7/8" or 3/4")
(OLD STYLE)
ADJUSTMENT
properly.
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 (5/16" OLD) - (1/2" NEW)
SENSING UNIT MAINTENANCE/SERVICE
MI15.4550

ML60078/MP84.999
9
16APR1
9
RELEASE
NUT
NOTE: When opening the
valve DO NOT turn the valve
release nut more than 4 and
1/2 turns counter clockwise.
OIL LEVEL
1/4" NUT DRIVER
THE BREATHER CAP IS
LOCATED ON THE TOP
TOP OF THE RESERVOIR. BEFORE RETURNING THE
BREATHER CAP TO THE RESERVOIR, REMOVE ANY
counter clockwise. Damage to
nut more than 2 full turns
NOTE: When opening the valve
DO NOT turn the valve release
REMOVE TO GAIN
ACCESS TO THE 1/4"
VALVE RELEASE NUT
2 1/4" DIAMETER SOLENOID VALVE
1 1/2" DIAMETER SOLENOID VALVE
GROOVES
SIDE OF THE POWER
UNIT RESERVOIR
NOTE: The cam release may be
rotated in any direction on the
valve. DO NOT assume that
pushing down will open the
1 1/2" DIAMETER SOLENOID VALVE
valve. Pushing the cam in the
2 1/4" DIAMETER SOLENOID VALVE
the valve may result.
Damage to the valve may
FILL BETWEEN
SOLENOID VALVES WITH CAM RELEASE
wrong direction could damage
the valve.
NOTE: The cam release may be
rotated in any direction on the
valve. DO NOT assume that
pushing down will open the
valve. Pushing the cam in the
wrong direction could damage
the valve.
result.
WIRE TIE
WIRE TIE
HYDRAULIC SOLENOID VALVE
INFORMATION/INSTRUCTION SHEET
INDENTIFICATION - MANUAL OPERATIONS - REPLACEMENT
Manual retract
VALVE OPEN
CAM RELEASE
CAM RELEASE
Default position
VALVE CLOSED
CAM RELEASE
Default position
VALVE CLOSED
position
CAM RELEASE
VALVE OPEN
position
Manual retract
REPLACEMENT VALVES WILL HAVE A VALVE RELEASE CAM
SOLENOID VALVES WITH 1/4" NUT RELEASE
1/4" NUT DRIVER, CLEAN ANY DEBRIS FROM THE
CAP, EITHER TO CHECK THE OIL LEVEL OR TO USE
IMPORTANT: PRIOR TO REMOVING THE BREATHER
INCLUDING DEBRIS INSIDE THE 1/4" NUT DRIVER.
PLASTIC PLUG:
PAINT CHIPS OR OTHER DEBRIS FROM THE DIPSTICK
VALVE
NUT
RELEASE
VALVE
open the valve. Do not over tighten
when closing.
approximately 4 1/2 turns to fully
compresses a spring. It takes
turn easy at first, then harder as it
open the valve. T-handle should
Turn T-handle counterclockwise to
BREATHER CAP W/NUT DRIVER
SOLENOID VALVES WITH T-HANDLE RELEASE
NOTE: OLD STYLE HEX SHAPED
SOLENOID VALVES HAVE NO MANUAL
VALVE RELEASE.
2 1/4" DIAMETER SOLENOID VALVE