HWH 2000 SERIES User manual

OPERATOR’S MANUAL
ML37520/MP05.9991
12JUL06
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
2000 SERIES LEVELING SYSTEM
HWH COMPUTER-CONTROLLED
R
Straight-Acting Jacks
AP37519
R
Multiple Room Extensions (with Air Seals)
CAUTION!
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
HWH COMPUTERIZED LEVELING
ON
STORE
LEVEL
OFF
BRAKE
TRAVEL
EXCESS
PARK/
NOT IN
SLOPE
MODE
CORPORATION
W
HH
R

OPERATING MANUAL
MP15.3000
11MAR08
WARNING !
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 IDENTIFICATION
MP25.902C
12JUL06
ON
HWH COMPUTERIZED LEVELING
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
EXCESS
SLOPE
NOT IN
PARK
TRAVEL
OFF CAUTION!
STORE
"EXCESS SLOPE"
LIGHT
"NOT IN PARK" LIGHT
LEVELING SYSTEM
ACTIVE LIGHT
"I" ON BUTTON
"STORE" BUTTON
"OFF" BUTTON
"TRAVEL MODE" LIGHT
FRONT EXTEND
WARNING LIGHTS
(4- Red)
RIGHT SIDE (LOWER)
LEVELING LIGHTS
(4- Yellow)
REAR RETRACT
STORE LIGHT
LEFT SIDE (LOWER)
button. The vehicle ignition must be in the "ON" or "ACC"
leveling system cannot level the vehicle.
CONTROL FUNCTIONS
CONTROLS
lLEVEL
"OFF" BUTTON:
"I" BUTTON:
"STORE" BUTTON:
UP ARROWS (RAISE BUTTONS):
"EXCESS SLOPE" LIGHT:
"NOT IN PARK/BRAKE" LIGHT:
"TRAVEL MODE" LIGHT:
MASTER WARNING LIGHT:
Sides or ends of the vehicle will raise while these buttons are
buttons are used for manually extending the leveling jacks.
WARNING LIGHTS:
This is the ON button and automatic operation These momentary
pushed.
This indicator will light
when the ON button is pushed and the hand/auto park brake
INDICATOR LIGHTS
LEVELING LIGHTS:
This indicator light will be ON
when the ignition is ON, when the jacks are retracted, and
level sensing indicators. When a yellow light is on,
it indicates that its side or end of the vehicle is low. No more
STORE LIGHT:
than two lights should be on at the same time.
The four red lights surrounding the
yellow level indicators are jack WARNING lights. They are
functional when the ignition is in the "ON" or "ACC" position.
A lit WARNING light indicates that jack is extended
This indicator will light when the
The four yellow indicating lights are
This light will flash when the system is in the
STORE mode.
MODE
(LOWER) BUTTON
RETRACT BUTTON
REAR EXTEND
(RAISE) BUTTON
RETRACT BUTTON
RIGHT SIDE (RAISE)
EXTEND BUTTON
(RAISE) BUTTON
(LOWER) BUTTON
FRONT RETRACT
LEFT SIDE (RAISE)
(EXTEND) BUTTON
MASTER WARNING LIGHT
(SEE HWH LIGHTED RESET SWITCH)
HARD RESET SWITCH
This button is used to automatically
retract the jacks. The Leveling System must be ON to use
the "STORE" button.
This button will turn the Leveling System
OFF and stop any Leveling System operations.
DOWN ARROWS (LOWER BUTTONS):
buttons are used for manually retracting the leveling jacks.
Sides or ends of the vehicle will lower while these buttons are
pushed.
These momentary
1/4" to 1/2" or more.
is not set. The "NOT IN PARK/BRAKE" light will go out when
there are no red WARNING lights ON.
This is a light mounted
separate from the touch panel. It will be ON when any
one or more jacks are extended 1/4" to 1/2" or more.
position.
the ON button is released.

ROOM CONTROL SWITCH:
the room cannot be operated, and the key can be removed.
removed. When the KEY SWITCH is in the "OFF" position
POSITION the room can be operated, and the key cannot be
CONTROL SWITCH. When the KEY SWITCH is in the "ON"
The KEY SWITCH controls power to the ROOMKEY SWITCH: READY TO OPERATE LIGHT:
CONTROL FUNCTIONS
KEY SWITCH
USING. KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING. RETRACT
UNDERSTAND OPERATOR’S MANUAL BEFORE
CAUTION!
ON
LIGHT (AMBER)
READY TO OPERATE
ROOM CONTROL
HYDRAULIC ROOM EXTENSION
OFF EXTEND SWITCH
H
HW
CORPORATION
R
CONTROL IDENTIFICATION
PUMP ON INDICATOR
LIGHT (RED)
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. Releasing
the ROOM CONTROL SWITCH will halt the operation of the
room.
PUMP ON INDICATOR LIGHT: This light will be on when the
pump is running.
This light will flash for 20
seconds while the air seal deflates, after the KEY SWITCH
is turned on. It will then glow steady. The room cannot be
extended or retracted if this light is flashing.
If the "EXCESS SLOPE" light on the leveling system control
panel is on, the READY TO OPERATE light will flash when
the room control switch is pushed to "EXTEND". The room
will not extend. The room will retract if the room control
If the PARK BRAKE is not set, the READY TO OPERATE
light will not turn on and flash when the KEY SWITCH is
turned "ON".
OPERATE light will flash if the KEY SWITCH is in the "ON"
MANUAL or AUTOMATIC operation, the READY TO
position. The room will not operate. The room can be
If a leveling function of the Leveling System is in use,
switch is pushed to "RETRACT".
NOTE: Any time the KEY SWITCH is ON, the network will be
active and will not power down.
operated if the Leveling System is in the "STORE" mode.
12JUL06
MP25.903C
ROOM EXTENSION OPERATOR’S PANEL

MP25.999
5
18MAR2
1
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 three 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 three 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 three or six minutes without allowing the pump motor to cool for
DO NOT run the pump more than three or six minutes without allowing the
DO NOT turn the system
DO NOT continue without allowin
g
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 three 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
GENERAL INSTRUCTIONS
Maintain adequate clearance in all directions for vehicles,
room extensions, doors, steps, etc.. Vehicle may move in any
direction due to raising or lowering of vehicle during leveling,
settling of vehicle, equipment malfunction, etc..
The MASTER WARNING LIGHT will be ON if the
ignition is in the "ON" position and any jack is
extended 1/4" to 1/2" or more.
CAUTION: DO NOT MOVE THE VEHICLE IF A ROOM IS
EXTENDED.
If the Park Brake is not set, the Leveling System cannot
be turned ON and the room extension will not operate.
HWH LIGHTED RESET SWITCH
If the lighted reset switch is on, the switch must be pushed
before any room or the leveling system can be operated.
A network problem with one room will not inhibit the use of
A network problem with the leveling system will not inhibit
the use of the room extensions after the reset switch is
the other rooms or leveling system after the reset switch is
pushed.
pushed.
If the lighted reset switch will not go out when pushed, there
is a problem with the central control module of the network
system. No rooms or the Leveling System will operate.
If a ROOM CONTROL SWITCH is being pushed, the
Leveling System can not be operated. If any Leveling
System leveling function is being operated, no room
control switch will work. The room can be operated if the
If parking on soft ground or asphalt paving, a wood block or
pad should be placed under each jack.
Press the "OFF" button to stop operation of the Leveling
System.
Leveling System is in the STORE mode.
19NOV07
MP35.139C
The HWH lighted reset switch is located on the vehicle
overhead panel. If there is a failure at any time in the HWH
CAN network, the network will shut down. The leveling
system and all room extensions will not operate. If the ignition
is off, no indicator lights will come on. If the ignition is in the
"ON" or "ACC" position, the lighted reset switch and the
MASTER WARNING Light will come on.

OPERATING PROCEDURES
PREPARATION FOR TRAVEL
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.
CAUTION:DO NOT RELY SOLELY UPON THE
WARNING LIGHTS. IT IS THE OPERATOR’S
RESPONSIBILITY TO CHECK THAT ALL JACKS ARE IN
THE STORE/TRAVEL POSITION AND THAT THE ROOM
EXTENSION IS FULLY RETRACTED BEFORE TRAVELING.
If the jacks and room extension are fully retracted but a red
WARNING light is lit or the green "TRAVEL MODE" light is
not lit, the system needs to be serviced.
NOTE: An extended jack can turn the green
MASTER WARNING light on.
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.
AUTOMATIC HYDRAULIC LEVELING
1. Place the transmission in the recommended position for
parking the vehicle and set the parking brake. Turn the
ignition to the "ACCESSORY" or "ON" position.
2. Press the "I" button to enter the hydraulic operation mode.
The LEVELING SYSTEM ACTIVE light will glow steady.
NOTE: The operator may want to check the jacks at
this time and place a pad under each jack if the ground
3. Press the "I" button a third time. The LEVELING SYSTEM
ACTIVE light will start to flash. The system will automatically
extend the jacks according to lit yellow LEVELING LIGHTS
to level the vehicle and then stabilize the vehicle by extending
any remaining jacks until they touch the ground lifting the
vehicle slightly. After the system has finished leveling and
stabilizing, it will automatically shut off.
EXCESS SLOPE SITUATION:In the event that the jacks are
unable to level the coach, the "EXCESS SLOPE" indicator
light will come on. The pump will shut off. The system will
shut off. The system will NOT stabilize the vehicle if the
"EXCESS SLOPE" light comes on. Store the jacks according
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 HYDRAULIC OPERATION section.
The "EXCESS SLOPE" light will be on whenever the network
is active until the vehicle is leveled with all yellow LEVEL
INDICATOR lights off.
4. Turn the vehicle ignition switch to the "OFF" position.
MP35.183C
12JUL06
will not support the vehicle. NOTE: The room extension can not be extended if the
"EXCESS SLOPE" light is on, but it can be retracted.
"TRAVEL MODE" light off and turn the

OPERATING PROCEDURES
It is recommended that the vehicle is leveled
1. The park brake must be set for the room to be operated.
If the "EXCESS SLOPE" light on the touch panel is on, the
room cannot be extended.
CAUTION:KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING.
NOTE: Make sure there is adequate clearance to fully
extend the room and that all storage doors are closed.
2. Insert the KEY into the KEY SWITCH on the room
extension operator’s panel and turn it to the "ON" position.
The READY TO OPERATE light will flash. When the amber
light is on steady the room can be operated. light on the Leveling System panel is ON. The room
the room control switch is pushed if the "EXCESS SLOPE"
room will not extend. If the room panel KEY SWITCH is
NOTE: The READY TO OPERATE light will flash when
IMPORTANT: IF EITHER SIDE OF THE ROOM STOPS
MOVING, RELEASE THE ROOM CONTROL SWITCH
4. Turn the KEY SWITCH to the "OFF" position and remove
the key. The READY TO OPERATE light will go out. The air
IMMEDIATELY. THE ROOM OPERATION WILL HALT.
NOTE: Anytime the KEY SWITCH is on, the room air seal
seal will inflate.
will deflate.
on, the "READY TO OPERATE" light will flash while the
Leveling System is being operated.
NOTE: If the Leveling System is being operated, the NOTE: If the KEY SWITCH is left "ON" the air seal
will not inflate and the Network will stay active and not
DO NOT FORCE THE ROOM. DO NOT REVERSE
DIRECTION OF THE ROOM. BINDING OF ROOM CAN
CAUSE ROOM DAMAGE. CONTACT HWH CORPORATION
CUSTOMER SERVICE FOR ASSISTANCE.
NOTE: Under normal operation of the room, the direction
of movement should not be reversed. If the movement of
the room must be reversed, do not try to re-extend the
room until the room has been fully retracted.
power down.
will not extend.
ROOM EXTEND PROCEDURE
3. To extend the room push and hold the ROOM CONTROL
SWITCH in the "EXTEND" position. The red PUMP ON light
12JUL06
MP35.243C
before extending a room.
will come on. Hold the ROOM CONTROL SWITCH to
"EXTEND" for approximately five seconds after the room
is fully extended. This assures proper pressurization of
the cylinders. The red "PUMP ON" light will go out when
the ROOM CONTROL SWITCH is released.

OPERATING PROCEDURES
ROOM RETRACT PROCEDURE
14JUL06
MP35.335C
extensions before retracting the jacks.
System is being operated. If the leveling system is in
READY TO OPERATE light will flash while the Leveling
will not retract. If the room panel KEY SWITCH is ON, the
NOTE: If the Leveling System is being operated, the room
IMPORTANT: It is recommended to retract room
will flash. When the amber light is on steady the room can
The air seal will deflate. The READY TO OPERATE light
extension operator’s panel and turn it to the "ON" position.
2. Insert the KEY into the KEY SWITCH on the room
1. The park brake must be set for the room to be operated.
CLEAR OF ROOM WHEN OPERATING.
be operated.
CAUTION: KEEP PEOPLE AND OBSTRUCTIONS
room until the room has been fully extended.
the room must be reversed, do not try to retract the
movement should not be reversed. If the movement of
NOTE: Under normal operation the direction of
IMPORTANT: IF EITHER SIDE OF THE ROOM STOPS
MOVING, RELEASE THE ROOM CONTROL SWITCH
IMMEDIATELY. THE ROOM OPERATION WILL HALT.
DO NOT FORCE THE ROOM. DO NOT REVERSE
DIRECTION OF THE ROOM. BINDING OF ROOM CAN
CUSTOMER SERVICE FOR ASSISTANCE.
CAUSE ROOM DAMAGE. CONTACT HWH CORPORATION
NOTE: If the KEY SWITCH is left "ON" the air seal will
not inflate and the Network will stay active and not
SERVICE AT 1-800-321-3494 FOR ASSISTANCE.
RETRACT, CONTACT HWH CORPORATION CUSTOMER
IN THE EVENT OF THE FAILURE OF THE ROOM TO
the key. The READY TO OPERATE light will go out. The air
4. Turn the KEY SWITCH to the "OFF" position and remove
power down.
seal will inflate.
"STORE" mode, the room can be operated.
the ROOM CONTROL SWITCH is released.
the cylinders. The red "PUMP ON" light will go out when
is fully retracted. This assures proper pressurization of
"RETRACT" for approximately five seconds after the room
light will come on. Hold the ROOM CONTROL SWITCH to
SWITCH in the "RETRACT" position. The red PUMP ON
3. To retract the room push and hold the ROOM CONTROL

OPERATING PROCEDURES
MP35.372C
12JUL06
CAUTION:
IMPORTANT:
JACK RETRACTION
THE OPERATOR MUST BE SURE THAT
THERE ARE NO OBJECTS UNDER THE VEHICLE AND
THAT ALL PEOPLE ARE CLEAR OF THE VEHICLE.
DO NOT interrupt power to the leveling
system while the "STORE" indicator light is blinking.
DO NOT push the "OFF" button. The system must be allowed
4. If jacks cannot be retracted by the above procedure see
MANUAL JACK RETRACTION Section.
to completely finish the store mode. If the engine was started
2. Press the "STORE" button. The store indicator light will
flash. As each jack retracts, its red WARNING light will go
1. Turn the ignition switch to "ON", "ACC", or start the engine.
Press the "I" button one time. The "I" indicator light will glow
steady.
out. The vehicle can be moved as soon as the red WARNING
lights are out and the green "TRAVEL" light is on, providing
the jacks are in the STORE/TRAVEL position.
before putting the system in the store mode, the vehicle may
be moved when the jacks are in the STORE/TRAVEL position.
This will not interrupt the store procedure.
3. The system will automatically shut down six 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 (30) minutes, then shut down
regardless of the "WARNING" lights condition.
THE STORE/TRAVEL POSITION BEFORE TRAVELING.
RESPONSIBILITY TO CHECK THAT ALL JACKS ARE IN
WARNING LIGHTS. IT IS THE OPERATOR’S
CAUTION: DO NOT RELY SOLELY UPON THE
NOTE: If the ROOM CONTROL SWITCH is pushed while
the Leveling System is in the "STORE" mode, the STORE
procedure is interrupted until the ROOM CONTROL SWITCH
is released. If the four red WARNING lights are all out, the
STORE light will continue to blink for six minutes, then the
system will shut off.
MANUAL HYDRAULIC OPERATION
"ACCESSORY" or "ON" position.
the vehicle, and set the parking brake. Turn the ignition to the
SENSING light is on, that side or end of the vehicle is low.
buttons on the right half of the panel. If a yellow LEVEL
3. The vehicle may be leveled using the manual EXTEND
2. Press the "I" button. The indicator light will glow steady.
1. Place transmission in the recommended position for parking
Do not continue to push an EXTEND button
leveling panel and turn the ignition switch to the "OFF"
4. When leveling is completed, push the "OFF" button on the
for more than ten (10) seconds after that pair of jacks are
leveling can be extended to the ground. This provides
Any jack not used for
additional stability against wind and activity in the vehicle.
fully extended.
IMPORTANT:
Jacks will extend (or retract) in pairs to raise (or lower) a side
or end of the vehicle.
Level the vehicle side to side, if necessary, before
leveling the vehicle front to rear.
position.
NOTE: As the jacks extend 1/4" to 1/2" the
red warning light for the jack will come on.
STORE/TRAVEL POSITION
JACK POSITIONS
EXTENDED POSITION

OPERATING PROCEDURES
(4 Jack Systems with Valve Release Nuts)
MANUAL JACK RETRACTION
4. Retract the rear jacks by opening the two outer valves.
Slowly turn the valve release nuts counter clockwise using
the 1/4" nut driver supplied.
4 and 1/2 turns. Turning the nuts more could damage
the jacks. DO NOT turn the release nuts more than
IMPORTANT: Only open the valves enough to retract
the 1/4" nut driver supplied.
Slowly turn the valve release nuts counter clockwise using
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 (4) valve release nuts on the solenoid valves.
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 jacks for travel.
the "STORE" button on the control panel will not retract
NOTE: Use the Valve Release Nuts for retracting only if
the valves.
assembly.
CAUTION:KEEP AWAY FROM THE WHEELS,
VALVE ASSEMBLY
POWER UNIT
7. The system should now be repaired before using again.
IMPORTANT: Once the valve release nuts are snug,
DO NOT tighten the nuts past this point as internal
6. Close the valves by turning the valve release nuts
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
BREATHER CAP
damage may occur to the solenoid.
clockwise.
NUT
VALVE
RELEASE
MP35.911C
12JUL06

MAINTENANCE
MP45.241C
19NOV07
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 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.

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.
07MAY09
MP45.3259
SENSING UNIT ADJUSTMENT
adjustments first, then hold the adjustment nut from moving
while making the A-C adjustment.
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.
MP44.1501
(OLD STYLE)
NUT (7/8" or 3/4")
ADJUSTMENT
NUT (5/16" OLD) - (1/2" NEW)
ADJUSTMENT
ADJUSTMENT
SCREW (Phillips or 1/4")
CONTROL BOX - SIDE VIEW
ADJUSTMENT NUT (5/16" OLD) - (1/2" NEW)
ADJUSTMENT NUT (7/8" or 3/4")
MAY BE DIFFERENT
LED’S - LOCATION
ADJUSTMENT SCREW (Phillips or 1/4")
SENSING UNIT - TOP VIEW
D
A
B
(OLD STYLE)
C
CONTROL
BOX WALL
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
SENSING UNIT MAINTENANCE/SERVICE

BREATHER CAP - DIPSTICK - 1/4" NUT DRIVER
MP85.999X
20JAN10
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.
turns counter clockwise. Damage
NOTE: DO NOT turn the valve
release nut more than 2 full
PLASTIC PLUG
REMOVE TO
GAIN ACCESS
TO THE 1/4"
VALVE RELEASE
NUT
SOLENOID VALVE
2 1/4" DIAMETER