HWH 2000 SERIES User manual

H
CORPORATION
H
W
R
SLOPE
EXCESS
NOT IN
PARK/
BRAKE
TRAVEL
CAUTION!
COMPUTERIZED LEVELING
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
OFF RAISE
STORE DUMP
LEVEL
HYD AIR
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
AP46142
Straight-Acting Jacks
Air Leveling
FEATURING:
BI-AXIS Hydraulic Leveling
Touch Panel Leveling Control
R
HWH COMPUTER - CONTROLLED
2000 SERIES LEVELING SYSTEM
OPERATOR’S MANUAL
R
ML46143/MP04.3948
01MAR10
MODE

WARNING !
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
MP14.0010
07APR08
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
IMPORTANT: IF COACH IS EQUIPPED WITH A ROOM EXTENSION, READ ROOM EXTENSION SECTION BEFORE
OPERATING LEVELING SYSTEM.
DO NOT USE THE DUMP OR RAISE BUTTONS IF THE VEHICLE IS MOVING IN EXCESS OF 5 MPH.
KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE LEVELING SYSTEM AND ROOM EXTENSION ARE BEING OPERATED.
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.
DO NOT TRAVEL IF THE VEHICLE IS NOT AT THE PROPER RIDE HEIGHT. CONTACT MANUFACTURER
TECHNICAL SERVICE FOR TRAVELING WHEN NOT AT THE PROPER RIDE HEIGHT.

CONTROL IDENTIFICATION
MP24.3421
01MAR10
"EXCESS SLOPE"
LIGHT "NOT IN PARK" LIGHT
HYDRAULIC OPERATION
LIGHT
"LEVEL HYD" BUTTON
"STORE" BUTTON
"DUMP" BUTTON
"OFF" BUTTON
"TRAVEL MODE"
LIGHT
LOWER FRONT BUTTON
RAISE FRONT BUTTON
WARNING LIGHTS
(4-Red)
RAISE RIGHT SIDE BUTTON
LOWER RIGHT SIDE BUTTON
LEVELING LIGHTS
(4-Yellow)
RAISE REAR BUTTON
LOWER REAR BUTTON
STORE LIGHT
RAISE LEFT SIDE
BUTTON LOWER LEFT SIDE BUTTON
CONTROL FUNCTIONS
CONTROL BUTTONS
SLOPE
EXCESS
NOT IN
PARK/
BRAKE
TRAVEL
CAUTION!
COMPUTERIZED LEVELING
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
OFF RAISE
STORE DUMP
LEVEL
HYD AIR
"RAISE" BUTTON
RAISE LIGHT
"LEVEL AIR" BUTTON
AIR OPERATION LIGHT DUMP
LIGHT
IMPORTANT:
hydraulic or air operation.
by exhausting air from the suspension system.
by adding air to the suspension system.
LOWER BUTTONS (DOWN ARROWS):
AIR OPERATION LIGHT:
HYDRAULIC OPERATION LIGHT:
STORE LIGHT:
RAISE LIGHT:
DUMP LIGHT:
"OFF" BUTTON:
"LEVEL HYD" BUTTON:
"STORE"BUTTON:
"LEVEL AIR" BUTTON:
"DUMP" BUTTON:
"RAISE" BUTTON:
RAISE BUTTONS (UP ARROW):
Push the "OFF" button to stop the
This button is used to automatically
This button will lower the whole vehicle
This button will raise the whole vehicle
system is active in the HYDRAULIC LEVELING mode. This
is pushed.
is pushed.
This is a system active and
automatic operation button for hydraulic leveling.
automatic operation button for air leveling.
This light will flash indicating the hydraulic
system is in the STORE mode.
READ "DUMP" AND "RAISE" FUNCTIONS
SECTION CAREFULLY.
These are
momentary buttons used for manually operating the air or
hydraulic leveling systems. Sides or ends of the vehicle will
lower while these buttons are pushed in manual Air Leveling.
This light indicates the
This light indicates the system is
This light will flash when the "DUMP" button
This light will flash when the "RAISE" button
These momentary buttons
are used for manually operating the air or hydraulic leveling
systems. Sides or ends of the vehicle will raise while these
buttons are pushed.
This is a system active and
retract the jacks into the STORE/TRAVEL position. It will also
return the system to the travel mode if air leveling was used.
MODE
INDICATOR LIGHTS
The jacks will retract when in manual Hydraulic Leveling.
light will flash during a leveling procedure.
active in the AIR LEVELING mode. This light will flash during
a leveling procedure.
Pushing OFF will not put
the system in the TRAVEL MODE.

CONTROL IDENTIFICATION
MP24.3422
01MAR10
CONTROL FUNCTIONS (CONT’D)
INDICATORS (CONT’D)
on if the leveling system can NOT level the vehicle.
the "AIR" or "HYD" button is being pushed and the park brake
is not set, provided the ignition is in the "ON" position.
inch or more, the respective red WARNING light will be on,
if the HYDRAULIC OPERATION indicator light is on. If the
AIR OPERATION indicator light is on and the ignition is in the
"ON" position all four red warning lights will be on.
indicator lights. A lit LEVEL indicator light indicates a side,
end or corner of the vehicle is low. These lights can be on
only if the AIR or HYDRAULIC indicator lights are on. Only
one or two LEVEL indicator lights can be on at once. When
all LEVEL indicator lights are out the vehicle is level.
ignition is in the "ON" position and a jack is extended 1 inch
or more, or if a suspension air bag has low air pressure.
is in the "ON" position and a jack is extended 1 inch or more,
or if a suspension air bag has low air pressure.
on if the ignition is "ON" and the Master Warning light is off.
"EXCESS SLOPE" INDICATOR LIGHT:
"TRAVEL MODE" INDICATOR LIGHT:
"NOT IN PARK" INDICATOR LIGHT:
WARNING INDICATOR LIGHTS:
LEVEL INDICATOR LIGHTS:
MASTER WARNING LIGHT:
WARNING BUZZER:
This light will be
This light will be
This light will be on if
When a jack is extended 1
There are four yellow LEVEL
This light will be on if the
The buzzer will sound if the ignition
exceeding 5 MPH if the "DUMP" or "RAISE" buttons are
NOTE: The vehicle can be moved at speeds not
HWH LIGHTED RESET SWITCH
before the leveling system can be operated.
If the lighted reset switch is on, the switch must be pushed
"ACC" position, the lighted reset switch and the
indicator lights will come on. If the ignition is in the "ON" or
leveling system will not operate. If the ignition is off, no
in the HWH CAN network, the network will shut down. The
located on the vehicle dash. If there is a failure at any time
The HWH system has a lighted reset switch that is normally
THE VEHICLE CAN RETURN TO RIDE HEIGHT
POSITION AND THE LIGHTED RESET SWITCH IS ON,
IF THE IGNITION IS IN THE "ON"
suspension will return to the travel mode if the ignition key
system. The Leveling System will not operate. The vehicle
is a problem with the central control module of the network
If the lighted reset switch will not go out when pushed, there
is in the "ON" position.
WITHOUT RELEASING THE PARK BRAKE.
CAUTION:MASTER WARNING Light will come on.
MASTER WARNING INDICATORS
If the HWH buzzer and light are on when ready to travel,
possible problems should be checked and corrected
before proceeding.
If the HWH buzzer and light come on briefly while traveling,
possible problems should be checked when convenient,
but it is not necessary to stop traveling when the warning
buzzer and light do not stay on.
If the HWH buzzer and light come on and stay on, the
vehicle should be pulled over as soon as it is safe to do so.
Any problem found should be corrected before continuing.
It is not recommended to stop on a traveled portion of the
road or anywhere that does not have adequate room to
safely inspect the vehicle.
If a problem that could create a driving hazard is not found,
proceed with caution. The problem may be a faulty indicator
or warning switch. If a driving hazard is found, the problem
should be corrected before traveling. When in doubt, contact
the vehicle manufacturer or HWH customer service for
assistance.
being used. The TRAVEL MODE LIGHT will be off.
The HWH Master Warning light and Buzzer are used to
indicate a jack has not been retracted or has extended
slightly due to thermal expansion, the air pressure in any
suspension air bag drops below 20 psi or the system air
pressure drops below 85 psi. When the Master Warning
light and Buzzer are on the Travel Mode Light will be off. A
jack that extends slightly does not create a driving hazard. A
jack that remains extended more than several inches or low
air pressure can create a driving hazard.

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
MP34.0223
01MAR10
AIR LEVELING LOCK OUT
Computerized or manual air leveling functions cannot be
used if hydraulic functions have been used and any jacks
are extended.
If any jacks are extended and the "AIR" button is pushed,
the individual red warning light(s) for the jack(s) extended
will flash for 10 seconds. Hydraulic functions will still
operate while the light(s) are flashing.
manual down arrows can be used to retract the jacks.
retracted with the warning lights off. The "STORE" button or
The "AIR" button will not function until all jacks are fully
PREPARATION FOR TRAVEL
GENERAL INSTRUCTIONS
Start the vehicle’s engine and allow air pressure to build to
or the park brake must be released before the vehicle can return
If air leveling was used, the "STORE" button must be pushed
The "TRAVEL" light on the leveling panel must be on.
Check that the generator slide is fully retracted.
Before traveling, the MASTER WARNING light and buzzer
Also check that the vehicle’s suspension is at the proper height
Visually check that the jacks are in the STORE/TRAVEL position.
recommended level for traveling.
for travel.
must be off.
to travel height.
air suspension can return to travel height.
The ignition switch must be "ON" before the vehicle’s
and a leveling system was used.
allow the vehicle to return to travel height if the ignition is on
Pushing the "STORE" button or releasing the park brake will
system will return to travel height.
released. The system will shut off and the vehicle suspension
hydraulic leveling will be stopped anytime the park brake is
is pressed. If the ignition is in the "ON" position, either air or
system will not turn on when either the "AIR" or "HYD" button
set, the "NOT IN PARK/BRAKE" light will come on, and the
If the ignition is in the "ON" position and the park brake is not
Press the "OFF" button at any time to stop the operation of the
placed under the jacks for hydraulic leveling.
If parking on soft ground or asphalt paving, pads should be
NOTE:
system. The vehicle will not return to TRAVEL MODE.
DO NOT MOVE THE VEHICLE WHILECAUTION:
PROPER RIDE HEIGHT AND THE SLIDE-OUT IS FULLY
TO VISUALLY CHECK THAT THE VEHICLE IS AT THE
IT IS THE OPERATOR’S RESPONSIBILITY
VISUALLY CHECK THAT ALL JACKS ARE FULLY
LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY TO
HAZARD. DO NOT RELY SOLELY UPON WARNING
JACKS AND OR THE VEHICLE AND CREATE A DRIVING
EXTENDED CAN CAUSE SEVERE DAMAGE TO THE
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
RETRACTED BEFORE MOVING THE VEHICLE.
CAUTION:
WARNING LIGHT OR BUZZER IS ON, OR IF THE ROOM
DO NOT MOVE THE VEHICLE IF A
pressure if the ignition is in the "ON" position.
is extended two inches or more or if an air bag has low air
The MASTER WARNING light and buzzer will be on if a jack
and park brake off if the ignition is in the "ON" position. See
The "DUMP" and "RAISE" buttons will function with the system
Air and hydraulic leveling can not be used simultaneously.
AIR DUMP AND RAISE FUNCTIONS.
EXTENSION IS EXTENDED. (SEE "MASTER WARNING
CAUTION:
INDICATORS")
RETRACTED INTO THE STORE POSITION.

MP34.2715
01MAR10
AUTOMATIC HYDRAULIC LEVELING
CAUTION:
IMPORTANT: DO NOT interrupt power to the leveling
1. Place transmission in the recommended position for
parking vehicle and set parking brake. Turn the coach
engine off. Turn the ignition to the "ACCESSORY" position.
2. Press the "HYD" button to enter the hydraulic operation
mode. The ON light above the "HYD" button will glow steady.
3. At this time, the operator may want to check the jacks
and place pads under the jacks if the ground will not
4. Press the "HYD" button a second time.
The ON light will start to flash.
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, and has
completed the air dump cycle, it will automatically shut off.
5. Turn the ignition switch to the "OFF" position.
JACK RETRACTION
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 "STORE" indicator light is blinking.
DO NOT push the "OFF" button or turn the ignition key.
4. 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 system must be allowed to completely finish the
3. The vehicle can be moved as soon as the red warning
lights are out, the jacks are in the STORE/TRAVEL position,
the green "TRAVEL MODE" light is on, and the suspension
air bags are inflated to the vehicles proper ride height.
THE STORE/TRAVEL POSITION AND THE VEHICLE IS AT
THE PROPER RIDE HEIGHT.
NOTE: After pushing the "HYD" button a second time,
the system will begin to dump air from the vehicle
1. Start the engine.
OPERATING PROCEDURES
support the vehicle.
leveling process will begin.
suspension. After approximately 25 seconds, the
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 extending 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 not be extended. The system will shut off
leaving the "EXCESS SLOPE" light on. The "EXCESS
SLOPE" light will remain on if the ignition is in the "ON" or
"ACC" position, until the jacks have been fully retracted
turning the red warning lights out. Push the "STORE" button
to retract the jacks. Move the vehicle to a more level position
or level the vehicle as close as possible according to the
MANUAL HYDRAULIC OPERATION section.
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.
STORE mode.
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.
2. Press the "STORE" button. The store indicator light will
flash. Air will be pumped into the vehicle suspension for 10
seconds before the jacks start to retract and the system goes
into the TRAVEL MODE. The two front jacks will retract for
approximately 5 seconds before the rear jacks start to retract.
As each jack retracts, its red WARNING light will go out. The
system will automatically shut down one minute 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 until the ignition is turned off. The panel will remain on
in the STORE mode for ten minutes after the ignition is
NOTE: If the vehicle is parked or stored with the jacks
extended for an extended period of time and the jacks
fail to retract completely, extend the jacks back down
to the ground then retract the jacks again.
turned off. After ten minutes the panel will turn off.

OPERATING PROCEDURES
MP34.3020
01FEB10
IMPORTANT: Do not continue to push an EXTEND
MANUAL HYDRAULIC OPERATION
1. Place transmission in the recommended position for parking
2. Press the "HYD" button. The indicator light will glow steady.
3. Place pads under the jack feet if the ground will not support
the vehicle on the jacks.
5. The vehicle may be leveled using the manual EXTEND
(UP ARROW) buttons on the right half of the panel. If a yellow
LEVEL SENSING light is on, that side or end of the vehicle is
Jacks will extend (or retract) in pairs to raise (or lower) a side
or end of the vehicle. Any jack not used for leveling can be
extended to the ground. This provides additional stability
button for more than ten (10) seconds after that pair of
6. When leveling is completed, push the "OFF" button on the
touch panel and turn the ignition switch to the "OFF" position.
against wind and activity in the vehicle. Jacks used to
the vehicle, and set the parking brake. Turn the ignition to the
"ACCESSORY" position.
jacks are fully extended.4. Push the "DUMP" button. Wait until all of the air is
exhausted from the vehicles suspension system.
when manual operation of the leveling system is used.
IMPORTANT: Push the "STORE" button before traveling
stabilize the vehicle after leveling is complete should lift the
vehicle slightly after touching the ground.
low. It is best to level the vehicle side to side first, if needed,
before front to rear.

OPERATING PROCEDURES
MP34.3302
01MAR10
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.
WARNING:KEEP AWAY FROM THE WHEELS,
point as internal damage may occur to the solenoid.
incorporated into the Breather Cap. Before using read
NOTE: As of APRIL 2002 a 1/4" Nut Driver has been
and understand the last page of this manual.
6. Check that all jacks are now retracted. If yes, continue.
7. Close the valves by turning each valve release clockwise.
DO NOT tighten the manual valve release past this
IMPORTANT: Once the manual valve release is snug,
8. The system should now be repaired before using again.
3. Using the diagram below identify the style
5. Repeat the process by identifying then opening
the two outer valves, if applicable.
LARGE STYLE
WITH T-HANDLE
VALVE RELEASE
SMALL STYLE
WITH VALVE
RELEASE NUT
LARGE STYLE
RELEASE NUT
WITH VALVE
PLASTIC PLUG
BREATHER
CAP
Small style with Valve Release Nut: DO NOT
1/4" valve release nut more than . Turning
the nut more could damage the valve.
The T-Handle
turn the
jack functions. (Valve styles and arrangements will vary)
POWER UNIT-MANIFOLD ASSEMBLY
MANIFOLD
of your two center valves.
If no, notify the dealership where you purchased the vehicle
or had the leveling system installed or contact
(The diagram below represents a typical Power Unit-
MANUAL JACK RETRACTION
extensions are fully retracted prior to performing
IMPORTANT: HWH recommends that all HWH room
manual jack retraction procedures.
Manifold Assembly it may not be an exact match to yours). 4. Retract the front jacks by opening the two center valves. Slowly turn the manual valve releases counter clockwise
until the jacks start to retract.
4 and 1/2 turns
HWH Corporation customer service.
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
MP35.384N

OPERATING PROCEDURES
MP34.3403
03MAR10
AUTOMATIC AIR OPERATION
the ignition is in the "ON" or "ACC" position, the four red
will begin. The system will first exhaust air from all the air
SYSTEM ACTIVE LIGHT will start flashing and air leveling
3. Press the "AIR" button a second time. The LEVELING
vehicle should not be moved when these lights are on.
that the height control valves have been locked out. The
WARNING lights on the panel will come on. This indicates
LEVELING SYSTEM ACTIVE LIGHT will glow steady. When
2. Press the "AIR" button once to enter the air mode. The
"NOT IN PARK/BRAKE" light will be on while the "AIR"
the panel will not turn on if the park brake is not set. The
required for leveling.
will level with the engine shut off, however more time will be
This will provide a better air supply for leveling. The vehicle
Leaving the engine running during leveling is recommended.
turned on if the ignition is in the "ON" or "ACC" position.
and set the park brake. The air leveling system can only be
1. Place the transmission in the proper position for parking
started, the ignition can be moved to the "OFF" position
position to use the "AIR" button. Once the operation is
button is being pushed.
NOTE: If the ignition key is in the "ON" or "ACC" position,
NOTE: The ignition must be in the "ON" or "ACC"
4. When all four yellow level lights are out, the LEVELING
SYSTEM ACTIVE LIGHT will stop flashing and start pulsating
dimly. The Leveling System is now in the SLEEP MODE.
NOTE: After the ignition and all room extension KEY
SWITCHES are turned OFF, the CAN Network stays active
for 10 minutes before shutting down. Leveling System
and the operation will continue. All jacks must be fully
NOTE: Only one or two yellow LEVEL SENSING lights
may be ON at one time.
The vehicle’s engine/ignition may now be turned OFF.
touch panel lights will stay ON during this time and go
out when the CAN Network shuts down. If the Leveling
System is in the SLEEP MODE when the Network shuts
down, the computer will stay ON. The Leveling System
touch panel lights will all be OFF, but the Leveling
System will still be in the SLEEP MODE.
5. 30 minutes after the Leveling System enters the SLEEP
MODE, the computer will monitor the LEVELING SENSING
UNIT for one minute. If no leveling is needed, the computer
will continue to monitor the LEVELING SENSING UNIT
every 30 minutes. No light will be seen on the Touch Panel.
6. If the vehicle needs to be re-leveled, the CAN Network will
become active. The Leveling System touch panel lights will
come ON during the leveling procedure. The LEVELING
SYSTEM ACTIVE LIGHT will flash. One or two yellow
LEVELING LIGHTS will be ON. When the yellow LEVELING
LIGHTS are all out, the LEVELING SYSTEM ACTIVE LIGHT
will stop flashing and start pulsating dimly. The Leveling
System will remain in the SLEEP MODE with the computer
monitoring the LEVELING SENSING UNIT every 30 minutes,
re-leveling the vehicle as needed.
"ON" position.
pushed or the park brake is released, if the ignition is in the
7. The SLEEP MODE will continue until the "OFF" button is
system re-levels the vehicle.
the touch panel lights OFF. This happens every time the
after re-leveling the vehicle and then shut down, turning
NOTE: The CAN Network will stay active for 10 minutes
is active until the vehicle is leveled with all yellow LEVEL
The "EXCESS SLOPE" light will be on whenever the network
out. The "EXCESS SLOPE" light will be on whenever
light will come on. The LEVEL LIGHT indicator light will go
if a LEVEL SENSING light is still on, the "EXCESS SLOPE"
vehicle for approximately 30 minutes. After the 30 minutes,
The system will attempt to level the
the network is active.
indicator lights off.
EXCESS SLOPE:
The system will only return to the TRAVEL MODE if the
"STORE" button is pushed or the park brake is released.
In either case, the ignition key must be in the "ON"
position.
retracted to use the "AIR" button.
bags to lower the vehicle. The system will then add air to
bags to raise the low side first, if needed, then raise the
low end, if needed.
If no yellow level lights are on when the air button is pushed
the second time, the system will still exhaust all air from all
the air bags. If a yellow light is on after the air has been
exhausted, the system will level the vehicle by adding air
to the necessary air bags to turn the yellow lights off. If no
yellow lights are on after the air is exhausted, the system
will go directly into the sleep mode.