HWH 2000 SERIES User manual

HWH COMPUTER-CONTROLLED
OPERATOR’S MANUAL
DUMP
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
CAUTION!
NOT IN
TRAVEL
EXCESS
SLOPE
PARK/
BRAKE
RAISE
AIR
HWH COMPUTERIZED LEVELING
2000 SERIES
LEVELING SYSTEM
08MAR07
ML40383/MP04.3940
TRAVEL
EMERGENCY
STOP
MODE
MODE
www.hwh.com
Ph: 800/321-3494 (or) 563/724-3396 | Fax: [phone]
2096 Moscow Road | Moscow, Iowa 52760
(On I-80, Exit 267 South)
HWH CORPORATION
Multiple Room Extensions (With Air Seals)
FEATURING:
Air Leveling (With Tag Axle Lift)
Touch Panel Leveling Control
CORPORATION
W
HH
R
Generator Slide
AP40382

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
MP14.0006
03FEB10
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 OPERATE THE LEVELING SYSTEM OR 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.

CONTROL IDENTIFICATION
"EMERGENCY STOP" BUTTON
"EXCESS SLOPE"
"NOT IN PARK"
RAISE RIGHT SIDE BUTTON
LOWER RIGHT SIDE BUTTON
LEVELING LIGHTS
(4 - Yellow)
WARNING LIGHTS
(4 - Red)
RAISE REAR BUTTON
LOWER REAR BUTTON
"AIR" (ON) BUTTON
DUMP LIGHT
"TRAVEL MODE" BUTTON
"TRAVEL MODE"
This button will lower the whole coach by
dumping air from the suspension system.
This button will raise the whole coach
by adding air to the suspension system.
ON if the leveling system
can NOT level the coach.
CONTROL BUTTONS
MP24.3420
08MAR07
CONTROL FUNCTIONS
LEVELING SYSTEM
"DUMP" BUTTON
RAISE LEFT SIDE
BUTTON
LOWER LEFT SIDE
BUTTON
RAISE FRONT BUTTON
LOWER FRONT BUTTON
Flashes when "RAISE" button is pushed.
"AIR" BUTTON:
"DUMP" BUTTON:
"RAISE" BUTTON:
UP ARROWS (RAISE BUTTONS):
DOWN ARROWS (LOWER BUTTONS):
IMPORTANT:
DUMP LIGHT:
RAISE LIGHT:
"EXCESS SLOPE" LIGHT:
WARNING LIGHTS:
LEVELING LIGHTS:
"NOT IN PARK/BRAKE" LIGHT:
LIGHT
LIGHT
Flashes when "DUMP" button is pushed.
This is the system active and automatic
operation button. It works if the ignition is in the "ON" position.
These momentary
buttons are used for manually operating the air leveling
systems. Sides or ends of the vehicle will lower while these
buttons are pushed.
One or two yellow lights can be on
indicating the side, end or corner of the coach is low.
Function with the ignition in the
"ON" position. ON when the LEVELING SYSTEM ACTIVE
LIGHT is ON. See PREPARATION FOR TRAVEL.
Read "DUMP AND RAISE FUNCTIONS"
before using the "DUMP" or "RAISE" buttons.
CAUTION!
HWH COMPUTERIZED LEVELING
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
NOT IN
PARK /
BRAKE
DUMP
RAISE
EMERGENCY
STOP
AIR
TRAVEL
TRAVEL
EXCESS
SLOPE
RAISE LIGHT
"RAISE" BUTTON
"EMERGENCY STOP" BUTTON: This button turns the
"RAISE" buttons. Pushing this button will NOT put the system
system OFF but does NOT control power to the "DUMP" or
"TRAVEL MODE" BUTTON:
LEVEL SYSTEM ACTIVE LIGHT: ON when the system is
active, and flashes during automatic leveling.
"TRAVEL MODE" LIGHT (GREEN):
INDICATOR LIGHTS
"TRAVEL MODE" BUTTON LIGHT (RED):
This button will put the Leveling
System in the TRAVEL mode. The ignition must be "ON" for
ON if the ignition is in
the "ON" position, the system is not being used, and there is
sufficient air pressure in the suspension.
"TRAVEL MODE" BUTTON
LIGHT (Red)
Light flashes
for 3 seconds after the "TRAVEL MODE" button is pushed.
the vehicle to return to proper ride height for traveling.
ON while the "AIR" button
is being pushed if the Park Brake is NOT set. The light will go
out when the "AIR" button is released.
HARD RESET SWITCH
(SEE HWH LIGHTED RESET SWITCH)
MASTER WARNING LIGHT
These momentary
buttons are used for manually operating the air leveling
systems. Sides or ends of the vehicle will raise while these
buttons are pushed.
ACTIVE LIGHT
LIGHT (Green)
MODE
MODE
in the TRAVEL mode.
See PREPARATION FOR TRAVEL.
ON any time the
MASTER WARNING LIGHT:
"TRAVEL" light is not ON, if the ignition is in
the "ON" position.

08MAR07
MP24.4561
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
ROOM EXTENSION OPERATOR’S PANEL
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. Except for EXCESS
SLOPE situations, the room cannot be extended or
If the "EXCESS SLOPE" light on the leveling system
control panel is on, the READY TO OPERATE light will flash
continously after the key switch is turned ON. 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".
MASTER WARNING LIGHT
This light is on the dash, separate from the control panels.
It can be on only if the ignition key is in the "ON" position. The light will be on if a HWH low air pressure switch is on,
the TRAVEL mode, or if a room in limit switch is not made.
OPERATE light will flash if the KEY SWITCH is in the "ON"
use, MANUAL or AUTOMATIC operation, the READY TO
position. The room will not operate.
If a RAISE or LOWER function of the Leveling System is in
if the Leveling System is on, if the Leveling System is not in
switch is pushed to "RETRACT".
NOTE: Any time the KEY SWITCH is ON, the network will
be active and will not power down.
PUMP ON STEADY / READY TO
FLASH / WAIT
OPERATE
retracted if this light is flashing.

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
MP34.0206
08MAR07
NETWORK INFORMATION
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 an air bag has
low pressure or if a room in limit switch is not made, if the
ignition is in the "ON" position.
CAUTION:
ROOM IS EXTENDED. DO NOT MOVE THE VEHICLE AT
If the Park Brake is not set, the Leveling System cannot
be turned ON and the room extension will not operate.
NEUTRAL HOLD OVERRIDE SWITCH
HWH LIGHTED RESET SWITCH
shift out of NEUTRAL, using a key or a screwdriver turn the
HOLD OVERRIDE selector switch to the position labeled
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 a room is not fully retracted, the transmission will not
shift out of "NEUTRAL".
If the rooms are fully retracted and the transmission will not "110" position for normal operation.
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.
The vehicle suspension will return to the travel mode if the
IF THE IGNITION IS IN THE "ON"
POSITION AND THE LIGHTED RESET SWITCH IS ON,
THE VEHICLE CAN RETURN TO RIDE HEIGHT WITHOUT
RELEASING THE PARK BRAKE.
ignition key is in the "ON" position.
CAUTION:
HOLD OVERRIDE selector switch should be left in the
"220" the switch is located on the outside of the Central
Control Module. This will allow the transmission to be shifted.
The system should be serviced as soon as possible. The
If a ROOM CONTROL SWITCH is being pushed, no other
room or the Leveling System can be operated. If any Leveling
System raise or lower function is being operated, no room
control switch will work.SPEEDS IN EXCESS OF 5 MPH IF THE MASTER
WARNING LIGHT IS ON.
Excessive operation of the hydraulic pump can shut the HWH
CAN network down. The lighted reset switch will be on if the
ignition is on. The reset button must be pushed before any
operation can continue. Allow the pump to cool before
continuing hydraulic operations.
The HWH 2000 series CAN system is a computerized
modular network. It controls all functions of the leveling
system and the room extensions. The network is active any
time the ignition is in the "ON" position or when any room
extension control panel key is "ON". Certain functions and
indicator lights for the leveling system will work when the
network is active. Certain functions and lights will work ONLY
if the the ignition is in the "ON" position to start the function.
The "DUMP" and "RAISE" buttons will function with the
leveling system and park brake off, if the ignition is in the
"ON" position or if the network is active. See AIR DUMP
AND RAISE FUNCTIONS section of this manual.
The HWH lighted reset switch is located on the shifter 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" position, the
lighted reset switch and the MASTER WARNING Light will
come on.
NOTE: The network will stay active for 10 minutes after
the ignition key and all room extension control panel
keys have been turned "OFF". If the leveling system
was turned "ON", the network will stay active for 10
minutes after automatic leveling is complete or the
system goes "EXCESS SLOPE". If manual leveling
buttons were used, the network stays active for 10
minutes after the last manual button is released.
DO NOT MOVE THE VEHICLE IF A

OPERATING PROCEDURES
MP34.3400
08MAR07
PREPARATION FOR TRAVEL
Visually check that the vehicle is at the proper ride height for
traveling.
The ignition must be in the "ON" position for the vehicle
suspension to be in the travel mode. Also the "TRAVEL
MODE" button must be pushed or the park brake released
for the suspension to be in the travel mode If the Leveling
CAUTION: IT IS THE OPERATOR’S
RESPONSIBILITY TO CHECK THAT THE VEHICLE
IS AT PROPER RIDE HEIGHT AND ALL SLIDE-OUTS
ARE FULLY RETRACTED BEFORE TRAVELING.
Before traveling, the MASTER WARNING light must be off
and the "TRAVEL MODE" light must be ON.
System was used.
A lit "TRAVEL MODE" light indicates that the HWH Leveling
System is in the TRAVEL MODE. It does not indicate that
the suspension is at ride height or that the coach is ready
to travel.
AUTOMATIC AIR OPERATION
will begin. The system will attempt to level the vehicle by
SYSTEM ACTIVE LIGHT will start flashing and air leveling
4. Press the "AIR" button a second time. The LEVELING
The "NOT IN PARK/BRAKE" light will be on while the
panel will not turn on if the park brake is not set.
ignition can be moved to the "OFF" position and the
use the "AIR" button. Once the operation is started, the
"AIR" button is being pushed.
NOTE: If the ignition key is in the "ON" position, the
NOTE: The ignition must be in the "ON" position to
leveling is complete.
When all four yellow LEVEL SENSING lights are out the
the vehicle will be raised by adding air to the air bags.
achieved by lowering the vehicle, the low side and/or end of
exhausting air from the air bags. If a level position is not
5. 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.
operation will continue. If a ROOM CONTROL switch is
being pushed, the Leveling System can not be operated.
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.
7. If the vehicle needs to be releveled, the CAN Network will
become active. 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,
releveling the vehicle as needed.
Refer to "DUMP" and "RAISE" FUNCTIONS operating
procedures when moving the vehicle with the suspension
NOT at the proper ride height.
6. During the Sleep Mode, after 30 minutes the processor
checks the Level Sensing Unit inputs. If no input for a yellow
level light is seen, the processor remains dormant and will
recheck the level unit inputs every thirty minutes. If a yellow
level light input is on for one minute continuously, the
processor will relevel the vehicle, then return to the sleep mode.
NOTE: Touch Panel Lights will not be ON unless the
system is actively leveling the vehicle.
1. Place the transmission in the proper position for parking
and set the park brake. The air leveling system can only be
turned on if the ignition is in the "ON" position. Leaving the
engine running during leveling is recommended. This will
provide a better air supply for leveling. The vehicle will level
with the engine shut off, however more time will be required
for leveling.
3. Press the "AIR" button once to enter the air mode. The
LEVELING SYSTEM ACTIVE LIGHT will glow steady. When
the ignition is in the "ON" position, the four red WARNING
lights on the panel will come on. This indicates that the
height control valves have been locked out. The vehicle
should not be moved when these lights are on.
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 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.
Check that all room extensions are fully retracted. The green
"TRAVEL MODE" light on the touch panel will not be on if a
room is extended. The MASTER WARNING light will be ON.
(SEE ROOM RETRACT PROCEDURES)
NOTE: Low air pressure or an extended room can turn
the green "TRAVEL MODE" light off and turn the
MASTER WARNING light on.
2. Make sure the Tag Lift switch is in the OFF position.

OPERATING PROCEDURES
MP34.3500
08MAR07
AUTOMATIC AIR OPERATION (Continued)
vehicle for approximately 15 to 20 minutes. After the
15 to 20 minutes, if a LEVEL SENSING light is still on,
the "EXCESS SLOPE" light will come on. The LEVEL
LIGHT indicator light will go out. The "EXCESS SLOPE"
"EXCESS SLOPE" light is on but they can be retracted.
The "EXCESS SLOPE" light will be on whenever the network
is active until the vehicle is manually leveled with all yellow
LEVEL indicator lights off. Releasing the park brake with the
light will be on whenever the network is active.
NOTE: Room extensions can not be extended if the
EXCESS SLOPE: The system will attempt to level the
NOTE: The CAN Network will stay active for 10 minutes
after releveling the vehicle and then shut down, turning
the touch panel lights OFF. This happens every time the
system relevels the vehicle.
7. The SLEEP MODE will continue until the "EMERGENCY
STOP" button is pushed or the park brake is released, if the
ignition is in the "ON" position.
TAG AXLE DUMP
The tag axle dump switch is supplied by Foretravel.
IMPORTANT: Refer to Foretravel for proper use of the
TAG DUMP feature.
The tag dump switch will work only with the ignition switch
in the "ON" position and the Leveling System panel off.
If the TAG DUMP switch is in the DUMP position and the
ignition key is turned ON (with the Leveling System panel
OFF) the tag axle air bags will go into the dump mode.
The TAG DUMP switch, in either the DUMP or OFF
position, will not interfere with any air leveling operations.
When the TAG DUMP switch is in the DUMP position, with
the ignition switch on, the tag axle manifold tag enable valves
are off. When the TAG DUMP switch is in the TRAVEL
position, with the ignition switch on, the tag axle manifold
tag enable valves will be on. Whenever the LEVELING
SYSTEM ACTIVE light is on, the tag axle manifold travel
valves will be on.The tag axle dump switch will not work if the vehicle is
moving at a speed in excess of approximately 10 mph.
ignition on will turn the "EXCESS SLOPE" light off.
NOTE: It is better to have the TAG DUMP switch in the
OFF position before using the leveling system.

OPERATING PROCEDURES
MP34.3700
08MAR07
MANUAL AIR OPERATION
NOTE: The ignition must be in the "ON" or "ACC"
position to use the "AIR" button. Once the operation
is started, the ignition can be moved to the "OFF"
NOTE: If the "NOT IN PARK/BRAKE" light is on,
NOTE: If the "DUMP" or "RAISE" buttons are pushed
the leveling system cannot be turned on.
before leveling the vehicle front to rear. The yellow LEVEL
indicator light indicates that side or end is low. When all yellow
lights are out the vehicle is level. Try leveling the vehicle by
while manually leveling the vehicle with air and the
ignition is in the "ON" position, the system will latch
into the dump or raise mode until the "EMERGENCY
STOP" button is pushed or the ignition is turned off.
4. Turn the ignition to the "OFF" position.
5. Turn the system off.
"DUMP" AND "RAISE" FUNCTIONS
CAUTION: REREAD CAUTIONS ON THE FIRST
PAGE OF THIS MANUAL. THE VEHICLE MAY DROP OR
RAISE AND/OR MOVE FORWARD OR BACKWARD
WITHOUT WARNING CAUSING INJURY OR DEATH.
THE AIR SUSPENSION IS AT THE PROPER
DO NOT OPERATE THE VEHICLE UNLESS
RESPONSIBILITY TO CHECK THAT THE VEHICLE
IS AT PROPER RIDE HEIGHT BEFORE TRAVELING.
CAUTION: IT IS THE OPERATOR’S
The "RAISE" and "DUMP" buttons can be used at any time
the network is active. The park brake does not have to be on.
If the ignition is in the "ON" position and the park brake is off,
the "RAISE" or "DUMP" buttons will latch in. The vehicle will
raise or lower completely and stay in that position.
The vehicle can not return to ride height until the "TRAVEL
MODE" button or the "EMERGENCY STOP" button is pushed
position and the operation will continue.
The "DUMP" and "RAISE" functions are provided for operator
convenience for purposes such as dumping the air
suspension when parked.
Leave the engine running if the "RAISE" function is to be
used. The park brake does not have to be set to use the
"DUMP" or "RAISE" buttons.
HEIGHT FOR TRAVEL.
or the vehicle exceeds 10 M.P.H, putting the system in the
TRAVEL MODE.
(up arrow) button to raise the low side or end.
lights). If a level position is not achieved use the RAISE
1. Place the transmission in the proper position for parking
and set the park brake. The air leveling system can only be
turned on if the ignition is in the "ON" position. Running the
vehicle engine during leveling is recommended. This will
provide a better air supply for leveling. The vehicle will level
with the engine shut off, however more time will be required
for leveling.
2. Press the "AIR" button once to enter the air mode. The
LEVELING SYSTEM ACTIVE LIGHT indicator light will glow
steady. When the ignition is in the "ON" position, the four red
WARNING lights on the panel will come on. This indicates
that the height control valves have been locked out. The
vehicle should not be moved when these lights are on.
IMPORTANT: If the ignition is ON and the park brake is
OFF, the "DUMP" and "RAISE" features will latch in and
remain on. If the vehicle exceeds 10 MPH, the "DUMP"
or "RAISE" functions will automatically turn off and the
system will return to the TRAVEL MODE. If the park
brake is set, the "TRAVEL MODE" button must be
pushed before the vehicle can return to ride height.
If the ignition is in the "OFF" position the "RAISE" and
"DUMP" buttons will not latch in. The vehicle will remain in
the position it was when the button was released. The
vehicle can return to ride height when the ignition is turned
to "ON" if the park brake is released or the "TRAVEL MODE"
button is pushed.
lowering the high side or end (opposite of the lit yellow level
3. The vehicle can now be leveled using the RAISE (up arrow)
and LOWER (down arrow) buttons on the right half of the
panel in conjunction with the yellow LEVEL indicator lights.
Any side to side leveling should be done, if needed,
NOTE: In either manual or automatic leveling when
either front air manifold air bag pressure switch is on
a front lower procedure is halted. When either rear air
manifold air bag pressure switch is on, a rear lower
procedure is halted. Air bag pressure switches will
not interfere with either a right or left lower procedure.
DO NOT operate the vehicle for extended distances
unless the air suspension is at the proper height for
travel. The vehicle can not return to ride height until
the "EMERGENCY STOP" button is pushed or the
vehicle exceeds 10 MPH, putting the system in the
TRAVEL MODE.

OPERATING PROCEDURES
MP34.4301
06MAY19
ROOM EXTEND PROCEDURE
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.
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.
IMPORTANT: If the "EXCESS SLOPE" light is ON, the
vehicle must be re-leveled so all yellow LEVEL indicator
lights on the touch panel are OFF before the room can be
extended. If any of the four yellow LEVEL indicator lights
cannot be put out, the vehicle should be moved to a
more level location before using the room extension.
power down.
will not extend.
Make sure the door or a window is open while extending
a room.
than 10 seconds) before the PUMP ON light comes on after
the red PUMP ON light goes out.
release the room control switch.
remains on 30 seconds after the room is fully extended
go out. Do not release the ROOM CONTROL SWITCH, until
pump will automatically shut off. The red PUMP ON light will
the switch is pushed. When the room is fully extended, the
If the red PUMP ON light
3. To extend the room, push and hold the ROOM CONTROL
come on. There may be a delay of several seconds (no more
SWITCH in the extend position. The red PUMP ON light will
The Room Control switch will not work until the vacuum
the room unless the Room Control switch is released.
of vacuum in the air seal will not halt the movement of
While the Room Control Switch is being pushed a loss
operation when the Room Control switch is pushed.
air seal is deflated. This may cause a delay in room
seal is monitored by a vacuum switch to make sure the
NOTE: The room is equipped with an air seal, the air
switch is made.
room extension and leveling system operation.
Refer to vehicle manufacturer for proper sequence of

OPERATING PROCEDURES
MP34.450
1
07MAY1
9
ROOM RETRACT PROCEDURE
1. The park brake must be set for the room to be operated.
CAUTION:KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING.
2. Insert the KEY into the KEY SWITCH on the room
extension operator’s panel and turn it to the "ON" position.
The air seal will deflate. The READY TO OPERATE light
will flash. When the amber light is on steady the room can
room will not retract. If the room panel KEY SWITCH is
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.
seal will inflate.
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 o
f
the room must be reversed, do not try to retract the
room until the room has been fully extended.
power down.
Make sure the door or a window is open while extending
a room.
be operated.
IN THE EVENT OF THE FAILURE OF THE ROOM TO
RETRACT, CONTACT HWH CORPORATION CUSTOMER
SERVICE AT 1-800-321-3494 FOR ASSISTANCE.
SWITCH in the retract position. The red PUMP ON light will
come on. There may be a delay of several seconds (no more
than 10 seconds) before the PUMP ON light comes on after
the switch is pushed. When the room is fully retracted, the
pump will automatically shut off. The red PUMP ON light will
go out. Do not release the ROOM CONTROL SWITCH, until
If the red PUMP ON light
remains on 30 seconds after the room is fully retracted
3. To retract the room, push and hold the ROOM CONTROL
release the room control switch.
the red PUMP ON light goes out.
NOTE: The room is equipped with an air seal, the air
seal is monitored by a vacuum switch to make sure the
air seal is deflated. This may cause a delay in room
operation when the Room Control switch is pushed.
While the Room Control Switch is being pushed a loss
of vacuum in the air seal will not halt the movement of
the room unless the Room Control switch is released.
The Room Control switch will not work until the vacuum
switch is made.
room extension and leveling system operation.
Refer to vehicle manufacturer for proper sequence of

OPERATING PROCEDURES
MP34.6100
07APR08
GENERATOR SLIDE EXTEND PROCEDURE
WARNING:
CLEAR OF SLIDE WHEN OPERATING.
NOTE:Make sure there is adequate clearance to fully extend
the slide.
2. To extend the slide, press and hold the GENERATOR
SLIDE CONTROL SWITCH in the "EXTEND" position.
When the slide is fully extended, release the GENERATOR
SLIDE CONTROL SWITCH.
IMPORTANT: Do not hold the GENERATOR SLIDE
CONTROL SWITCH in the "EXTEND" position for more than
ten seconds after the slide is fully extended or stops moving.
NOTE: Releasing the GENERATOR SLIDE CONTROL
SWITCH will halt the operation of the slide.
GENERATOR SLIDE RETRACT PROCEDURE
2. To retract the slide, press and hold the GENERATOR
SLIDE CONTROL SWITCH in the "RETRACT" position.
When the slide is fully retracted, release the GENERATOR
SLIDE CONTROL SWITCH.
than ten seconds after the slide is fully retracted or stops
CONTROL SWITCH in the "RETRACT" position for more
Do not hold the GENERATOR SLIDEIMPORTANT:
Releasing the GENERATOR SLIDE CONTROL
SWITCH will halt the operation of the slide.
NOTE:
3. If the slide will not retract see the MANUAL SLIDE
RETRACT PROCEDURE.
KEEP PEOPLE AND OBSTRUCTIONS
1. THE PARK BRAKE MUST BE SET FOR THE SLIDE TO
OPERATE.
THE PARK BRAKE MUST BE SET FOR THE SLIDE TO1.
OPERATE.
DO NOT FORCE THE SLIDE.
moving. DO NOT FORCE THE SLIDE.
MP35.909C

MP44.000
8
13NOV1
7
MAINTENANCE
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 maintenance should be done as part of the normal
servicing of the coach.
Any HWH hydraulic equipment, including jacks, slide-outs
cap before removing.
breather cap. Clear any dirt away from the breather / filler
assembly. The oil level is checked and filled through the
level. The oil reservoir is part of the pump / manifold
and steps should be fully retracted before checking fluid
The oil level should be within one inch of the top of the
reservoir. Most breather caps have a dipstick. Fluid level
should be between the bottom of the dipstick and the
NOTE: Overfilling the tank can cause leakage of oil
emergency Dexron automatic transmission fluid can be used
.
Dexron automatic transmission fluid contains red dye
HWH Specialty Hydraulic Oil is recommended. In an
and can cause staining should a leak occur. DO NOT USE
brake fluid or hydraulic jack fluid. Use of these can damage
through the breather cap.
seals.
NOTE:
FLUID:
center mark.

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