HWH 680 Series User manual

H
CORPORATION
H
W
R
FEATURING:
TOUCH PANEL LEVELING CONTROL
AIR LEVELING
HWH COMPUTER-CONTROLLED
OPERATOR’S MANUAL
DUMP
LEVEL
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
CAUTION!
OFF
NOT IN
TRAVEL
EXCESS
SLOPE
PARK/
BRAKE
DUAL CYLINDER "LEVEL FLOOR" ROOM EXTENSION
RAISE
AIR
HWH COMPUTERIZED LEVELING
680 SERIES
LEVELING SYSTEM
SINGLE CYLINDER "BEDROOM" ROOM EXTENSION
18MAY01
ML17140/MP05.4710
SPACEMAKER ROOM EXTENSION SYSTEM
(ON I-80, EXIT 267 SOUTH)
INTERNET: http: //www.hwhcorp.com
[phone] / [phone]
MOSCOW, IOWA 52760
2096 MOSCOW ROAD
HWH CORPORATION
AP21910

CAUTION !
READ THE ENTIRE OPERATOR’S MANUAL BEFORE OPERATING.
MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.
CAUSING INJURY OR DEATH.
CHIPS, OIL LEAKS, ETC. FOLLOW ALL OTHER APPLICABLE SHOP SAFETY PRACTICES.
OPERATOR’S MANUAL
MP15.4501
30MAY01
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
"OFF" BUTTON
"EXCESS SLOPE" "NOT IN PARK"
RAISE RIGHT SIDE BUTTON
LOWER RIGHT SIDE BUTTON
LEVELING LIGHT
(4 - Yellow)
WARNING LIGHT
(4 - Red)
RAISE REAR BUTTON
LOWER REAR BUTTON
LEVEL LIGHT
DUMP LIGHT
"RAISE" BUTTON
"TRAVEL" LIGHT
This button will turn the system OFF but
does NOT control power to the "DUMP" or "RAISE" buttons.
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.
This light will be on if the leveling
system can NOT level the coach.
This light will be on if the leveling system is off
and the ignition is in the "ON" position. See PREPARATION
FOR TRAVEL".
CONTROL BUTTONS INDICATOR LIGHTS
MP25.4705
07APR00
CONTROL FUNCTIONS
"LEVEL" BUTTON
CAUTION!
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
OFF RAISE
DUMP
TRAVEL
NOT IN
PARK/
HWH COMPUTERIZED LEVELING
LEVEL AIR EXCESS
SLOPE
BRAKE
This light will be on if the "AIR"
"DUMP" BUTTON
RAISE LIGHT
RAISE LEFT SIDE
BUTTON
LOWER LEFT SIDE
BUTTON
RAISE FRONT BUTTON
LOWER FRONT BUTTON
This light will flash when the "RAISE" button
is pushed.
switch is in the "ON" position. The system will not turn on.
"LEVEL" BUTTON:
"OFF" BUTTON:
"DUMP" BUTTON:
"RAISE" BUTTON:
UP ARROWS (RAISE BUTTONS):
DOWN ARROWS (LOWER BUTTONS):
IMPORTANT:
LEVEL LIGHT:
DUMP LIGHT:
RAISE LIGHT:
"EXCESS SLOPE" LIGHT:
"TRAVEL" LIGHT:
WARNING LIGHTS:
LEVELING LIGHTS:
"NOT IN PARK/BRAKE" LIGHT:
button is pushed and the park brake is not set if the ignition
LIGHT LIGHT
This light will flash when the "DUMP" button
is pushed.
This button is the system on button and
automatic operation button. This will only work 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 raise while these buttons are pushed.
These momentary
buttons are used to manually operate 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 indi-
cating the side, end or corner of the coach is low.
These lights will function only with the
ignition key in the "ON" position. They will be on only if the
system is on.
This light will be on when the system is on,
and flash during automatic leveling.
Read "DUMP AND RAISE FUNCTIONS" before
using the "DUMP" or "RAISE" buttons.

19JAN00
MP25.4720
ROOM EXTENSION WARNING LIGHTS:
ok to extend or retract the room extension.
AIR SEAL INDICATOR LIGHT:
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 ROOM KEY SWITCH:
switch in the RETRACT POSITION will retract the room. Re-
leasing the ROOM CONTROL SWITCH will halt the operation
of the room.
This light will be on when it is
the EXTEND POSITION will extend the room. Pressing the
is a two position momentary switch. Pressing the switch in
The ROOM CONTROL SWITCH ROOM CONTROL SWITCH:
CONTROL FUNCTIONS
KEY SWITCH
USING. KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING. RETRACT
UNDERSTAND OPERATOR’S MANUAL BEFORE
CAUTION!
ON
LIGHT (AMBER)
AIR SEAL INDICATOR
ROOM CONTROL
HYDRAULIC ROOM EXTENSION
OFF EXTEND SWITCH
H
HW
CORPORATION
R
ROOM EXTENSION OPERATOR’S PANEL
CONTROL IDENTIFICATION
PUMP ON INDICATOR
LIGHT (RED)
(This light is not
part of the ROOM EXTENSION OPERATOR’S PANEL)
This warning light will be on if a room is extended or unlocked
and the ignition is on.
PUMP ON INDICATOR LIGHT: This light will be on when
the pump is running.

OPERATING PROCEDURES
MP35.4713
19JAN00
NEUTRAL HOLD OVERRIDE SWITCH
GENERAL INSTRUCTIONS
PREPARATION FOR TRAVEL
Press the "OFF" button at any time to stop the operation of
the system.
may return to travel height.
is not set, the "NOT IN PARK" light will come on and the system
will not operate when the "AIR" button is pressed. The "NOT IN
PARK" light will remain on only while the "AIR" button is pressed.
If the ignition is in the "ON" position and the hand/auto brake
Start the vehicle’s engine and allow air pressure to build to
CAUTION: DO NOT MOVE THE COACH WHEN THE
NOTE : If the ignition switch is "ON" the vehicle’s air suspension
CAUTION:
the recommended level for traveling. Before traveling, the
"TRAVEL" light must be on.
IT IS THE OPERATOR’S RESPONSIBILITY
TO VISUALLY MAKE SURE THE COACH IS AT THE PROP-
AIR BAGS ARE DEFLATED.
Do not operate the room extensions unless the coach is level.
The "DUMP" and "RAISE" buttons will function with the sys-
tem and park brake off. (See AIR DUMP AND RAISE FUNC-
TIONS.)
ER RIDE HEIGHT AND THE ROOMS ARE FULLY RETRACT-
ED BEFORE TRAVELING.
Rooms should be retracted and locked before allowing the coach
to return to ride height.
If a room is extended or unlocked, the transmission will not
shift out of NEUTRAL.
If a room is not fully retracted or a room lock is not engaged,
the transmission will not shift out of the neutral position.
toggle switch to the "ON" position. The switch is located in the
control box. This will allow the transmission to be shifted. The
system should be serviced as soon as possible.
If the rooms are fully retracted and locked and the transmission
will not shift out of NEUTRAL, move the NEUTRAL OVERRIDE

OPERATING PROCEDURES
MP35.4725
19JAN00
AIR OPERATION
AUTOMATIC AIR OPERATION
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.
will not turn on if the park brake is not set. The "NOT IN PARK/
BRAKE" light will come on while the "AIR" button is being
pushed.
2. Press the "AIR" button once to enter the air mode. The AIR
OPERATION 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
have been locked out. The vehicle should not be moved when
these lights are on.
3. Press the "AIR" button a second time. The AIR OPERATION
indicator light will start flashing and air leveling will begin. The
system will attempt to level the vehicle by exhausting air from
the air bags. If a level position is not achieved by lowering the
vehicle, the low side and/or end of the vehicle will be raised by
adding air to the air bags. When all four LEVEL SENSING lights
SENSING lights on when air leveling is started, the AIR OPER-
ATION indicator light will flash for 3 seconds and then will be
are out the leveling is complete. The AIR OPERATION indicator
light will stop flashing, but will remain on. If there are no LEVEL
on steady.
When the AIR OPERATION indicator light is on steady, the
processor will be in a sleep mode for 30 minutes. The light
will remain on. The vehicle’s engine may now be turned off.
After 30 minutes the processor will recheck the level indicators.
If a level indicator is observed for 1 minute, the AIR OPERA-
TION indicator light will start flashing and the system will level
the vehicle and return to the SLEEP MODE. This will continue
until the system is turned off by pushing the "OFF" button or by
releasing the park brake if the ignition is in the "ON" position.
and the panel is off, the vehicle may return to travel height.
NOTE: If the ignition key is in the "ON" position, the panel
NOTE: At any time the ignition switch is in the "ON" position
The ignition must be in the "ON" position to use the "AIR" NOTE:
button. Once the operation is started, the ignition can be moved
to the "OFF" position and the operation will continue.
EXCESS SLOPE: The system will attempt to level the vehicle
for approximately 45 minutes. After the 45 minutes, if a LEVEL
SENSING light is still on, the "EXCESS SLOPE" light will come
on. The AIR OPERATION indicator light will be on steady, but
the system will not go into the SLEEP MODE. Turn the system
off.

OPERATING PROCEDURES
MP35.4750
19JAN00
MANUAL AIR OPERATION
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
air leveling is recommended. This will provide a better air supply
for leveling. The vehicle will level with the engine shut off, how-
ever more time will be required for leveling.
If the ignition key is in the "ON" position the panel will
not turn on if the park brake is not set. The "NOT IN PARK/BRAKE"
light will come on while the "AIR" button is being pushed.
2. Press the "AIR" button once to enter the air mode. The AIR
OPERATION 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.
3. The vehicle can now be leveled using the RAISE (up arrow)
and LOWER (down arrow) buttons on the right half of the panel
side or end. If a level position is not achieved use the RAISE
If the "DUMP" or "RAISE" buttons are pushed while
manually leveling the vehicle with air, the system will latch into
the dump or raise mode until the "OFF" button is pushed.
4. Turn the ignition to the "OFF" position.
5. Turn the system off.
"DUMP" AND "RAISE" FUNCTIONS
(up arrow) button to raise the low side or end. The yellow
LEVEL indicator light indicates that side or end is low. When
all yellow lights are out the vehicle is level.
The ignition must be in the "ON" position to use the "AIR",
NOTE:
NOTE:
NOTE:
AIR OPERATION (Cont’d)
button. Once the operation is started, the ignition can be moved
to the "OFF" position and the operation will continue.
in conjunction with the yellow LEVEL indicator lights. Any side
to side leveling should be done before leveling the vehicle
front to rear. Try leveling the vehicle by lowering the opposite
The "DUMP" and "RAISE" functions are provided for operator
convenience for purposes such as dumping air suspension
when parked in the wind or raising or lowering the vehicle to
avoid an obstacle.
IMPORTANT:
CAUTION:
CAUTION: IT IS THE OPERATOR’S RESPONSIBLE-
ITY TO CHECK THAT THE VEHICLE IS AT THE PROPER
RIDE HEIGHT FOR TRAVELING.
The vehicles ignition must be in the ON position to use the
"DUMP’or "RAISE" buttons. The park brake does not have
to be set.
The "DUMP" and "RAISE" functions will latch
in and remain on if the vehicle is moving at a speed less than
approximately 5 MPH. If the speed exceeds 5 MPH, the
"DUMP" or "RAISE" function will automatically turn off and
the vehicle should return to ride height. The vehicle will not
return to ride height unless the "OFF" button on the leveling
system panel is pushed or the vehicle speed exceeds 5 MPH.
REREAD CAUTIONS ON THE FIRST
PAGE OF THIS MANUAL. THE VEHICLE MAY DROP OR
RAISE AND / OR MOVE FORWARD OR BACKWARD
WITH OUT WARNING CAUSING INJURY OR DEATH.
DO NOT OPERATE THE VEHICLE OVER 5 MPH UNLESS
THE AIR SUSPENSION IS AT THE PROPER HEIGHT FOR
TRAVEL.
Press the "RAISE" or "DUMP" button as desired to raise or
lower the vehicle. The "RAISE" function will perform better if
the vehicle engine is running. The desired function will latch
in when the button is pushed. The vehicle will raise or lower
as far as the suspension will allow.
If the vehicle is moving faster than 5 MPH, the vehicle will
raise or lower only while the button is being pushed. When
the button is released, the vehicle will return to ride height.
The vehicle will return to ride height when the vehicle speed
exceeds 5 MPH or if the "OFF" button on the touch panel is
pushed.
If desired for clearing an obstacle the vehicle may be moved
while in the "RAISE" or "DUMP" mode.
DO NOT operate the vehicle over 5 MPH or for extended
distances unless the air suspension is at the proper
height for travel. The vehicle will not return to ride height
until the "OFF" button is pushed or the vehicle exceeds
5 MPH.

LEVEL FLOOR ROOM EXTEND PROCEDURES
OPERATING PROCEDURES
fully extended the sub floor will raise into position. The pump
running, the red PUMP ON light will be on. When the room is
SWITCH in the "EXTEND" position. When the pump is
can now be extended.
turned on, the AIR SEAL indicator light will come on. The room
3. Approximately twenty seconds after the KEY SWITCH is
the AIR SEAL light comes on, the room will not extend.
4. To extend the room, press and hold the ROOM CONTROL
the room air seal to deflate.
SWITCH and turn the key to the "ON" position. This will allow
2. Insert the key in the ROOM OPERATOR’S PANEL KEY
NOTE: If the ROOM CONTROL SWITCH is pushed before
room locks will not disengage.
locks in place. Do NOT attempt to force the room out if the
locking cylinders. The room can NOT be extended with the
1. Turn the vehicle ignition to the "ON" position.
OBSTRUCTIONS BEFORE EXTENDING OR RETRACTING THE
THE SURROUNDING AREAS ARE CLEAR OF PEOPLE AND OTHER
SION, THE MOVING SECTIONS OF THE FLOOR SYSTEM AND
TO ENSURE THAT ALL MOVING PARTS OF THE ROOM EXTEN-
the vehicle to fully extend the room.
IMPORTANT: This room is equipped with hydraulic room
NOTE: Make sure there is adequate clearance outside of
if the coach is not level.
ROOM.
CAUTION:
be extended.
NOTE: The park brake must be set before the room can
IMPORTANT: It is not recommended to extend the room
IT IS THE OPERATOR’S RESPONSIBILITY
CONTROL SWITCH can be released after the pump shuts
6. Remove the KEY to prevent undesired operation of the room.
5. Turn the KEY SWITCH to the "OFF" position. The room air
ROOM EXTENSION SYSTEM CALL HWH CORPORATION,
7. Turn the ignition switch off.
1-800-321-3494, CUSTOMER SERVICE, FOR ASSISTANCE.
IMPORTANT: IN THE EVENT OF ANY FAILURE OF THE
seal will inflate.
off.
When the room is fully extended, the sub floor will then raise
extended. Release the switch after the pump has shut off.
will automatically shut off when the room and floor are fully
into position. The procedure is ended automatically. The ROOM
after the KEY SWITCH is turned on, the AIR SEAL INDICATOR
turned on, the air seal will deflate. Approximately 20 seconds
release the switch immediately. Never attempt to force
the room locks will disengage and the room will begin to extend.
When the ROOM CONTROL SWITCH is pushed to "EXTEND"
When the KEY SWITCH is
LIGHT will come on.
is in the "ON" position the room air seal will deflate.
ROOM AND FLOOR OPERATION:
the operation of the room.
NOTE: Anytime the KEY SWITCH is on and the ignition
IMPORTANT: If either side of the room stops moving,
NOTE: Releasing the ROOM CONTROL SWITCH will halt
the system.
IMPORTANT: If the room is fully extended and the
Pump On light stays on for more than 30 seconds,
release the ROOM CONTROL SWITCH.
07OCT03
MP35.4753

LEVEL FLOOR ROOM RETRACT PROCEDURE
OPERATING PROCEDURES
the AIR SEAL light comes on, the room will not retract.
4. To retract the room, press and hold the ROOM CONTROL
The room can now be retracted.
turned on, the AIR SEAL INDICATOR LIGHT will come on.
3. Approximately twenty seconds after the KEY SWITCH is
SWITCH and turn the key to the "ON" position. This will
2. Insert the key in the ROOM OPERATOR’S PANEL KEY
1. Turn the vehicle ignition to the "ON" position.
OF PEOPLE AND OTHER OBSTRUCTIONS BEFORE
SYSTEM AND THE SURROUNDING AREAS ARE CLEAR
EXTENSION, THE MOVING SECTIONS OF THE FLOOR
TO ENSURE THAT ALL MOVING PARTS OF THE ROOM
allow the room air seal to deflate.
NOTE: If the ROOM CONTROL SWITCH is pushed before
be retracted.
CAUTION:
NOTE: The park brake must be set before the room can
and stabile before reracting the room.
IMPORTANT: It is recommended that the vehicle is level
IT IS THE OPERATOR’S RESPONSIBILITY
CUSTOMER SERVICE, 1-800-321-3494 FOR ASSISTANCE.
ROOM EXTENSION SYSTEM CALL HWH CORPORATION,
6. Remove the KEY to prevent undesired operation
7. Turn the ignition switch off.
IMPORTANT: IN THE EVENT OF ANY FAILURE OF THE
08DEC03
MP35.4756
locks will engage. The pump will automatically shut off.
will start to retract. When the room is fully retracted, the room
"RETRACT", the sub floor section will lower, then the room
seconds after the KEY SWITCH is turned on, the AIR SEAL
is turned on, the air seal will deflate. Approximately twenty
release the switch immediately. Never attempt to force
5. Turn the KEY SWITCH to the "OFF" POSITION.
When the ROOM CONTROL SWITCH is pushed to
is in the "ON" position, the room air seal will deflate.
When the KEY SWITCH
Release the ROOM CONTROL SWITCH.
INDICATOR LIGHT will come on.
ROOM AND FLOOR OPERATION:
the operation of the room.
The room air seal will inflate.
NOTE: Any time the KEY SWITCH is on and the ignition
the system.
NOTE: Releasing the ROOM CONTROL SWITCH will halt
IMPORTANT: If either side of the room stops moving,
SWITCH in the "RETRACT" position. When the pump is
running, the red PUMP ON light will be on. The sub floor will
lower and the room will begin to retract. After the room has
been fully retracted and the room locks have engaged, the
pump will automatically shut off. Release the ROOM
CONTROL SWITCH after the pump has shut off.
IMPORTANT: If the room is fully retracted and the Pump
On light remains on for more than 30 seconds, release
the ROOM CONTROL SWITCH.
EXTENDING OR RETRACTING THE ROOM.
of the room.

BEDROOM EXTEND PROCEDURE
BEDROOM RETRACT PROCEDURE
CAUTION:
OPERATING PROCEDURES
MP35.4760
07APR00
NOTE :
The vehicle should be level before extending a room.
1. The ignition key must be on and the park brake must be set
for the room to be operated.
KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING.
Make sure there is adequate clearance to fully extend
the room.
2. Insert the KEY into the KEY SWITCH on the room exten-
sion operator’s panel and turn it to the "ON" position. When
3. To extend the room, push and hold the ROOM CONTROL
IMPORTANT: IF EITHER SIDE OF THE ROOM STOPS
MOVING, RELEASE THE ROOM CONTROL SWITCH IM-
MEDIATELY.
NOTE : Releasing the ROOM CONTROL SWITCH will halt
the operation of the room.
4. Turn the KEY SWITCH to the "OFF" position and remove
the key.
5. Turn off the ignition switch.
CAUTION: KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING.
The vehicle should be level before retracting a room.
1. The ignition key must be on and the park brake must be set
for the room to be operated.
2. Insert the KEY into the KEY SWITCH on the room exten-
sion operator’s panel and turn it to the "ON" position. When
3. To retract the room, push and hold the ROOM CONTROL
IF EITHER SIDE OF THE ROOM STOPS
MOVING, RELEASE THE ROOM CONTROL SWITCH IM-
Releasing the ROOM CONTROL SWITCH will halt
the operation of the room.
IMPORTANT:
MEDIATELY.
NOTE :
4. Turn the KEY SWITCH to the "OFF" position and remove
the key.
IN THE EVENT OF THE FAILURE OF THE ROOM TO RE-
TRACT, CONTACT HWH CORPORATION CUSTOMER SER-
VICE AT 1-800-321-3494 FOR ASSISTANCE.
IMPORTANT:
the AIR SEAL INDICATOR LIGHT is on the room can be op-
erated.
This room is equipped with hydraulic room lock-
ing cylinders. The room can NOT be extended with the locks
in place. DO NOT attempt to force the room out if the room
locks will not disengage.
the AIR SEAL INDICATOR LIGHT is on the room can be op- 5. Turn off the ignition switch.
SWITCH in the EXTEND position. When the pump is running,
the red PUMP ON light will be on. When the room is fully ex-
tended, the pump will automatically shut off. Release the
ROOM CONTROL SWITCH.
SWITCH in the RETRACT position. When the pump is run-
ning the red PUMP ON light will be on. When the room is
fully retracted, the pump will automatically shut off. Release
the ROOM CONTROL SWITCH.
erated.
IMPORTANT: If the room is fully retracted and the Pump On
light remains on for more than 30 seconds, release the
ROOM CONTROL SWITCH.
IMPORTANT: If the room is fully extended and the Pump On
light stays on for more than 30 seconds, release the ROOM
CONTROL SWITCH.

OPERATING PROCEDURES
MP36.103A
19JAN00
1. Ignition key must be in the "ON" position.
3. Turn the room extension control panel key to "ON".
4. Any time the room extension key and ignition key is on, there
is a +12 signal to the air seal valve. The valve will open and
the air will exhaust from the seal.
5. After a 20 second delay, a ground signal will turn the amber
indicator light on the room extension control panel on. The room
extension will not operate until this light is on.
6. Push the Room Extension Control Switch to "EXTEND". This
NOTE: The room control switch must be held in the "EXTEND"
7. A +12 signal will open the room unlock valve. This valve will
stay open during the complete extend sequence.
8. When the room lock pins are fully retracted, the room unlock
limit switch arrangement will send a ground signal to the control
box. The manifold pressure switch will send a ground signal
to the control box when pump pressure reaches 3000 psi. The
sequence will not continue until both signals are received by the
control box.
9. When both the room unlock limit switches and the manifold pres-
sure switch signals are received by the control box, a +12 signal
will open the room extend solenoid valve.
10. When the room is fully extended, the room out limit switch
arrangement sends a ground signal to the control box. The
manifold pressure switch sends a ground signal to the control
box when pump pressure reaches 3000 psi. The sequence will
continue when both signals are received by the control box.
11. When both the room out limit switches and the manifold pres-
13. When both the floor up limit switches and the manifold
pressure switch signals are received by the control box, the pump
NOTE:
14. The air seal will inflate when the room control key switch
is turned off or if the ignition switch is turned off.
PREVOST H3-45 LEVEL FLOOR ROOM EXTENSION SEQUENCE
ROOM EXTEND SEQUENCE
The amber
light on the room control panel will go out.
will send a +12 signal for the pump relay, the room extension
solenoid valves and the lock/unlock solenoid valves from the
control box. A +12 signal turns the red pump on light, on the
room control panel, on when the pump is running.
NOTE: The room, floor and lock limit switches are not connected
directly to the control box. The individual switches are connect-
ed to a central limit switch indicator box for each room. When the
appropriate limit switches complete a +12 circuit for the limit switch
box, the limit switch box supplies a ground signal to the control
box so the sequence can continue.
sure switch signals are received by the control box, a +12 signal
will open the floor up solenoid valve.
NOTE: The unlock valve and room extend valve are still open
at this time.
12. When the floor is up in place, the floor up limit switch sends
a ground signal to the control box. The manifold pressure switch
sends a ground signal to the control box when pump pressure
reaches 3000 psi.
will shut off, the room extend valve will close and the floor up
valve will close. The red pump on light will shut off and the se-
quence is complete. The room control switch may be released.
The unlock valve will stay open for 10 seconds after the
pump shuts off, even if the room control switch is released.
position during the extend sequence. If the room control switch
is released before the sequence is complete, the sequence will
start over from Step 6 when the switch is pushed to extend again.
2. Park brake must be set.

OPERATING PROCEDURES
MP36.103B
13JUL00
1. Ignition key must be in the "ON" position.
3. Turn the room extension control panel key to "ON".
4. Any time the room extension key and ignition key is on, there
is a +12 signal to the air seal valve. The valve will open and
the air will exhaust from the seal.
5. After a 20 second delay, a ground signal will turn the amber
indicator light on the room extension control panel on. The room
extension will not operate until this light is on.
6. Push the Room Extension Control Switch to "RETRACT". This
NOTE: The room control switch must be held in the "RETRACT"
10. When the room lock pins are fully retracted, the room unlock
limit switch arrangement will send a ground signal to the control
box. The manifold pressure switch will send a ground signal
to the control box when pump pressure reaches 3000 psi. The
sequence will not continue until both signals are received by the
control box.
11. When both the room lock limit switches and the manifold pres-
sure switch signals are received by the control box, a +12 signal
12. When the room is fully retracted, the room in limit switch
arrangement sends a ground signal to the control box. The
manifold pressure switch sends a ground signal to the control
box when pump pressure reaches 3000 psi. The sequence will
continue when both signals are received by the control box.
13. When both the room in limit switches and the manifold pres-
sure switch signals are received by the control box, the +12
signal to the room unlock valve is turned off and the unlock valve
closes.
14. A +12 signal opens the room lock valve.
15. When the room lock pins are fully extended, the room lock
limit switch arrangement sends a ground signal to the control
box. The manifold pressure switch sends a ground signal to the
control box when pump pressure reaches 3000 psi.
16. When both the room lock limit switches and the manifold
pressure switch signals are received by the control box, the pump
17. The air seal will inflate when the room control key switch
is turned off or if the ignition switch is turned off.
PREVOST H3-45 LEVEL FLOOR ROOM EXTENSION SEQUENCE
ROOM RETRACT SEQUENCE
The amber
light on the room control panel will go out.
will send a +12 signal for the pump relay, the room extension
solenoid valves, and the lock/unlock solenoid valves from the
control box. A +12 signal turns the red pump on light, on the
room control panel, on when the pump is running.
position during the retract sequence. If the room control switch
is released before the sequence is complete, the sequence will
start over from Step 6 when the switch is pushed to retract again.
7. A +12 signal will open the room extend valve and the floor
down valve. The floor down valve will stay open during the com-
plete retract sequence.
will open the room retract solenoid valve. This valve stays open
until the room retract sequence is complete.
will shut off. All solenoid valves will close. The red pump on
light will shut off and the sequence is complete. The room control
switch may be released.NOTE: The room, floor and lock limit switches are not connect-
ed directly to the control box. The individual switches are con-
nected to a central limit switch indicator box for each room. When the
appropriate limit switches complete a +12 circuit for the limit
switch box, the limit switch box supplies a ground signal to the
control box so the sequence can continue.
9. When the floor down limit switch signal is received by the
control box, the room extend valve will close and a +12
signal will open the room unlock valve. This valve will stay
open during the complete retract sequence. This
assures the room lock pins stay retracted.
2. Park brake must be set.
8. When the floor is completely retracted, the floor down limit
switch arrangement will send a ground signal to the control
box. The sequence will not continue until the signal is
received by the control box.

OPERATING PROCEDURES
ML21658/MP36.105A
19JAN00
PREVOST H3 - 45 BEDROOM EXTENSION SEQUENCE
ROOM EXTEND SEQUENCE
1. Ignition key must be in the "ON" position.
3. Turn the room extension control panel key to "ON".
4. Any time the room extension key and ignition key is on, there
is a +12 signal to the air seal valve. The valve will open and
the air will exhaust from the seal.
5. After a 20 second delay, a ground signal will turn the amber
indicator light on the room extension panel on. The room ex-
tension will not operate until the light is on.
6. Push the Room Extension Control Switch to "EXTEND". This
will send a +12 signal for the pump relay and the room exten-
sion solenoid valves from the control box. A +12 signal turns
NOTE: The room control switch must be held in the "EXTEND"
position during the extend sequence. If the room control switch
is released before the sequence is complete, the sequence
will start over from Step 6 when the switch is pushed to extend
again.
7. A +12 signal will open the room unlock valve. This valve
will stay open during the complete extend sequence.
8. When the room lock pins are fully retracted, the room unlock
limit switch arrangement will send a ground signal to the control
box. The manifold pressure switch will send a ground signal to
the control box when pump pressure reaches 3000 psi. The
sequence will not continue until both signals are received by
the control box.
NOTE:
9. When both the room unlock limit switches and the manifold
pressure switch signals are received by the control box, a
+12 signal will open the room extend solenoid valve.
10. When the room is fully extended, the room out limit switch
arrangement sends a ground signal to the control box. The
manifold pressure switch sends a ground signal to the control
box when the pump pressure reaches 3000 psi. The sequence
will continue when both signals are received by the control
box.
11. When both the room out limit switches and the manifold
pressure switch signals are received by the control box, the
+12 signal to the room extend valve is turned off. The extend
sequence is finished and the pump will shut off. The room con-
trol switch may be released.
12. The red pump on light will go out.
NOTE: The unlock valve will stay open for 10 seconds after
the pump shuts off, even if the room control switch is released.
13. The air seal will inflate when the room control key switch
is turned off or if the ignition switch is turned off. The amber
light on the room control panel will go out.
The room and lock limit switches are not connected
directly to the control box. The individual switches are con-
nected to a central limit switch indicator box for each room.
When the appropriate limit switches complete a +12 circuit for
the limit switch box, the limit switch box supplies a ground sig-
nal to the control box so the sequence can continue.
2. Park brake must be set.
the room control panel red pump on light ON when the pump
is running.

OPERATING PROCEDURES
ML21658/MP36.105B
19JAN00
PREVOST H3 - 45 BEDROOM EXTENSION SEQUENCE
ROOM RETRACT SEQUENCE
1. Ignition key must be in the "ON" position.
3. Turn the room extension control panel key to "ON".
4. Any time the room extension key and ignition key is on, there
is a +12 signal to the air seal valve. The valve will open and
the air will exhaust from the seal.
5. After a 20 second delay, a ground signal will turn the amber
indicator light on the room extension panel on. The room ex-
tension will not operate until the light is on.
6. Push the Room Extension Control Switch to "RETRACT".
This will send a +12 signal for the pump relay and the room
extension solenoid valves from the control box. A +12 signal
NOTE: The room control switch must be held in the "RETRACT"
position during the retract sequence. If the room control switch
is released before the sequence is complete, the sequence
will start over from Step 6 when the switch is pushed to re-
tract again.
7. A +12 signal will open the room unlock valve. This valve
will stay open during the complete retract sequence.
8. When the room lock pins are fully retracted, the room unlock
limit switch arrangement will send a ground signal to the control
box. The manifold pressure switch will send a ground signal to
the control box when pump pressure reaches 3000 psi. The
sequence will not continue until both signals are received by
the control box.
9. When both the room lock limit switches and the manifold
pressure switch signals are received by the control box, a
+12 signal will open the room retract solenoid valve.
10. When the room is fully retracted, the room in limit switch
arrangement sends a ground signal to the control box. The
manifold pressure switch sends a ground signal to the control
box when the pump pressure reaches 3000 psi. The sequence
will continue when both signals are received by the control
box.
11. When both the room in limit switches and the manifold
pressure switch signals are received by the control box, the
+12 signal to the room unlock valve is turned off and the un-
lock valve closes.
12. A +12 signal opens the room lock valve.
13. When the room lock pins are fully extended, the room lock
limit switch arrangement sends a ground signal to the control
box. The manifold pressure switch sends a ground signal to
the control box when pump pressure reaches 3000 psi.
14. When both the room lock limit switches and the manifold
pressure switch signals are received by the control box, the
pump will shut off. The red pump on light will shut off and the
sequence is complete. The room control switch may be re-
leased.
15. The air seal will inflate when the room control key switch
is turned off or if the ignition switch is turned off. The amber
light on the room control panel will go out.
nal to the control box so the sequence can continue.
the limit switch box, the limit switch box supplies a ground sig-
When the appropriate limit switches complete a +12 circuit for
nected to a central limit switch indicator box for each room.
directly to the control box. The individual switches are con-
The room and lock limit switches are not connected NOTE:
2. Park brake must be set.
turns the room control panel red pump on light ON when the
pump is running.
NOTE: Even though the room does not lock in the extended
position, the system checks to make sure the locks are fully
retracted before proceeding.

MP45.4705
30JAN01
MAINTENANCE
"NOT IN PARK/BRAKE" CHECK
LEVEL SENSING UNIT ADJUSTMENT
SURFACE
MOUNTING
BELOW THE SURFACE MOUNTING
SCREWS (3)
REAR
THIS
SIDE
ON TOP
STICKER
UP
LEVEL SENSING UNIT
SPRINGS (3)
CAUTION: WHEN MAKING THIS CHECK, BLOCK
THE VEHICLES WHEELS SECURELY SO THE VEHICLE
CANNOT ROLL FORWARD OR BACKWARD.
Set the park brake. Switch the ignition to the "ON" position.
Press the "AIR" button one time. Release the parking brake
and confirm that the "NOT IN PARK/BRAKE" indicator light
comes on. Reset the parking brake. The "NOT IN PARK/
BRAKE" indicator light should go out. Switch the ignition to
"OFF".
ROOM EXTENSION PNEUMATIC SEAL
Level the vehicle by placing a circular bubble level in the
center of the freezer floor or location within the vehicle that is
to be level. With the vehicle level, adjust the sensing unit
until all yellow lights are off. This is done by drawing up the
corresponding screw if the sensing unit is mounted below
the surface, as shown, or backing out the corresponding
screw if the sensing unit is mounted above the surface.
Bump the sensing unit to see that it has settled down in the
level position.
Water leakage into the interior of the coach from around the
room may indicate lack of continuous contact by the
pneumatic seal around the room. This can result from a
foreign object caught between the seal and mating surface,
NOTE : 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 (1-800-321-3494)
for service or repair.
a kinked seal, or lack of proper seal inflation. Visually
inspect the seal and it’s extended mating surface by looking
across the top of the room from above the driver’s seat.

PREVOST LEVEL FLOOR WITH LOCKS
HYDRAULIC LINE CONNECTION DIAGRAM
07APR00
MP65.941F
VIEW FROM TANK END
CAP END ROD END
FLOOR UP / DOWN CYLINDER
ROOM
FRONT
CYLINDER
STEEL
TUBE
ROD
END
STEEL
TUBE
ROD
END
ROOM
CYLINDER
REAR
UPPER FRONT
ROOM LOCK
CAP END
ROOM LOCK
UPPER REAR
CAP END
ROD END ROD END
ROD END
ROD END
IMPORTANT: THE ROD END OF THE
ROOM LOCK CYLINDERS MUST
CONNECT TO THE FITTING
ARRANGEMENT ON THE TOP OF
THE MANIFOLD.
LOWER REAR
ROOM LOCK
LOWER FRONT
ROOM LOCK
REAR ROOM
MANIFOLD
IMPORTANT: HOSES FROM
THE ROD END OF THE ROOM
CYLINDERS AND ROD END OF
THE FLOOR UP / DOWN
CYLINDER MUST CONNECT TO
THE SAME MANIFOLD THAT
THE CAP END OF THE
CYLINDERS CONNECT TO.
CAP
END CAP
END
ROOM 2
CAP END CAP END

PREVOST REAR ROOM WITH LOCKS
HYDRAULIC LINE CONNECTION DIAGRAM
07APR00
MP65.942F
VIEW FROM TANK END
ROD END
ROD END
IMPORTANT: THE ROD END OF THE
ROOM LOCK CYLINDERS MUST
CONNECT TO THE FITTING
ARRANGEMENT ON THE TOP OF
THE MANIFOLD.
REAR
ROOM LOCK
FRONT
ROOM LOCK
LEVEL FLOOR
MANIFOLD
IMPORTANT: THE ROD END OF THE ROOM
CYLINDER MUST CONNECT TO THE SAME
MANIFOLD AS THE CAP END OF THE ROOM
CYLINDER.
CAP
END
CAP
END
ROOM CYLINDER
CAP END
ROD END
ROOM 1

MP65.943F
07APR00
HYDRAULIC LINE CONNECTION DIAGRAM
HYDRAULIC SOLENOID VALVE ARRANGEMENT
CHECK VALVE
VALVE RELEASE
" T " HANDLE
ROOM 2
RETRACT
CHECK VALVE
ROOM 1
EXTEND
ROOM 1
RETRACT
3000 PSI
PRESSURE SWITCH
ROOM 2
LOCK
ROOM 2
UNLOCK
ROOM 1
LOCK
ROOM 1
UNLOCK
ROOM 1
FLOOR
DOWN
ROOM 1
FLOOR UP
VIEW FROM MOTOR END
ROOM 2
EXTEND

HYDRAULIC FLOW DIAGRAM
MP65.9459
06NOV02
SINGLE CYLINDER ROOM EXTENSION
CYLINDER
VEHICLE
FIXED TO
PRESSURE
RETURN
STATIONARY POSITION
CHECK
VALVE
EXTEND
CYLINDER
VALVE RETRACT VALVE
CYLINDER

AIR CONNECTION DIAGRAM
MP75.474C
01FEB00
WATER TRAP ASSEMBLY
FOR 110 VOLT AIR COMPRESSOR
B A
ADJUSTABLE
PRESSURE
REGULATOR
PRESSURE SWITCH
SET TO OPEN AT
90 P.S.I. - RESET
AT 60 P.S.I.
AIR COMPRESSOR
CONNECTION
+12 VOLT
NORMALLY OPEN
SOLENOID
+12 VOLT
ACTUATED
RELAY
RELAY CONTACTS - FROM 110 VOLT
SUPPLY TO 110 VOLT COMPRESSOR
9700
6230
NOTE: FOR DETAILS OF THE ELECTRICAL CONNECTIONS BETWEEN THE WATER TRAP AND AIR COMPRESSOR
SEE ELECTRICAL CONNECTION DIAGRAM - SCHEMATIC FOR WATER TRAP TO AIR COMPRESSOR WITH AUXILIARY
PRESSURE SWITCH.
FLOW TO SUSPENSION
FLOW FROM
COMPRESSOR
CHECK VALVE
FLOW