HWH 725 SERIES User manual

OPERATOR’S MANUAL
ML52669/MP04.3387
23SEP13
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
W
CORPORATION
HH
R
RETRACT
EXTEND
CAUTION!
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
HWH COMPUTERIZED LEVELING
AUTO
STORE
LEVEL
AUTO
CANCEL
R
SLOPE
EXCESS
RETRACT
EXTEND
Multiple Slide outs
Four Double - Acting Jacks
FEATURING:
BI-AXIS Hydraulic Leveling
Single Touch - Touch Panel Leveling Control
R
AP52668
Auxiliary Hand Pump
MODE
TRAVEL
BRAKE
PARK/
NOT IN MANUAL
Hydraulic Leveling System
HWH 725 Series, Computer-Controlled
R

WARNING !
READ THE ENTIRE OPERATOR MANUAL BEFORE OPERATING.
BLOCK FRAME AND TIRES SECURELY BEFORE CRAWLING UNDER VEHICLE. DO NOT USE LEVELING JACKS OR
AIR SUSPENSION TO SUPPORT VEHICLE WHILE UNDER VEHICLE OR CHANGING TIRES. VEHICLE MAY DROP
AND/OR MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.
WEAR SAFETY GLASSES WHEN INSPECTING OR SERVICING THE SYSTEM TO PROTECT EYES FROM DIRT, METAL
CHIPS, OIL LEAKS, ETC. FOLLOW ALL OTHER APPLICABLE SHOP SAFETY PRACTICES.
OPERATOR’S MANUAL
KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE DUMPING AIR FROM THE VEHICLE’S SUSPENSION.
DO NOT MOVE THE VEHICLE IF THE VEHICLE IS NOT AT THE PROPER RIDE HEIGHT. CONTACT MANUFACTURER
IMPORTANT: IF COACH IS EQUIPPED WITH A ROOM EXTENSION, READ ROOM EXTENSION SECTION BEFORE
OPERATING LEVELING SYSTEM.
HOW TO OBTAIN WARRANTY SERVICE
THIS IS NOT TO BE INTERPRETED AS A STATEMENT OF WARRANTY
HWH CORPORATION strives to maintain the highest level of
customer satisfaction. Therefore, if you discover a defect or
problem, please do the following:
[phone] OR [phone]. Give your name and
coach was purchased, or the date of system installation,
Notify the dealership where you purchased the
vehicle or had the leveling system installed. Dealership
management people are in the best position to resolve
the problem quickly. If the dealer has difficulty solving
the problem, he should immediately contact the Customer
Service Department, at HWH CORPORATION.
If your dealer cannot or will not solve the problem,
notify the Customer Service Department:
HWH CORPORATION 2096 Moscow Rd. Moscow IA. 52760
address, coach manufacturer and model year, date the
SECOND:
FIRST:
authorization of an independent service facility, to be
defective part, either by appointment at the factory or by the
CORPORATION will authorize repair or replacement of the
determine whether or not your claim is valid. If it is, HWH
HWH CORPORATION personnel will contact you to
during business hours (8:00 a.m. till 5:00 p.m. c.s.t.).
description of the problem, and where you can be reached
determined by HWH CORPORATION. All warranty repairs
must be performed by an independent service facility
authorized by HWH CORPORATION, or at the
HWH CORPORATION factory, unless prior written approval
has been obtained from proper HWH CORPORATION
personnel.
04MAR10
MP14.0002
TECHNICAL SERVICE FOR MOVING THE VEHICLE WHEN NOT AT THE PROPER RIDE HEIGHT.
KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE OPERATING LEVELING SYSTEM OR ROOM EXTENSIONS.

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

CONTROL FUNCTIONS
CONTROL IDENTIFICATION
MP24.4565
08FEB10
CORPORATION
H
CAUTION!
CLEAR OF ROOM WHEN OPERATING.
UNDERSTAND OPERATOR’S MANUAL BEFORE
USING. KEEP PEOPLE AND OBSTRUCTIONS
HYDRAULIC ROOM EXTENSION
OFF
ON
RETRACT
H
W
R
EXTEND ROOM CONTROL
SWITCH
KEY SWITCH
The KEY SWITCH controls power to the ROOM
CONTROL SWITCH. When the KEY SWITCH is in the "ON"
POSITION the room can be operated, and the key cannot be
removed. When the KEY SWITCH is in the "OFF" position
the room cannot be operated, and the key can be removed.
The ROOM CONTROL SWITCH
is a two position momentary switch. Pressing the switch in
the EXTEND POSITION will extend the room. Pressing the
switch in the RETRACT POSITION will retract the room. Re-
leasing the ROOM CONTROL SWITCH will halt the operation
of the room.
ROOM OPERATOR’S PANEL
KEY
KEY SWITCH: ROOM CONTROL SWITCH:

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

OPERATING PROCEDURES
MP34.020
5
03SEP1
4
GENERAL INSTRUCTIONS
PREPARATION FOR TRAVEL
If parking on soft ground or asphalt paving, a wood block or
pad should be placed under each jack.
Any time a hydraulic leveling process is interrupted, retract
the jacks according to the JACK RETRACTION Section and
then restart the leveling process.
If the hand / auto brake is not set when the "AUTO LEVEL"
button is pressed, the "NOT IN PARK/BRAKE" light will
come on. When the "AUTO LEVEL" button is released the
If the jacks are retracted but a red "WARNING" light is lit
the system needs to be serviced.
If the jacks cannot be retracted according to the JACK
RETRACTION Section, retract the jacks according to the
MANUAL JACK RETRACTION Section. The system
should then be checked.
Maintain adequate clearance in all directions for vehicle, room
extensions, awnings, doors, steps, etc. Vehicle may move in
any direction due to jacks extending or retracting, settling of
the jacks or the vehicle, equipment malfunction, etc..
Any room extension, step or generator slide should be fully
DO NOT MOVE THE VEHICLE IF ONE
OR MORE JACKS ARE EXTENDED TO THE GROUND.
WARNING:
"NOT IN PARK/BRAKE" light will go out. The Automatic
retracted before traveling.
Leveling function will not start.
Press the "CANCEL" button or turn the ignition switch
"OFF" at any time to stop the operation of the system.
fail to retract completely, extend the jacks back down
to the ground then retract the jacks again.
NOTE: If the vehicle is parked or stored with the jacks
extended for an extended period of time and the jacks
IMPORTANT: Before traveling, the red jack warning
lights must be off, the "TRAVEL MODE" light must be on
and the vehicle should be at the proper height for travel.
If lights are not correct for travel, retract jack as
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
WARNING: DO NOT MOVE THE VEHICLE WHILE
TRAVELING. CONTACT MANUFACTURER TECHNICAL
SERVICE BEFORE MOVING A VEHICLE THAT IS NOT
AT PROPER TRAVEL HEIGHT.
VEHICLE IS AT THE PROPER RIDE HEIGHT FOR
INTO THE STORE/TRAVEL POSITION AND 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
described in the JACK RETRACTION Section.
ROOM EXTENSION PROCEDURES
It is recommended to retract room extensions before
the Leveling Procedure before operating room extensions.
MUST be blocked securely. It is recommended to complete
If the vehicle is equipped with kick-down jacks, the wheels
extension read this section carefully.
IMPORTANT: If the vehicle is equipped with a room
retracting jacks.
when the vehicle is supported by the leveling system.
Refer to the vehicle owners manual for proper operation of
IMPORTANT: Do not use a room extension support
room extensions.
NOTE: This manual is intended for vehicles with a spring
or air suspension. If the vehicle has an air suspension
with a manual pilot air dump, refer to the vehicle
manufacturer for operating instructions.

MP34.2721
23SEP13
AUTOMATIC HYDRAULIC LEVELING
1. Place transmission in the recommended position for
parking the vehicle and set parking brake. Turn the coach
engine off. Turn the ignition to the "ACCESSORY" position.
2. At this time, the operator may want to check the jacks
and place a pad under each jack if the ground will not
3. Press the "AUTO LEVEL" button one time.
The AUTO LEVEL light will start to flash.
4. Turn the ignition switch to the "OFF" position.
OPERATING PROCEDURES
725 SERIES LEVELING SYSTEM
support the vehicle.
IMPORTANT: During the Automatic Leveling
procedures, pushing the "AUTO LEVEL",
"AUTO STORE" or the "CANCEL" button
on the HWH touch panel will stop the
WARNING:
PERSONS AND OBJECTS ARE CLEAR OF THE VEHICLE.
BUTTON THE OPERATOR MUST BE SURE THAT ALL
PRIOR TO PUSHING THE "AUTO LEVEL"
operation and inhibit proper leveling of the vehicle.
the vehicle engine during leveling can cause erratic
NOTE: If the vehicle has an air suspension, running
NOTE: If the vehicle is equipped with an air suspension
and a manual suspension dump, the suspension air should
be exhausted at this time. Refer to the vehicle manufacturer
for operating instructions.
The leveling process will begin.
automatic leveling function.
EXCESS SLOPE SITUATION: In the event the jacks are
unable to level the coach, the "EXCESS SLOPE" light will
come on. Excess slope is one or more 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.
Pairs of jacks will extend according to lit yellow level lights.
The system will level side to side if needed before leveling
front to rear.
A red jack down light will come on as it’s jack extends
approximately 1 inch. If any red jack down warning light is on,
the TRAVEL MODE light will be off and the master warning
light will be on.
After all yellow level lights are out, the system will
stabilize the vehicle.
vehicle for leveling should have pressure switches that are
ground and lifts the vehicle slightly. Jacks that have lifted the
switch. The switch will turn on when the jack extends to the
is part of the auto level sequence. Each jack has a pressure
Stabilize sequence information:
pump and front valves off.
both front pressure switches are on, the system turns the
pump on and open the valves for both front jacks. When
If either pressure switch is not on, the system will turn the
jacks. The system checks both front jacks at the same time.
rechecking both rear jacks, the system then checks the front
the left rear (extending if necessary). After checking and
will recheck the right rear (extending if necessary) then recheck
If the left rear switch is on (or when it comes on), the system
the left rear jack pressure switch, extending the jack if necessary
If the switch is on (or when it comes on) the system will check
switch is not on, the system will extend the jack as necessary.
The sequence starts with the right rear jack. If the pressure
until the pressure switch turns on.
on, the computer turns the pump and valve on for that jack
is on, the jack is stabilizing the vehicle. If the switch is not
computer checks the jack pressure switches. If the switch
The stabilize procedure is a specific sequence where the
on.
The stabilize sequence
end of the initial leveling and stabilizing sequence.
sequence will only happen if a yellow level light is on at the
automatically repeat the leveling sequence. The repeat
If at this time a yellow level light is on, the system will
the system will turn off, leaving the level light on.
If a yellow level light is still on after the repeat sequence,
light to "bump" the vehicle up slightly to turn that yellow
(extend jacks) that correspond to any lit yellow level indicator
set. If desired, the operator can use the UP ARROWS
ignition is in the ON or ACC. position and the park brake is
is the manual leveling buttons will function anytime the
home. However, a feature of the single step leveling system
normally is not sufficient to cause a level issue for the motor
The slight lift experienced during the stabilizing procedure
indicator light off.

MP34.2819
23SEP13
OPERATING PROCEDURES
725 SERIES LEVELING SYSTEM
a safe parking location is found.
MANUAL JACK RETRACTION Section.
while traveling, the jacks should be checked as soon as
IMPORTANT: If a red warning light and buzzer come on
THE STORE/TRAVEL POSITION AND THE VEHICLE IS AT
the green "TRAVEL" light is on, and the suspension air bags
lights are out, the jacks are in the STORE/TRAVEL position,
3. The vehicle can be moved as soon as the red warning
CHECK THAT ALL JACKS ARE FULLY RETRACTED INTO
WARNING LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY TO
CREATE A DRIVING HAZARD. DO NOT RELY SOLELY UPON
SEVERE DAMAGE TO THE JACKS AND OR THE VEHICLE AND
WITH THE LEVELING JACKS EXTENDED CAN CAUSE
WITH STRAIGHT-ACTING JACKS. MOVING THE VEHICLE
OR IN THE EXTEND POSITION. THIS VEHICLE IS EQUIPPED
LEVELING JACKS ARE STILL IN CONTACT WITH THE GROUND
DO NOT MOVE THE VEHICLE WHILE THE
The system must be allowed to completely finish the 4. If jacks cannot be retracted by the above procedure see
are inflated to the vehicles proper ride height.
DO NOT push the "OFF" button or turn the ignition key.
THE OPERATOR MUST BE SURE THAT
1. Start the engine. Store the jacks immediately.
out. The pump will run with all retract loads staying on until
flash. As each jack retracts, its red WARNING light will go
2. Press the "STORE" button. The store indicator light will
ALL PEOPLE ARE CLEAR OF THE VEHICLE.
THERE ARE NO OBJECTS UNDER THE VEHICLE AND THAT
IMPORTANT: DO NOT interrupt power to the leveling
system while the "STORE" indicator light is blinking.
NOTE: If the vehicle is equipped with an air suspension
and a manual air dump, place the suspension in the
TRAVEL position at this time. Refer to the vehicle
manufacturer for operating instructions.
WARNING:
THE PROPER RIDE HEIGHT.
WARNING:
STORE mode.
JACK RETRACTION
10 seconds after the last red warning light goes out. If any
warning light remains on the pump and all retract loads
will remain on for (6) minutes from the time the "AUTO
STORE" button was pushed.

OPERATING PROCEDURES
MP34.3024
04MAR10
IMPORTANT: Do not continue to push an EXTEND
MANUAL HYDRAULIC OPERATION
1. Place transmission in the recommended position for parking
2. Place pads under the jack feet if the ground will not support
the vehicle on the jacks.
3. 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
4. When leveling is completed, 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.
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.
NOTE: if the vehicle is equipped with a manual
suspension air dump, the air must be exhausted
from the suspension before leveling. Refer to the
vehicle manufacturer for instructions.

OPERATING PROCEDURES
ROOM EXTEND PROCEDURE
1. Follow applicable LEVELING AND STABILIZING
2. Unlock all room-locking devices to include travel
the room remove it before extending the room.
WARNING:
extend the room.
4. To extend the room, press and hold the
ROOM CONTROL SWITCH in the "EXTEND" position
until the room is fully extended.
halt the operation of the room.
5. Turn the room control panel KEY SWITCH to
KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING.
IMPORTANT: Do not use a room extension support
when the vehicle is supported by the leveling system.
NOTE: If a MANUAL RETRACT WINCH is attached to
NOTE: Make sure there is adequate clearance to fully NOTE: Releasing the ROOM CONTROL SWITCH will
3. Turn the room control panel KEY SWITCH to
the "ON" position.
of the room, do not reverse direction of the room until
after the room is fully extended. This assures proper
Hold the switch to "EXTEND" three or four seconds
pressurization of the cylinders.
NOTE:
During normal operation
the room is fully extended. If necessary, the direction
of the room may be reversed, but watch for binding of
the room. If the direction of the room has been
reversed, DO NOT re-extend the room until the room
has been fully retracted.
MP34.4314B
23SEP13
the "OFF" position.
It is recommended to retract room extensions before
DISENGAGED BEFORE OPERATING THE ROOM.
RETRACTING DEVICES ARE DETACHED OR
ALL ROOM LOCKING, CLAMPING OR MANUAL
OPERATOR’S RESPONSIBILITY TO ENSURE THAT
PERSONAL INJURY AND VEHICLE DAMAGE. IT IS THE
DEVICES ATTACHED OR ENGAGED CAN CAUSE
ROOM LOCKING, CLAMPING OR MANUAL RETRACTING
Leveling Procedure before operating room extensions.
NOTE: It is recommended to complete any applicable
retracting a leveling system.
WARNING: OPERATING A ROOM WITH ANY
PROCEDURES.
clamps/locks supplied by manufacturers other than HWH.
NOTE: The park brake must be set to operate the rooms.
room control switch immediately. DO NOT force the
room. DO NOT reverse direction of the room, contact
HWH Customer Service for assistance 1-800-321-3494.
room is fully extended (and down if applicable) or stops moving.
Do not hold the ROOM CONTROL SWITCH
If either side of the room stops moving, release the
in the "EXTEND" position for more than ten seconds after the
IMPORTANT: If the room extension is a level out room,
hold the room control switch to the extend position
until the room is fully extended and has dropped to the
completely lowered position.
IMPORTANT:
FOR ROOMS WITH A LEVEL IN - LEVEL OUT FLOOR MECHANISM
The Level In - Level Out mechanisms have a sub floor
that raises into place after the room has fully extended.
This does not change the room extend procedure.
Make sure to hold the switch to the "EXTEND" position
until the floor has completely lifted to the UP position.

OPERATING PROCEDURES
NOTE: It is recommended to retract room extensions
before retracting a leveling system.
2. Turn the room control panel KEY SWITCH to
3. To retract the room press and hold the
ROOM CONTROL SWITCH in the "RETRACT"
position until the room is fully retracted.
halt the operation of the room.
4. Turn the room control panel KEY SWITCH to
IMPORTANT: Room-locking devices should be locked
while traveling.
WARNING:
CLEAR OF ROOM WHEN OPERATING.
KEEP PEOPLE AND OBSTRUCTIONS
5. If the room will not retract see the MANUAL ROOM
RETRACT PROCEDURE.
NOTE: Releasing the ROOM CONTROL SWITCH will
HWH Customer Service for assistance 1-800-321-3494.
room. DO NOT reverse direction of the room, contact
room control switch immediately. DO NOT force the
If either side of the room stops moving, release the
after the room is fully retracted or stops moving.
in the "RETRACT" position for more than ten seconds
Do not hold the ROOM CONTROL SWITCH
reversed, DO NOT retract the room until the room
the room. If the direction of the room has been
of the room may be reversed, but watch for binding of
the room is fully retracted. If necessary, the direction
of the room, do not reverse direction of the room until
During normal operation
Hold the switch to "RETRACT" three or four seconds
after the room is fully retracted. This assures proper
has been fully extended.
pressurization of the cylinders.
IMPORTANT:
NOTE:
MP34.4509B
23SEP13
1. The park brake must be set. The room will not
operate if the park brake is not set.
the "ON" position.
the "OFF" position.
ROOM RETRACT PROCEDURE
the room must raise completely before it will retract.
If the room will not raise, do not force the room.
Important: if the room extension is a level-out room,
Refer to the MANUAL ROOM LIFT PROCEDURES
page.
If the room extension is a Level In -Level Out room
with a sub floor, the sub floor must drop completely
before the room can retract. If the floor will not retract,
DO NOT force the room. Refer to the "UNIVERSAL
LEVEL IN/LEVEL OUT MANUAL ROOM RETRACT"
page.

"UNIVERSAL PLATFORM LEVEL-OUT" ROOM EXTENSION MECHANISM
MANUAL ROOM LIFT PROCEDURES
ML52670/MP34.9559B
13MAY1
5
OPERATING PROCEDURES
"VALVE OPENED" position as shown.
retract solenoid valves by moving the cams to the
Manually open the valve release cams for the extend and
1. Determine which synchronizing cylinder controls the room.
the room, contact HWH Customer Service for assistance
understood or if the room begins to bind DO NOT force
IMPORTANT: If at any stage something is not
1-800-321-3494.
NOTE: Manual room lift procedures must be done before
manual room retraction procedures.
3. Leave the valves opened and refer to the next page
for room retract procedures.
If the pump manifold is equipped with an auxiliary hand pump
,
you may be able to retract the room by opening only the room
retract valve (as labeled by the wiring harness) and operating
the hand pump, refer to the AUXILIARY HAND PUMP
OPERATION page for instructions on the use of the hand
pump and valves equipped with a release cam. If the room
cannot be retracted with the hand pump, it will be necessar
y
to use the lift bolts and room retract screws.
INCORRECT MOVEMENT OF THE CAMS CAN DAMAGE
THE RELEASE CAMS IN THE CORRECT DIRECTION.
ANY DIRECTION ON THE VALVE. MAKE SURE TO MOVE
IMPORTANT: RELEASE CAM MIGHT BE ROTATED TO
THE VALVES.
NOTE: There may be more than one platform lift cylind
er
assembly There is a manual lift bolt for each assembly
.
All lift bolts must be used to lift the room.
2. Use a 13/16 wrench or socket to rotate the lift bolt(s) clockwise
until they are seated in the receiver block.
IMPACT WRENCH TO TURN LIFT BOLTS.
bolt(s) until the room is completely lifted. When there are
multiple lift bolts, alternate evenly between all lift bolts,
turning each bolt two or three complete turns each time.
Turning one lift bolt without alternating may cause
DO NOT USE AN
Continue to turn the
the room to bind.
ROOM EXTENDED
AND DOWN AND DOWN
ROOM EXTENDED
ROOM EXTENDED
AND UP
IN STORED
LIFT BOLT SHOWN ENGAGED WITH LIFT BOLT SHOWN
RECEIVER BLOCKPOSITION
FULLY LIFTED
WITH ROOM
LIFT BOLT SHOWN
RECEIVER
BLOCK
LIFT BOLT
BLOCK
LIFT BOLT
RECEIVER
DO NOT RETRACT LIFT BOLT UNTIL YOU HAVE READ
"EXTENDING ROOM AFTER SERVICE" ON NEXT PAGE
.
ROOM CONTROL MANIFOLD
TO
CLOSE
LOCATED ON SYNCHRONIZING CYLINDER
VALVE
CLOSED
OPENED
VALVE
OPEN
TO
CYLINDER
RETRACT
EXTEND
CYLINDER
RELEASE CAMS

"UNIVERSAL PLATFORM LEVEL-OUT" ROOM EXTENSION MECHANISM
MANUAL ROOM RETRACT PROCEDURES
ML52670\MP34.9561B
23SEP13
OPERATING PROCEDURES
PLATE
RECEIVER
ROOM EXTENDED
ROOM RETRACTED
PLATE
THREADED
manufacturer.
Using wrench provided,
a personal wrench or a tire iron with a 1-1/8" opening rotate
either mechanism’s threaded rod clockwise 6 complete turns.
the front and one for the rear mechanism should be provided.
1. Start both threaded rods until resistance is met, one for
NOTE: To access the threaded plates refer to vehicle
3. Move to the other room extension mechanism, rotate
the room, contact HWH Customer Service for assistance
understood or if the room begins to bind DO NOT force
IMPORTANT: If at any stage something is not
3 and 4 alternating from mechanism to mechanism rotating
each threaded rod 12 complete turns until room is sealed.
(DO NOT exceed 15 ft.lbs) Make sure the room does not bind.
4. Return to the first room extension mechanism and rotate
the threaded rod clockwise 12 complete turns. Repeat steps
the threaded rod clockwise 12 complete turns.
1-800-321-3494.
Do Not use an impact wrench.
THREADED ROD
PLATE
THREADED
THREADED ROD
NOTE: Manual room lift procedures must be done before
manual room retraction procedures.
2.
NOTE: Leave the solenoid valves open, the lift bolts
and threaded rods in place until the room has been
serviced.
EXTERIOR
WALL
COACH
END VIEW OF
ROOM EXTENDED
END VIEW OF
ROOM RETRACTED
WALL
COACH
EXTERIOR
EXTENDING ROOM AFTER SERVICE
1. Room lift bolts should not be retracted yet. Push and
hold the room switch to "RETRACT" for 5 to 10 seconds.
2. Push the room switch to "EXTEND" until the room is within
1 inch of being fully extended. Threaded rods should be
Do not allow room to bind.
3. Retract all lift bolts completely. If room starts to drop,
alternate between lift bolts evenly while turning lift bolts.
4. After lift bolts are retracted, push room switch to
"EXTEND" until room is fully extended and down. If
room dropped while retracting lift bolts, push room
switch to "EXTEND" for 5 to 10 seconds.
5. Retract room with room switch.
the room, contact HWH Customer Service for assistance
1-800-321-3494.
understood or if the room begins to bind DO NOT force
IMPORTANT: If at any stage something is not
IMPORTANT: DO NOT EXTEND THE ROOM UNTIL THE
ROOM HAS BEEN SERVICED. ANY SOLENOID VALVES
LEFT OPEN SHOULD BE CLOSED. THE THREADED
RODS SHOULD BE COMPLETELY REMOVED BEFORE
ROOM IS FULLY EXTENDED. If there is not enough
room to remove both threaded rods completely, alternate
backing the threaded rods out and slightly extending the
room. Be careful to not extend the room so far that the
threaded rods impact the coach wall or the mechanism.
completely removed at this time.

ML52671/MP34.9575A
23SEP13
OPERATING PROCEDURES
UNIVERSAL LEVEL IN/LEVEL OUT ROOM EXTENSION MECHANISM
MANUAL ROOM RETRACTION PROCEDURES - SPLINED TORSION SHAFT
PAGE 1 OF 2
IMPORTANT: KEEP PEOPLE CLEAR OF THE ROOM
WHEN MANUALLY RETRACTING THE ROOM. MAKE
SURE THERE ARE NO OBJECTS SUCH AS CARPET,
CHAIRS, ETC. BLOCKING OR INTERFERING WITH
THE MOVEMENT OF THE FLOOR OR ROOM.
To manually retract room, first the floor must be completely
lowered. The floor raise / lower mechanism must be accessed
to accomplish this. An area closest to the floor lift cylinder is
the best area to use. A spline wrench which will be needed
to turn the main mechanism spline shaft is wire tied to the
In the event of a hydraulic failure, including the hand pump, if
so equipped, the room and floor can be manually retracted.
1. Determine which synchronizing cylinder controls the room.
Open both valves by moving the valve release cam to the
open position as shown in the following diagram.
IMPORTANT: ONLY MOVE THE RELEASE CAM
IN THE DIRECTION SHOWN. MOVING THE CAM
IN THE OPPOSITE DIRECTION CAN DAMAGE
THE VALVES.
FLOOR LIFT CYL
SIDE VIEW
FLOOR LIFT MECHANISM
3. Access the splined shaft as close to the main floor lift
cylinder as possible. (See floor lift mechanism diagram.)
4. Use the spline wrench provided, to rotate the splined
shaft in the direction shown in the floor lift mechanism
diagram. The floor lift cylinder should extend as the floor
lowers to the store position.
5. When the floor is completely lowered, the room can be
retracted. Proceed to page 2 for manual room retraction
instructions.
NOTE: The floor should not be raised hydraulically or
manually until the system has been serviced.
TORSION SHAFT
SPLINED
TO LOWER FLOOR
ROTATE SPLINED SHAFT
main floor lift cylinder.
2. Locate the pressure control valve. This valve must be
opened to lower the floor. the pressure control valve is wire
tied to the synchronizing cylinder or mounted directly to the
main floor lift cylinder. (See the hydraulic diagram or contact
HWH Corporation) The end of the valve has a 1/4" release
nut. Use a 1/4" nut driver to turn the nut 4 & 1/2" turns
counterclockwise. DO NOT turn the nut more than 5
turns or damage to the valve can occur.
PRESSURE CONTROL VALVE
NUT
1/4" RELEASE
ROOM CONTROL MANIFOLD
LOCATED ON SYNCHRONIZING CYLINDER
RELEASE CAMS
TO
OPEN
CLOSE
TO
OPENED
VALVE
VALVE
CLOSED
CYLINDER
RETRACT
CYLINDER
EXTEND

ML52671/MP34.9576A
23SEP13
PLATE
RECEIVER
ROD
THREADED
ROOM EXTENDED
THREADED
BLOCK
ROOM RETRACTED
BLOCK
THREADED
THREADED
ROD
manufacturer.
the front and one for the rear mechanism should be provided.
2. Start both threaded rods until resistance is met, one for
NOTE: To access the threaded blocks refer to vehicle
to step 2.
retracted. Leave the solenoid valves open and proceed
1. After the floor is completely lowered, the room can be 4. Move to the other room extension mechanism, rotate
the room, contact HWH Customer Service for assistance
understood or if the room begins to bind DO NOT force
IMPORTANT: If at any stage something is not
6. Repeat steps 4 and 5 alternating from mechanism to
mechanism rotating each threaded rod 12 complete
turns until room is sealed. (DO NOT exceed 15
5. Return to the first room extension mechanism and rotate
the threaded rod clockwise 12 complete turns.
the threaded rod clockwise 12 complete turns.
ft.lbs) Make sure the room does not bind.
1-800-321-3494.
Do Not use an impact wrench.
either mechanism’s threaded rod clockwise 6 complete turns.
a personal wrench or a tire iron with a 1-1/8" opening rotate
3. Using wrench provided,
threaded rods impact the coach wall or the mechanism.
Be careful to not extend the room so far that the
threaded rods out and slightly extending the room.
threaded rods completely, alternate backing the
NOTE: If there is not enough room to remove both
ROOM HAS BEEN SERVICED. ANY SOLENOID VALVES
RODS SHOULD BE COMPLETELY REMOVED.
LEFT OPEN SHOULD BE CLOSED AND THE THREADED
IMPORTANT: DO NOT EXTEND THE ROOM UNTIL THE
threaded rods in place until the room has been
NOTE: Leave the solenoid valves open and the
serviced.
PAGE 2 OF 2
UNIVERSAL LEVEL IN/LEVEL OUT ROOM EXTENSION MECHANISM
OPERATING PROCEDURES
MANUAL ROOM RETRACTION PROCEDURES - SPLINED TORSION SHAFT
TO
CLOSE
OPEN
TO
OPENED
VALVE
CLOSED
VALVE
CYLINDER
EXTEND
ROOM CONTROL MANIFOLD
LOCATED ON SYNCHRONIZING CYLINDER
RELEASE CAMS RETRACT
CYLINDER

"UNIVERSAL STRAIGHT OUT" ROOM EXTENSION MECHANISM
MANUAL ROOM RETRACTION PROCEDURES - VALVES WITH RELEASE CAMS
MP34.9580A
14MAY14
OPERATING PROCEDURES
PLATE
RECEIVER
ROD
THREADED
ROOM EXTENDED
THREADED
BLOCK
ROOM RETRACTED
BLOCK
THREADED
THREADED
ROD
manufacturer.
the front and one for the rear mechanism should be provided.
2. Start both threaded rods until resistance is met, one for
NOTE: The valve release cam might be rotated in any
NOTE: To access the threaded blocks refer to vehicle
the open position.
retract solenoid valves by moving the valve release cam to
Manually open the valve release cams for the extend and
1. Determine which synchronizing cylinder controls the room. 4. Move to the other room extension mechanism, rotate
the room, contact HWH Customer Service for assistance
understood or if the room begins to bind DO NOT force
IMPORTANT: If at any stage something is not
6. Repeat steps 4 and 5 alternating from mechanism to
mechanism rotating each threaded rod 12 complete
turns until room is sealed. (DO NOT exceed 15
5. Return to the first room extension mechanism and rotate
the threaded rod clockwise 12 complete turns.
the threaded rod clockwise 12 complete turns.
ft.lbs) Make sure the room does not bind.
1-800-321-3494.
Do Not use an impact wrench.
either mechanism’s threaded rod clockwise 6 complete turns.
a personal wrench or a tire iron with a 1-1/8" opening rotate
3. Using wrench provided, threaded rods impact the coach wall or the mechanism.
Be careful to not extend the room so far that the
threaded rods out and slightly extending the room.
threaded rods completely, alternate backing the
NOTE: If there is not enough room to remove both
ROOM HAS BEEN SERVICED. ANY SOLENOID VALVES
RODS SHOULD BE COMPLETELY REMOVED.
LEFT OPEN SHOULD BE CLOSED AND THE THREADED
IMPORTANT: DO NOT EXTEND THE ROOM UNTIL THE
threaded rods in place until the room has been
NOTE: Leave the solenoid valves open and the
serviced.
direction on the valve. Pushing the release cam in the
wrong direction could damage the valve.
ROOM CONTROL MANIFOLD
LOCATED ON SYNCHRONIZING CYLINDER
RELEASE CAMS
TO
CLOSE
OPEN
TO VALVE
CLOSED
OPENED
VALVE
CYLINDER
EXTEND
RETRACT
CYLINDER

OPERATING PROCEDURES
MP34.9901
23SEP13
AUXILIARY HAND PUMP OPERATION
The auxiliary hand pump can be used to extend or retract
the landing gear, jacks or room extensions anytime the pump
HITCHED TO THE TOW VEHICLE BEFORE OPENING
SUPPORTED BY AUXILIARY STANDS OR SECURELY
ANY VALVES.
WARNING: THE VEHICLE SHOULD BE
IMPORTANT: FOLLOW THE "SET UP" AND
"PREPARATION FOR TRAVEL" PROCEDURES
WHEN USING THE AUXILIARY HAND PUMP.
AUXILIARY
HAND PUMP
HANDLE
The auxiliary hand pump is a two stage pump that will produce
enough pressure to extend the landing gear and lift the vehicle
as well as retract the landing gear. When operating the auxiliary
pump to lift the vehicle or when the jacks are fully retracted, the
pump handle will seem to "snap" as the pump goes to the
second stage. The pumping action will be easier at first as the
second stage starts to create more pressure.
To operate the auxiliary hand pump, open the appropriate
solenoid valve. Insert the hand pump handle into the handle
receptacle and move the handle in an up and down motion.
The auxiliary hand pump may work easier if only one
valve is open at a time. Be careful to not twist the
vehicle if only one solenoid valve is open.
It is recommended to operate the auxiliary hand
pump occasionally to check it’s operation.
FRONT VIEW END VIEW
CLOSE
OPEN
OPERATING
MOTION
will not function.
RELEASE CAM
IMPORTANT: ONLY MOVE THE RELEASE CAM
IN THE DIRECTION SHOWN. MOVING THE CAM
IN THE OPPOSITE DIRECTION CAN DAMAGE
THE VALVES.
RET
JACK
EXT
P42088
LEFT
RET
P42089
RIGHT
EXT JACK
EXT
B-STYLE
RET
P42091
ROOM
TOP VIEW
NOTE: If a room cannot be retracted using the
auxiliary hand pump, see "MANUAL ROOM
RETRACTION PROCEDURES".
NOTE: The hand pump will swivel to any position
which will ease the operation of the hand pump.
number of functions and the items controlled by each pair of
valves one each for the extend and retract procedures. The
NOTE: Each hydraulic function requires a pair of solenoid
solenoid valves will very for each system. The diagrams shown
on this page represent a (3) function system of (2) jacks and
(1) room as indicated by the labels shown in FIG 1. Use the
labels specific to your system when following these procedures.
FIG 1
ROOM
B-STYLE
JACK
RIGHT
EXT
RET
RET
P42089
EXT
P42091
IF A LARGE VALVE IS USED, OPEN THE VALVE
BY REMOVING THE PLASTIC PLUG THEN TURN
THE 1/4" VALVE RELEASE NUT NO MORE THAN
2 FULL TURNS COUNTER CLOCKWISE.
PLUG
PLASTIC
Room control solenoid valves may be located at the
synchronizing cylinder, not on the pump manifold.

MAINTENANCE
MP44.0009
15JAN10
PRIMING THE HAND PUMP
JACK CONTROL HYDRAULIC SWITCH
NEUTRAL POSITION
To prime the hand pump, it will be necessary to remove a
hose from one of the jacks. One of the front jacks would be
HAND PUMP
HANDLE
MOTION
OPERATING
If the system has Double-Acting cylinders on the front,
remove the rod end hose from either of the front jacks.
Place the end of the hose in a bucket. Make sure the
tank is at least half full. Pump the hand pump until a
healthy flow of oil is coming from the hose.
Reattach the hose and retry the hand pump. Repeat the
procedure if the hand pump does not move the jacks.
TANK
best, but use the easiest hose to get to.
IMPORTANT: DO NOT ALLOW THE FLUID LEVEL IN
THE TANK TO LOWER MORE THAN 1 INCH BEFORE
ROD END
CAP END
ADDING FLUID.
If the system has only Single-Acting jacks with return springs,
remove the easiest hose to access and place the end in a
bucket. Using the release cam, manually open the EXTEND
solenoid valve for that jack (if equipped with solenoid valves)
or move the jack control hydraulic switch to "EXTEND" for
that jack. Make sure the tank is at least half full. Pump the
hand pump until a healthy flow of fluid comes from the hose.
procedure if the hand pump does not move the jacks.
Reattach the hose and retry the hand pump. Repeat the
THE TANK TO LOWER MORE THAN 1 INCH BEFORE
IMPORTANT: DO NOT ALLOW THE FLUID LEVEL IN
ADDING FLUID.
EXTEND
POSITION
TO
CLOSED
HANDLE
HAND PUMP
TANK
EXT
RET
EXTEND SOLENOID VALVE
SINGLE ACTING JACKS
(CAP END HOSE -
EXT
EXT
EXT
EXT
RET
RET
RET
RET
OPEN CLOSE
TO
VALVE RELEASE CAM
SHOWN IN
POSITION OPEN
POSITION
SHOWN IN
(CAP AND ROD END HOSES)
DOUBLE-ACTING JACKS
NO ROD END HOSE -
WITH RETRACT SPRINGS)

MAINTENANCE
In general, to insure the smooth operation of the leveling
system, it is a good idea to occasionally check the individual
leveling units to prevent problems. This is especially true
under the unusual conditions stated in the following:
If driving conditions are unusually muddy, the units may
become caked or clogged with mud. This condition may
hamper the proper operation of the leveling system. This
problem may be prevented or remedied by cleaning off each
leveling unit if they become excessively muddy.
In wet or icy weather leveling units may become encrusted
with ice. This may cause the leveling system to function
improperly. To eliminate this problem, periodically check the
leveling units and break loose any ice which may be causing
Do not move the trailer while the leveling units are still in
All major components of the system can be replaced
with rebuilt units or can be sent to HWH CORPORATION to
be rebuilt, when the system is out of warranty.
contact with the ground. Visually check to see if the leveling
units have returned to the STORE/TRAVEL position before
moving the trailer.
MP44.001
6
13NOV1
7
UNUSUAL CONDITIONS
NOTE:
OIL LEVEL
improper operation.
NOT IN PARK/BRAKE CHECK
should now function.
button and set the park brake. The leveling system
LEVEL" button is pushed. Release the "AUTO LEVEL"
BRAKE" indicator light should come on while the "AUTO
Push the "AUTO LEVEL" button. The "NOT IN PARK/
WARNING:
CANNOT ROLL FORWARD OR BACKWARD.
THE COACH WHEELS SECURELY SO THE COACH
to the "ACC" or "ON" position. Release the parking brake.
Apply the brake so the coach cannot roll. Turn the ignition
WHEN MAKING THIS CHECK, BLOCK
qualified RV repair center, your vehicle or coach
or if there are other problems or questions, consult a
If any of the above checks or inspections reveal a problem
manufacturer, or HWH CORPORATION
for service or repair.
WINTER WEATHER DRIVING
components, such as HWH jacks.
have dried. This can facilitate corrosion of metallic
Anti-icing / deicing agents when splashed on your vehicle,
continue to absorb moisture from the air even after they icing / deicing agents, thoroughly wash jacks with warm
To help reduce the corrosion of jacks after exposure to anti
-
soapy water.
and steps should be fully retracted before checking fluid
level. The oil reservoir is part of the pump / manifold
assembly. The oil level is checked and filled through the
breather cap. Clear any dirt away from the breather / filler
cap before removing.
Any HWH hydraulic equipment, including jacks, slide-outs
servicing of the coach.
All maintenance should be done as part of the normal
there is an oil leak in the system.
purchased and then once every two years. More often if
The oil level should be checked when the vehicle is first
brake fluid or hydraulic jack fluid. Use of these can damage
and can cause staining should a leak occur. DO NOT USE
HWH Specialty Hydraulic Oil is recommended. In an
Dexron automatic transmission fluid contains red dye
emergency Dexron automatic transmission fluid can be used
.
NOTE: Overfilling the tank can cause leakage of oil
should be between the bottom of the dipstick and the
reservoir. Most breather caps have a dipstick. Fluid level
The oil level should be within one inch of the top of the
through the breather cap.
center mark.
FLUID:
seals.
NOTE:

SENSING UNIT MAINTENANCE/SERVICE
SENSING UNIT ADJUSTMENT / WITH ADJUSTING ENHANCEMENT
NOTE: If opposing LED’s are lit, there is a problem with
the Sensing Unit.
If LED (A) is lit: Tighten adjustment screw number 1
until the LED is off.
If LED (C) is lit: Loosen adjustment screw number 1
until the LED is off.
If LED (B) is lit: Loosen adjustment screw number 3
until the LED is off.
until the LED is off.
If LED (D) is lit: Tighten adjustment screw number 3
09NOV10
MP44.1511
With the vehicle level according to the bubble level, if there
are no yellow lights lit on the Touch Panel, the sensing unit is
properly adjusted. If there are yellow LEVEL lights lit on the
Touch Panel, manual adjustments to the Sensing Unit are
needed.
SENSING UNIT ACCURACY TOLERANCE
The sensing unit has an accuracy tolerance of ± 5.4 inches front to rear and
INSTRUCTION SHEET
± 1 inch side to side on a 36 foot vehicle. Typical leveling results will be better.
IMPORTANT: THE SENSING UNIT MOUNTING SPRINGS
SHOULD BE COMPRESSED ABOUT 1/2 THEIR FREE
LENGTH. SCREW NUMBER 2 SHOULD NOT BE TURNED
MOUNTED BELOW
FRONT
MOUNTING SURFACE
(3) MOUNTING
(3) MOUNTING
SCREWS
SPRINGS
THIS
SIDE
UP
LED A - FRONT OF VEHICLE
LED B - LEFT SIDE OF VEHICLE
LED C - REAR OF VEHICLE
LED D - RIGHT SIDE OF VEHICLE
REMOTE MOUNTED "POTTED" ELECTRONIC SENSING UNIT
WHILE ADJUSTING THE SENSING UNIT. AFTER
ADJUSTING THE SENSING UNIT, BUMP THE SENSING
UNIT TO SEE THAT IT IS SETTLED TIGHT AGAINST ALL
THREE SCREW HEADS AND STILL INDICATES THAT
THE UNIT IS LEVEL.
Level the vehicle by placing a bubble level in the center of the
freezer floor or upon whichever surface within the vehicle that
is to be level. It is best if the level is placed close to the
mounting area of the sensing unit. Using the Leveling System
and the bubble level, ignoring the yellow LEVEL lights on the
Touch Panel, level the vehicle until the bubble is centered.
The ignition (motorized units) or master power switch (towable
units) must be on. Remove the "Adjusting Enhancement Cap".
DO NOT LOSE THIS CAP. There is a small pin beneath the
cap. Use a jumper wire with an alligator clip to apply a ground
to the pin. This will make the sensing unit very sensitive. The
yellow lights may "jump" around while adjusting the sensing unit.
Let the lights settle down after each adjustment. Small, gentle
turns will work best. Turn mounting screws 1 and 3 to adjust
the sensing unit. Turn screws as instructed to turn out all the
yellow LEDs. When all the LEDs are out, remove the jumper
wire and replace the adjusting enhancement cap. DO NOT
over tighten.
SENSING UNIT
BOTTOM VIEW OF
LED
3
D
C
LED
LED
ABYELLOW LEDs
2
MOUNTING/ADJUSTMENT
SCREWS (3)
1
LED
Move the vehicle to an unlevel position and level the
vehicle according to the yellow level sensing lights on
the touch panel. Readjust if necessary.
ADJUSTING
ENHANCEMENT
CAP