H
W
CORPORATION
H
R
OPERATOR’S MANUAL
R
HWH COMPUTER-CONTROLLED
725 SERIES LEVELING SYSTEM
FEATURING:
Touch Panel Leveling Control
BI-AXIS Hydraulic Leveling
R
Straight-Acting Jacks
Auxiliary Hand Pump
Canopy Lift
R
HWH COMPUTERIZED LEVELING
EXCESS
SLOPE
AUTO
LEVEL
NOT IN
PARK/
BRAKE
AUTO
STORE
TRAVEL
CANCEL
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
MODE
WARNING!
EXTEND
MANUAL
RETRACT
EXTEND
RETRACT
2096 Moscow Road | Moscow, Iowa 52760
Ph: 800/321-3494 (or) 563/724-3396 | Fax: 563/724-3408
AP49234
HWH CORPORATION
(On I-80, Exit 267 South)
www.hwh.com
ML49233/MP04.3380
23SEP11
OPERATOR’S MANUAL
WARNING !
READ THE ENTIRE OPERATOR’S MANUAL BEFORE OPERATING.
BLOCK FRAME AND TIRES SECURELY BEFORE CRAWLING UNDER VEHICLE. DO NOT USE LEVELING JACKS OR AIR
SUSPENSION TO SUPPORT VEHICLE WHILE UNDER VEHICLE OR CHANGING TIRES. VEHICLE MAY DROP AND/OR
MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.
KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE LEVELING SYSTEM IS IN USE.
WHILE HITCHING OR UNHITCHING, AVOID AREAS WHERE BODY MAY BE CRUSHED BY SUDDEN DROPPING OR SLIDING
OF THE TRAILER.
DO NOT LIFT TOW VEHICLE WITH LEVELING SYSTEM.
NEVER PLACE HANDS OR OTHER PARTS OF THE BODY NEAR HYDRAULIC LEAKS. OIL MAY PENETRATE SKIN
CAUSING INJURY OR DEATH.
WEAR SAFETY GLASSES WHEN INSPECTING OR SERVICING THE SYSTEM TO PROTECT EYES FROM DIRT, METAL
CHIPS, OIL LEAKS, ETC. FOLLOW ALL OTHER APPLICABLE SHOP SAFETY PRACTICES.
IMPORTANT: IF VEHICLE IS EQUIPPED WITH A ROOM EXTENSION, READ ROOM EXTENSION SECTION BEFORE
OPERATING LEVELING SYSTEM.
KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE CANOPY IS RAISING OR LOWERING.
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:
FIRST:
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.
SECOND:
notify the Customer Service Department:
HWH CORPORATION 2096 Moscow Rd. Moscow IA. 52760
(563) 724-3396 OR (800) 321-3494. Give your name and
address, coach manufacturer and model year, date the
coach was purchased, or the date of system installation,
Notify the dealership where you purchased the
If your dealer cannot or will not solve the problem,
description of the problem, and where you can be reached
during business hours (8:00 a.m. till 5:00 p.m. c.s.t.).
HWH CORPORATION personnel will contact you to
determine whether or not your claim is valid. If it is, HWH
CORPORATION will authorize repair or replacement of the
defective part, either by appointment at the factory or by the
authorization of an independent service facility, to be
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.
MP14.0020
23SEP11
CONTROL IDENTIFICATION
725 SERIES LEVELING SYSTEM
COMPUTER-CONTROL
AUTO LEVEL
Indicator light
"AUTO LEVEL"
Button
"NOT IN PARK"
Indicator light
STORE
Indicator light
"AUTO STORE"
Button
AUTO LEVEL/STORE
"CANCEL" Button
"TRAVEL MODE"
Indicator light
RAISE LEFT SIDE
Manual button
LOWER LEFT SIDE
Manual button
"EXCESS SLOPE"
Indicator light
R
HWH COMPUTERIZED LEVELING
EXCESS
SLOPE
NOT IN
PARK/
BRAKE
TRAVEL
MODE
EXTEND
MANUAL
RETRACT
AUTO
LEVEL
AUTO
STORE
CANCEL
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
WARNING!
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
EXTEND
RETRACT
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
CONTROL FUNCTIONS
CONTROL BUTTONS
"CANCEL" BUTTON:
any leveling system operation.
"AUTO LEVEL" BUTTON:
start the automatic leveling function.
"AUTO STORE" BUTTON:
four jacks at the same time.
EXTEND BUTTONS (UP ARROWS):
extend their respective jack pairs to lift the vehicle.
RETRACT BUTTONS (DOWN ARROWS):
will retract their respective jack pairs to lower the vehicle.
AUTO LEVEL INDICATOR LIGHT:
during the automatic leveling function.
STORE INDICATOR LIGHT:
the automatic store function.
Push this button to stop
Push this button any time to
Push this button to retract all
These buttons will
These buttons
INDICATOR LIGHTS
This light will flash
This light will flash during
INDICATOR LIGHTS (CONTINUED)
WARNING LIGHTS:
yellow level indicators are jacks down WARNING lights.
They are functional only when the ignition is in the "ON"
or "ACC" position, the system is on, and the jacks are
extended 1/4 to 1/2 inch.
LEVELING LIGHTS:
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.
"EXCESS SLOPE" LIGHT:
the leveling system cannot level the vehicle.
"NOT IN PARK/BRAKE" LIGHT:
when the hand/auto brake is not set and the "AUTO LEVEL"
button is being pushed.
"TRAVEL MODE" LIGHT:
when the ignition is on, when the jacks are retracted and
there are no red WARNING lights on.
The four red lights surrounding the
The four yellow indicating lights are
This indicator will light when
This indicator will light
This indicator light will be on
MP24.3156
23SEP11
CONTROL IDENTIFICATION
CANOPY LIFT OPERATOR’S PANEL
R
W
CORPORATION
H
H
HYDRAULIC ROOM EXTENSION
KEY SWITCH
OFF
ON
EXTEND
CAUTION!
UNDERSTAND OPERATOR’S MANUAL BEFORE
USING. KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING.
KEY
RETRACT
CONTROL FUNCTIONS
KEY SWITCH: LIFT CONTROL SWITCH:
CONTROL SWITCH and the leveling system touch panel.
When the KEY SWITCH is in the "ON" POSITION the lift and
the leveling system can be operated, and the key cannot be
removed. When the KEY SWITCH is in the "OFF" position
the lift and the leveling system cannot be operated, and the
key can be removed.
The KEY SWITCH controls power to the LIFT
a two position momentary switch. Pressing the switch in the
EXTEND POSITION will raise the canopy. Pressing the switch
in the RETRACT POSITION will lower the canopy. Releasing
the LIFT CONTROL SWITCH will halt the operation of the lift.
LIFT CONTROL
SWITCH
The LIFT CONTROL SWITCH is
MP24.5681
23SEP11
CONTROL IDENTIFICATION
PUMP RUN TIME
PUMP RUN TIME
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
to cool can damage the motor.
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.
SYSTEM VARIATIONS FOR PUMP RUN TIME
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.
DO NOT run the pump more than four or six minutes without allowing the pump motor to cool for
For cold weather information see "COLD WEATHER OPERATIONS" below.
DO NOT run the pump more than four or six minutes without allowing the
It is important that any time the pump
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.
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.
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
on.
DO NOT continue without allowing the pump motor to cool for thirty minutes.
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
system will not operate until the reset switch is pushed.
DO NOT continue without allowing the pump motor to
cool for thirty minutes.
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.
Contact HWH corporation to get specific information about the system in this vehicle.
LIGHTED RESET SWITCH
DO NOT continue without allowing
DO NOT turn the system
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.
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 to cool can damage the motor.
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
MP25.9995
14MAR12
OPERATING PROCEDURES
GENERAL INSTRUCTIONS
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..
If parking on soft ground or asphalt paving, wood blocks or
pads must be placed under the jacks.
PREPARATION FOR TRAVEL
Before traveling, the red jack warning lights must be off
and the "TRAVEL MODE" light must be on. If lights are
not correct for travel, retract jack as described in the
JACK RETRACTION Section.
If the jacks are retracted but a red "WARNING" light is lit
or the green "TRAVEL MODE" light is not lit, the system
needs to be serviced.
The canopy should be fully retracted before traveling.
The master power switch and the canopy lift control panel
key switch should be off while traveling.
DO NOT MOVE THE VEHICLE WHILE WARNING:
THE LEVELING JACKS ARE STILL IN CONTACT WITH
THE GROUND OR IN THE EXTEND POSITION. THIS
VEHICLE IS EQUIPPED WITH STRAIGHT-ACTING JACKS.
Press the "CANCEL" button and turn the master power switch
"OFF" at any time to stop the operation of the system.
WARNING:
OR MORE JACKS ARE EXTENDED TO THE GROUND.
The HWH or OEM supplied master power switch must be
on for the leveling system or canopy to operate.
MOVING THE VEHICLE WITH THE LEVELING JACKS
EXTENDED CAN CAUSE SEVERE DAMAGE TO THE JACKS
AND OR THE VEHICLE AND CREATE A DRIVING
HAZARD. DO NOT RELY SOLELY UPON WARNING
LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY
TO CHECK THAT ALL JACKS ARE FULLY RETRACTED
INTO THE STORE/TRAVEL POSITION.
Any time the "AUTO LEVEL" button has been pushed, push
the "STORE" button before traveling.
If the jacks cannot be retracted according to the STORING
JACK Section, retract the jacks according to the MANUAL
JACK RETRACTION Section. The system should then be
checked.
DO NOT MOVE THE VEHICLE IF ONE
MP34.0242
23SEP11
OPERATING PROCEDURES
AUTOMATIC HYDRAULIC LEVELING
The trailer must be unhitched from the tow vehicle before
leveling the trailer.
NOTE: Refer to the trailer manufacturers owner’s
manual for unhitching instructions.
The trailer master power switch and the canopy lift control
panel key switch must be on to operate the HWH leveling
system jacks. The HWH panel will function in the manual
mode with the master power switch and HWH key switch
on.
The HWH front jacks may be used to lift the trailer for
unhitching. Use the front UP ARROW button on the HWH
touch panel to extend the front jacks.
NOTE: Before extending the front jacks or leveling the
trailer, the operator may want to check the jacks and
place pads under the jacks if the ground will not
support the trailer.
If the rear yellow level light is on after unhitching, the front
of the trailer should be lowered until the rear level light is
off before starting the automatic leveling procedure.
AUTOMATIC LEVELING
Press the "AUTO LEVEL" button one time.
The AUTO LEVEL light will start to flash.
IMPORTANT: During the Automatic Leveling procedures,
pushing the "AUTO LEVEL", "AUTO STORE" or the
"CANCEL" button on the HWH touch panel will stop
the automatic leveling function.
AUTO LEVEL SEQUENCE: During the automatic
leveling sequence, after the system has extended the
appropriate jacks to level the vehicle and has turned
the yellow level indicator lights off, the system will
then stabilize the vehicle.
Each jack has a pressure switch. The switch will turn on
when the jack extends to the ground and lifts the vehicle
slightly. Jacks that have lifted the vehicle for leveling
should have pressure switches that are on.
The stabilize procedure is a specific sequence where the
computer checks the jack pressure switches. If the switch
is on, the jack is stabilizing the vehicle. If the switch is not
on, the computer turns the pump and valve on for that jack
until the pressure switch turns on.
The sequence starts with the right rear jack. If the pressure
switch is not on, the system will extend the jack as necessary.
If the switch is on (or when it comes on) the system will check
the left rear jack pressure switch, extending the jack if necessary
If the left rear switch is on (or when it comes on), the system
will recheck the right rear (extending if necessary) then recheck
the left rear (extending if necessary). After checking and
rechecking both rear jacks, the system then checks the front
jacks. The system checks both front jacks at the same time.
If either pressure switch is not on, the system will turn the
pump on and open the valves for both front jacks. When
both front pressure switches are on, the system turns the
pump and front valves off.
If at this time a yellow level light is on, the system will
automatically repeat the complete leveling and stabilizing
sequence. The repeat sequence will only happen if a
yellow level light is on at the end of the initial leveling
and stabilizing sequence.
If a yellow level light is still on after the repeat sequence,
the system will turn off, leaving the level light on.
The slight lift experienced during the stabilizing procedure
normally is not sufficient to cause a level issue for the motor
home. However, a feature of the single step leveling system
is the manual leveling buttons will function anytime the
ignition is in the ON or ACC. position and the park brake is
set. If desired, the operator can use the UP ARROWS
(extend jacks) that correspond to any lit yellow level indicator
light to "bump" the vehicle up slightly to turn that yellow
indicator light off.
EXCESS SLOPE SITUATION:
unable to level the coach, the "EXCESS SLOPE" light will
come on. Excess slope is one or two jacks fully extended
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 be extended. The system will shut
off leaving the "EXCESS SLOPE" light on. The "EXCESS
SLOPE" light will remain on if there is power to the control
box, until the jacks have been fully retracted using the
"STORE" button, turning the red warning lights out. Refer
to the HITCHING AND STORING JACKS section. Move
the trailer to a more level position or level the trailer as close
as possible according to the MANUAL LEVELING section.
Manual leveling will operate when the EXCESS SLOPE
light is on.
The canopy lift control panel key switch should be off when
the leveling system or canopy lift are not in use.
In the event the jacks are
MP34.2727
23SEP11
OPERATING PROCEDURES
HITCHING AND STORING JACKS
WARNING:
THERE ARE NO OBJECTS UNDER THE TRAILER AND
THAT ALL PEOPLE ARE CLEAR OF THE TRAILER.
THE OPERATOR MUST BE SURE THAT
HITCHING
1. The master power switch and the HWH canopy lift control
panel key switch must be on to hitch the trailer and store the
jacks.
The manual UP (extend jacks) and DOWN (retract jacks)
arrows will function anytime the master power switch and
the HWH canopy lift control panel key switch are on if the
"AUTO LEVEL" or AUTO STORE lights are not flashing.
STORING JACKS
1. After the trailer is securely hitched to the tow vehicle,
press the "AUTO STORE" button. The store indicator
light will flash. The front jacks will retract for 5 seconds
before the rear jacks will begin to retract. As each jack
retracts, its red WARNING light will go out. The system
will automatically shut down 1 minute after the four
individual red "WARNING" lights are out. If any one red
"WARNING light does not go out, the system will continue
to store for fifty minutes, then shut down regardless of
the "WARNING" lights condition.
IMPORTANT: During the Automatic Store procedures,
pushing the "AUTO LEVEL", "AUTO STORE" or the
"CANCEL" button on the HWH touch panel will stop
the automatic store function.
2. Push the rear down arrow (RETRACT button) until
the weight of the trailer is off the rear jacks.
3. Hitch the trailer to the tow vehicle according to the
manufacturers instructions. Use the existing landing
gear or the front UP (EXTEND jacks) and DOWN
(RETRACT jacks) arrows.
NOTE: If the trailer is equipped with an air suspension,
it is recommended to not connect the tow vehicle air
supply to the trailer until the trailer is hitched to the
tow vehicle and the jacks are not touching the ground.
WARNING:
IF THE TRAILER IS HITCHED TO A TOW VEHICLE
OR SECURELY SUPPORTED BY THE AUXILIARY
JACKS.
WARNING:
LEVELING JACKS ARE STILL IN CONTACT WITH THE GROUND
OR IN THE EXTEND POSITION. THIS TRAILER IS EQUIPPED
WITH STRAIGHT-ACTING JACKS. MOVING THE TRAILER
WITH THE LEVELING JACKS EXTENDED CAN CAUSE
SEVERE DAMAGE TO THE JACKS AND OR THE TRAILER AND
CREATE A DRIVING HAZARD. DO NOT RELY SOLELY UPON
WARNING LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY TO
CHECK THAT ALL JACKS ARE FULLY RETRACTED INTO
THE STORE/TRAVEL POSITION.
ONLY USE THE "STORE" BUTTON
DO NOT MOVE THE TRAILER WHILE THE
NOTE: When traveling thermal expansion may cause
a jack to extend slightly. When the "AUTO STORE"
button has been used to retract the jacks, the system
will automatically retract any jack that extends due to
thermal expansion.
IMPORTANT: If power to the system is interrupted after
starting a store procedure the store procedure should be
reinitiated and the jacks should be completely retracted
with all four red WARNING lights out prior to traveling.
2. Turn the master power switch and HWH key switch off
before traveling.
3. The trailer can be moved as soon as the red warning
lights are out, the jacks are in the STORE/TRAVEL position
and the green "TRAVEL MODE" light is on.
If jacks cannot be retracted by the above procedure see the
MANUAL JACK RETRACTION section.
MP34.2823
23SEP11
OPERATING PROCEDURES
MANUAL TOUCH PANEL OPERATION
The trailer must be unhitched from the tow vehicle before
leveling the trailer.
NOTE: Refer to the trailer manufacturers owner’s
manual for unhitching instructions.
The trailer master power switch and the canopy lift control
panel key switch must be on to operate the HWH leveling
system jacks. The HWH panel will function in the manual
mode with the master power switch and HWH key switch
on.
The HWH front jacks may be used to lift the trailer for
unhitching. Use the front UP ARROW button on the
HWH touch panel to extend the front jacks.
NOTE: Before extending the front jacks or leveling the
trailer, the operator may want to check the jacks and
place pads under the jacks if the ground will not
support the trailer.
The vehicle may be leveled using the manual EXTEND
(UP ARROW) buttons or RETRACT (DOWN ARROW)
buttons on the right half of the panel. If a yellow LEVEL
SENSING light is on, that side, end or corner of the vehicle
is low. It is best to level the vehicle side to side first, if
needed, before front to rear.
Jacks will extend (or retract) in pairs to raise (or lower) a
side or end of the trailer.
Any jack not used for leveling can be extended to the ground.
This provides additional stability against wind and activity in
the trailer. Jacks used to stabilize the trailer after leveling is
complete should lift the trailer slightly after touching the
ground.
IMPORTANT: DO NOT CONTINUE TO PUSH AN EXTEND
BUTTON FOR MORE THAN TEN (10) SECONDS AFTER
THAT PAIR OF JACKS ARE FULLY EXTENDED.
Turn the canopy control panel key switch off anytime the
leveling system or canopy lift is not in use.
MP34.3040
23SEP11
OPERATING PROCEDURES
CANOPY LIFT RAISE PROCEDURE
WARNING: KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF CANOPY WHEN OPERATING.
NOTE: Make sure there is adequate clearance to fully
extend the canopy.
1. Insert the KEY and turn the KEY SWITCH to the "ON"
POSITION. The trailer master power switch must be on.
2. To raise the canopy, press and hold the LIFT CONTROL
SWITCH in the "EXTEND" POSITION. When the canopy is
fully raised, release the LIFT CONTROL SWITCH.
IMPORTANT:
the "EXTEND" POSITION for more than ten seconds after the
canopy is fully extended or stops moving.
OF THE CANOPY STOPS MOVING, RELEASE THE LIFT
CONTROL SWITCH IMMEDIATELY.
Do not hold the LIFT CONTROL SWITCH in
IF EITHER SIDE
CANOPY LOWER PROCEDURE
WARNING:
CLEAR OF CANOPY WHEN OPERATING.
1. Insert the KEY and turn the KEY SWITCH to the "ON"
POSITION. The trailer master power switch must be on.
KEEP PEOPLE AND OBSTRUCTIONS
NOTE: Releasing the LIFT CONTROL SWITCH will halt
the operation of the lift.
IMPORTANT: AS THE CANOPY BECOMES FULLY
EXTENDED, ONE FRONT AND ONE REAR SAFETY
LOCK SHOULD SNAP INTO PLACE. MAKE SURE
THESE LOCKS ARE IN THE CORRECT POSITION
FOR A RAISED CANOPY.
3. Turn the KEY SWITCH to the "OFF" POSITION.
4. Remove the KEY to prevent undesired operation of the lift.
IMPORTANT:
the "RETRACT" POSITION for more than ten seconds after the
canopy is fully retracted or stops moving.
OF THE CANOPY STOPS MOVING, RELEASE THE LIFT
CONTROL SWITCH IMMEDIATELY.
Do not hold the LIFT CONTROL SWITCH in
IF EITHER SIDE
2. Release the canopy safety locks. There is one front and
one rear lock. They are on opposite sides of the trailer. Pull
up on the safety lock release handle to move the safety lock.
If necessary, push the canopy control switch to EXTEND to
raise the canopy so the safety locks can be released.
3. To lower the canopy, press and hold the LIFT CONTROL
SWITCH in the "RETRACT" POSITION. When the canopy is
fully retracted, release the LIFT CONTROL SWITCH.
NOTE: The pump will not run while the canopy
is lowering.
CANOPY RAISED
CANOPY SAFETY LOCKS
LOCK RELEASE HANDLE
PULL UP TO RELEASEPULL UP TO RELEASE
NOTE: Releasing the LIFT CONTROL SWITCH will halt
the operation of the lift.
4. Turn the KEY SWITCH to the "OFF" POSITION.
5. Remove the KEY to prevent undesired operation of the lift.
6. If the room will not retract see the MANUAL CANOPY LOWER
PROCEDURE.
LOCK RELEASED
POSITIONPOSITION
MP34.4325
23SEP11
OPERATING PROCEDURES
AUXILIARY HAND PUMP OPERATION
LEVELING SYSTEM
WARNING:
CLEAR OF TRAILER WHEN OPERATING THE
LEVELING SYSTEM.
The auxiliary hand pump can be used to extend the jacks
anytime the pump will not function.
The auxiliary hand pump is a two stage pump that will
produce enough pressure to extend the jacks and lift the
vehicle. When operating the auxiliary pump to lift the
vehicle, 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(s). Insert the hand pump handle into the handle
receptacle and move the handle in a fore and aft motion.
KEEP PEOPLE AND OBJECTS
AUXILIARY HAND
PUMP HANDLE
EXTENDING JACKS
To extend jacks use the valve release cam to open the
appropriate valve(s).
Operate hand pump in a fore and aft motion to extend
jacks or lift the canopy.
Note: It is best if jacks are extended in pairs; both front,
both rear, right front & right rear or left front & left rear.
Return valve release cams to valve closed
position when finished.
RETRACTING JACKS
WARNING:
RELEASES IF HITCHING THE TRAILER TO THE TOW
VEHICLE OR IF THE TRAILER IS SUPPORTED BY THE
AUXILIARY MANUAL JACK(S). ALLOW AMPLE ROOM
FOR THE VEHICLE TO MOVE IN ANY DIRECTION WHEN
A JACK MANIFOLD VALVE IS OPENED. OPEN THE
VALVE RELEASE CAMS SLOWLY TO KEEP THE TRAILER
FROM DROPPING RAPIDLY. TRAILER WILL DROP WHEN
THE JACK RETRACT MANIFOLD VALVE IS OPENED.
The hand pump is not needed to retract the jacks. Move the
retract valve cam release to the opened position to retract a
jack.
ONLY USE THE RETRACT VALVE CAM
JACK EXTEND
VALVES (4)
JACK RETRACT
VALVES (4)
(ON BOTTOM SIDE
OF THE MANIFOLD)
SIDE VIEW OF
JACK MANIFOLD &
POWER UNIT
It is recommended to retract the rear jacks before retracting
the front jacks.
When the jacks are fully retracted, move the retract valve
cam releases to the valve closed position.
JACK EXTEND
VALVES (4)
TOP VIEW OF
JACK MANIFOLD &
POWER UNIT
RIGHT FRONT
LEFT FRONT
RIGHT REAR
LEFT REAR
OPEN
CLOSED
VALVE
CLOSE
VALVE
CAM
RELEASE
OPENED
VALVE
MP34.9905
26SEP11
OPERATING PROCEDURES
AUXILIARY HAND PUMP OPERATION
CANOPY LIFT
WARNING:
TRAILER WHEN OPERATING THE CANOPY LIFT.
The auxiliary hand pump can be used to raise the
canopy lift anytime the pump will not function.
The auxiliary hand pump is a two stage pump that
will produce enough pressure to lift the canopy.
When operating the auxiliary pump to lift the canopy,
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 a fore and aft motion.
KEEP PEOPLE CLEAR OF THE
AUXILIARY HAND
PUMP HANDLE
LIFTING THE CANOPY
Move the canopy lift valve release cam
to the valve open position.
Operate the hand pump handle in a fore and aft motion
until the canopy is fully lifted.
The canopy safety locks should snap into place
as the canopy becomes fully lifted.
CANOPY RAISED
POSITION POSITION
LOCK RELEASE HANDLE
PULL UP TO RELEASEPULL UP TO RELEASE
LOCK RELEASED
LOWERING THE CANOPY
SIDE VIEW OF
JACK MANIFOLD &
POWER UNIT
Release the canopy safety locks. There is a front and rear
safety locks on opposite sides of the trailer.
NOTE: It may be necessary to raise the canopy slightly
to release the safety locks.
Slowly move the canopy lower valve release cam to the
valve opened position. The canopy should lower without
using the auxiliary hand pump.
When the canopy is fully lowered, move the canopy lower
valve cam release to the valve closed position.
CANOPY
CANOPY
LOWER VALVE
OPEN
VALVE
CLOSED
VALVE RELEASE CAMS
LIFT VALVE
CLOSE
VALVE
OPENED
SIDE VIEW OF
CANOPY LIFT
MANIFOLD
MP34.9906
23SEP11
MAINTENANCE
OIL LEVEL
All maintenance should be done as part of the normal
servicing of the coach.
The oil level should be checked when the vehicle is first
purchased and then once every two years. More often if
there is an oil leak in the system.
All jacks and the canopy lift should be completely retracted
before checking the oil 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. The oil level
should be within one inch of the top of the reservoir.
Most breather caps have a dipstick.
ELECTRICAL SYSTEM
The batteries should be in good condition and fully charged.
Weak batteries can cause erratic operation. Battery cable
terminals and battery posts and connections should be kept
clean.
JACKS
NOTE: Overfilling the tank can cause leakage of oil
through the breather cap.
FLUID: HWH Specialty Hydraulic Oil is recommended. In an
emergency Dexron automatic transmission fluid can be used.
NOTE:
and can cause staining should a leak occur. DO NOT USE
brake fluid or hydraulic jack fluid. Use of these can damage
seals.
All electrical connections, especially ground connections,
should be clean, tight, free from corrosion and protected
from weathering.
Dexron automatic transmission fluid contains red dye
There are very few user serviceable parts on the jacks
The jacks require very little maintenance. If the jacks are
extremely dirty with caked on mud they should be washed.
CANOPY LIFT
The HWH lift mechanisms need no maintenance.
DO NOT grease or lubricate any parts of the HWH
mechanism.
VISUAL INSPECTION
Periodically inspect the system for oil leaks and
damaged or missing parts, such as pivot bolts or springs.
Check the hydraulic lines and wiring for damage and wear.
Check that the jacks do not interfere with any parts of the
vehicle when they are in the "STORE" position.
OPERATIONAL CHECK
Review the OPERATOR MANUAL. Run the system
according to the SYSTEM OPERATION Section.
Note any abnormal operation.
Check that all lights work according to the "INDICATOR
LIGHT" Section. Correct function of the red "WARNING"
light is important.
If extremely dirty, the jack rods should NOT be wiped. The
jack rods do not need to be oiled or sprayed with anything.
See ML47149 for proper maintenance of all jacks.
Any visible mechanism can be kept clean by washing
with water.
The system will operate better if kept clean and free
from caked on mud or ice.
Review the "JACK RETRACTION" Section. Make sure the
jacks will fully retract to the "STORE" position. Jacks should
not interfere with any of the coach when in the "STORE"
position.
MP44.0035
23SEP11
MAINTENANCE
9
6
-
WINTER WEATHER DRIVING
Anti-icing / deicing agents when splashed on your vehicle,
continue to absorb moisture from the air even after they
have dried. This can facilitate corrosion of metallic
components, such as HWH jacks.
To help reduce the corrosion of jacks after exposure to anti
icing / deicing agents, thoroughly wash jacks with warm
soapy water.
MP44.050
21NOV1
INSTRUCTION SHEET
SENSING UNIT MAINTENANCE/SERVICE
REMOTE MOUNTED "POTTED" ELECTRONIC SENSING UNIT
SENSING UNIT ACCURACY TOLERANCE
The sensing unit has an accuracy tolerance of ± 5.4 inches front to rear and
± 1 inch side to side on a 36 foot vehicle. Typical leveling results will be better.
SENSING UNIT ADJUSTMENT / WITH ADJUSTING ENHANCEMENT
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.
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.
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.
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.
IMPORTANT: THE SENSING UNIT MOUNTING SPRINGS
SHOULD BE COMPRESSED ABOUT 1/2 THEIR FREE
LENGTH. SCREW NUMBER 2 SHOULD NOT BE TURNED
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.
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.
If LED (D) is lit: Tighten adjustment screw number 3
until the LED is off.
LED A - FRONT OF VEHICLE
LED B - LEFT SIDE OF VEHICLE
LED C - REAR OF VEHICLE
LED D - RIGHT SIDE OF VEHICLE
MOUNTING/ADJUSTMENT
SCREWS (3)
LED
B
1
YELLOW LEDs
ADJUSTING
ENHANCEMENT
2
CAP
LED
A
LED
D
LED
C
3
BOTTOM VIEW OF
SENSING UNIT
(3) MOUNTING
SPRINGS
(3) MOUNTING
SCREWS
MOUNTED BELOW
MOUNTING SURFACE
FRONT
THIS
SIDE
UP
MP44.1511
09NOV10
HYDRAULIC LINE CONNECTION DIAGRAM
4 - FIXED JACKS
REMOTE CANOPY LIFT MANIFOLD
FRONT OF TRAILER
RIGHT FRONT
LEFT FRONT
RIGHT REAR
LEFT REAR
LEFT FRONT RIGHT FRONT
JACK JACK
JACK
RETRACT
VALVES (4)
JACK
EXTEND
VALVES (4)
PRESSURE
SWITCH IS
SET AT
2000 PSI
NOTE: PUMP RELIEF
IS SET AT 2500 PSI
RETURN
TO REMOTE
CANOPY LIFT
MANIFOLD
SEE HYDRAULIC LINE CONNECTION DIAGRAM
4 CYLINDER CANOPY LIFT
PRESSURE
LEFT REAR RIGHT REAR
JACKJACK
MP64.3955
23SEP11
HYDRAULIC LINE CONNECTION DIAGRAM
4 CYLINDER CANOPY LIFT
SIDE VIEW OF
MAIN POWER UNIT
CANOPY
LIFT
CYLINDER
CAP END
B
ROD END
A
CANOPY
LIFT
VALVE
CANOPY LIFT
MANIFOLD
FRONT VIEW
PRESSURE
RETURN
ROD END
A
DE
CANOPY
LOWER
VALVE
C
CANOPY
LIFT
CYLINDER
CAP END
B
CANOPY
LIFT
CYLINDER
CAP END
B
ROD END
A
SYNCHRONIZING CYLINDER
ROD END HOSES (A) FROM CANOPY LIFT
CYLINDERS TO SYNCHRONIZING CYLINDER
MUST BE HIGH PRESSURE HOSE OF THE
SAME LENGTH AND DIAMETER
CAP END HOSES (B) MUST BE THE SAME
LENGTH AND DIAMETER
ROD END
CANOPY
A
LIFT
CYLINDER
CAP END
B
MP64.5130
23SEP11
ELECTRICAL CONNECTION DIAGRAM
725 SERIES SINGLE STEP LEVELING SYSTEM
MAIN I/O MODULE HARNESS ROUTING
LF RF
PRESSURE
SWITCH
WARNING
SWITCH
AB B A
6235
1000
PRESSURE
SWITCH
WARNING
SWITCH
2000
6235
1200 2200
TOUCH PANEL
R
HWH COMPUTERIZED LEVELING
EXCESS
SLOPE
AUTO
LEVEL
AUTO
STORE
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
EXTEND
NOT IN
MANUAL
PARK/
BRAKE
RETRACT
TRAVEL
MODE
CANCEL
WARNING!
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
DO NOT CUT
TERMINATING
EXTEND
RETRACT
RESISTOR
SEE ELECTRICAL CONNECTION DIAGRAM
LEVELING SYSTEM HYDRAULIC MANIFOLD
SEE ELECTRICAL CONNECTION
DIAGRAM - SENSING UNIT
SEE ELECTRICAL CONNECTION
DIAGRAM - CANOPY LIFT
P.E.D
B A
TO HWH
GROUND
STUD
6231
RESISTOR
DO NOT CUT
TERMINATING
8601
6810
MAIN HARNESS
CONNECTOR FOR
I/O MODULE
SEE ELECTRICAL CONNECTION DIAGRAM
MULTIPLEXED INPUT/OUTPUT MODULE
PRESSURE SWITCH
LR RR
WARNING
SWITCH
PRESSURE SWITCH
WARNING
SWITCH
8100
B A B A
6235
4000
4200 3200
3000
6235
MP84.3121
23SEP11
ELECTRICAL CONNECTION DIAGRAM
MULTIPLEXED INPUT/OUTPUT MODULE
LED AND WIRE/CONNECTION INFORMATION
A LIT RED LED INDICATES THERE SHOULD BE
+12 VOLTS ON THE CORRESPONDING WIRE.
LINK LIGHT: LINK LIGHT FLASHING
INDICATES PROPER COMMUNICATION
BETWEEN THE I/O MODULE AND THE
TOUCH PANEL. LINK LIGHT ON SOLID
OR OFF INDICATES A FAILURE.
FRONT VIEW
OF I/O
MODULE
87654321
A
B
C
D
CONNECTOR
PIN #
WIRE
COLOR
WIRE
NUMBER
RIGHT FRONT JACK EXTEND
LEFT FRONT JACK EXTEND
RIGHT REAR JACK EXTEND
LEFT REAR JACK EXTEND
LINK LIGHT
LR RR LF RF
PUMP RELAY
MASTER RELAY
LEFT REAR JACK RETRACT
RIGHT REAR JACK RETRACT
LEFT FRONT JACK RETRACT
RIGHT FRONT JACK RETRACT
WIRE DESCRIPTION AND FUNCTION
A1
BLACK 8601 +12 PUMP REQUEST FROM LIFT CONTROL PANEL
CAN HIGH COMMUNICATION WIREYELLOWA2 N/A
NO CONNECTIONA3 AND A4
SWITCHED GROUND FROM RIGHT FRONT JACK WARNING SWITCH2000BLACKA5
SWITCHED GROUND FROM RIGHT FRONT JACK PRESSURE SWITCHBLACKA6 2200
SWITCHED GROUND FROM RIGHT REAR JACK PRESSURE SWITCHBLACKA7 3200
NO CONNECTIONA8
+12 VOLT POWER TO THE TOUCH PANELREDB1 6800
CAN LOW COMMUNICATION WIREGREEN N/AB2
GROUND TO THE TOUCH PANELWHITEB3 6230
NO CONNECTIONB4
SWITCHED GROUND FROM RIGHT REAR JACK WARNING SWITCHBLACKB5 3000
SWITCHED GROUND FROM LEFT REAR JACK PRESSURE SWITCHBLACKB6 4200
NO CONNECTIONB7
SWITCHED GROUND FROM 2000 PSI MANIFOLD PRESSURE SWITCHBLACKB8 8100
+12 VOLT POWER FOR LEVEL SENSING UNITC1 RED 6121
SHIELD WIRE FOR GREEN & YELLOW CAN COMMUNICATION WIRESN/AC2 N/A
GROUND FOR LEVEL SENSING UNITWHITEC3 6231
SWITCHED GROUND FROM SENSING UNIT - REAR0400BLACKC4
SWITCHED GROUND FROM LEFT REAR JACK WARNING SWITCH4000BLACKC5
NO CONNECTIONC6 AND C7
SWITCHED GROUND FROM SENSING UNIT - RIGHT SIDE0300BLACKC8
D1 6810 +12 VOLT POWER FOR I/O MODULE FROM LIFT CONTROL PANEL
BLACK
GROUND FOR JACK WARNING SWITCHESWHITED2 6235
NO CONNECTIOND3
SWITCHED GROUND FROM LEFT FRONT JACK WARNING SWITCH1000BLACKD4
SWITCHED GROUND FROM LEFT FRONT JACK PRESSURE SWITCHBLACKD5 1200
SWITCHED GROUND FROM SENSING UNIT - LEFT SIDE0100BLACKD6
SWITCHED GROUND FROM SENSING UNIT - FRONTBLACKD7 0200
GROUNDBLACKD8 6231
MP84.3172
23SEP11
ELECTRICAL CONNECTION DIAGRAM
LEVELING SYSTEM HYDRAULIC MANIFOLD
1400 - LEFT FRONT JACK EXTEND
1500 - LEFT FRONT JACK RETRACT
2400 - RIGHT FRONT JACK EXTEND
2500 - RIGHT FRONT JACK RETRACT
3400 - RIGHT REAR JACK EXTEND
3500 - RIGHT REAR JACK RETRACT
4400 - LEFT REAR JACK EXTEND
4500 - LEFT REAR JACK RETRACT
8100 - 2000 PSI PRESSURE SWITCH
SEE ELECTRICAL CONNECTION DIAGRAM
725 SERIES SINGLE STEP LEVELING SYSTEM
MAIN I/O MODULE HARNESS ROUTING
EXTEND
VALVES
UNDER
I/O MODULE
8100
AB
P.E.D
AB
P.E.D
AB
P.E.D
AB
P.E.D
LR RR LF RF
2400140034004400
NOTE: MOTOR, RELAY AND SYSTEM
GROUNDS ARE NOT SHOWN. SEE
ELECTRICAL CONNECTION DIAGRAM
MASTER AND PUMP RELAY WIRING
FOR CONNECTION INFORMATION.
LR
RET RET
P.E.D
AB
RR
B A
LF
RET
P.E.D
P.E.D
RF
RET
4500 15003500 2500
P.E.D
ABBA
MP84.3242
23SEP11
ELECTRICAL CONNECTION DIAGRAM
725 SERIES LEVELING SYSTEM
TOUCH PANEL CONNECTIONS
R
HWH COMPUTERIZED LEVELING
EXCESS
SLOPE
AUTO
LEVEL
AUTO
STORE
CANCEL
NOT IN
PARK/
BRAKE
TRAVEL
MODE
EXTEND
MANUAL
RETRACT
EXTEND
RETRACT
WARNING!
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
LINK LIGHT
PIN 4 PIN 1
PIN 1
MASTER WARNING
LIGHT/BUZZER
CONNECTION
PIN #
WIRE
COLOR
WIRE
NUMBER
5 PIN MTA CONNECTOR
1
2
YELLOW
GREEN
3
4
5 RED
WHITE
6230
6800
6 PIN UML CONNECTOR
1
2
3
4
5
BLACK
7699
6
WIRE DESCRIPTION AND FUNCTION
CAN HIGH
CAN LOW
CAN SHIELD
GROUND FROM CONTROL BOX
+12 VOLTS FROM INPUT/OUTPUT MODULE
NO CONNECTION
NO CONNECTION
NO CONNECTION
NO CONNECTION
SWITCHED GROUND FOR MASTER WARNING
NO CONNECTION
MP84.3331
08JUN10
ELECTRICAL CONNECTION DIAGRAM
CANOPY LIFT
CANOPY LIFT CONTROL PANEL
FRONT VIEW
R
W
H
H
CORPORATION
HYDRAULIC ROOM EXTENSION
OFF
ON
UNDERSTAND OPERATOR’S MANUAL BEFORE
CAUTION!
USING. KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF ROOM WHEN OPERATING.
EXTEND
RETRACT
UML CONNECTORS
PIN 1
PIN 2
PIN 3
PIN 4
PIN 5
PIN 6
8601
5000
5100
6810
NO CONNECTION
6125
SW. +12 PUMP REQUEST
SW. +12 CANOPY LIFT
SW. +12 CANOPY LOWER
SW. +12 TO I/O MODULE
+12 BATTERY FROM MASTER RELAY
SEE ELECTRICAL CONNECTION DIAGRAM
MAIN I/O MODULE HARNESS ROUTING
B A
5000
8601
6800
CANOPY LIFT CONTROL PANEL
6810
PIN 1
5100
PIN 3
PIN 3 PIN 6
REAR VIEW
6
5
12 3
4
8601
PIN 4
6125
PIN 6
PIN 4PIN 1
SEE ELECTRICAL CONNECTION DIAGRAM
MASTER AND PUMP RELAYS
1 FC
RET
5100
AB
P.E.D
LIFT
RETRACT
FUSE
15 AMP
TO GROUND
STUD ON PUMP
LIFT
EXTEND
6125
EXT
1 FC
AB
P.E.D
5000
LIFT MANIFOLD
TOP VIEW
MP84.3385
26SEP11
ELECTRICAL CONNECTION DIAGRAM
MASTER AND PUMP RELAYS
I/O MODULE
SOLENOID VALVE WIRING NOT SHOWN
6230 (WHITE)
6230 (WHITE)
TO GROUND
STUD ON SIDE
OF PUMP
8500
(BLACK)
RELAY
MASTER
CONTROL
6800
FUSE
40 AMP
6230
(WHITE)
GROUND
MASTER
RELAY
6230
(WHITE)
PUMP
RELAY
GROUND
8600
(BLACK)
CONTROL
RELAY
PUMP
SEE ELECTRICAL
CONNECTION
DIAGRAM - MAIN
I/O MODULE
HARNESS
ROUTING
PUMP RELAY
TO +12 BATTERY
MASTER RELAY
PUMP
MOTOR
6125
FUSE
15 AMP
SEE ELECTRICAL
CONNECTION DIAGRAM
CANOPY LIFT
MP84.3400
23SEP11
0
5
ELECTRICAL CONNECTION DIAGRAM
LEVEL SENSING UNIT
6
5
4
SEE WIRE
LEGEND
BELOW
SEE WIRE
LEGEND
BELOW
3
6
2
5
1
4
3
2
1
SEE ELECTRICAL CONNECTION
DIAGRAM - 725 SERIES
SINGLE STEP
LEVELING SYSTEM
A
D
B
YELLOW LEDS
C
BOTTOM VIEW OF
SENSING UNIT
LED A - FRONT OF VEHICLE
LED B - LEFT SIDE OF VEHICLE (DRIVER SIDE)
LED C - REAR OF VEHICLE
LED D - RIGHT SIDE OF VEHICLE (PASSENGER SIDE)
WIRE LEGEND -
SENSING
UNIT
PLUG
HARNESS
PLUG
PIN 1 - ORANGE - BLACK - 0400 - SWITCHED GROUND WHEN REAR IS LOW
PIN 2 - WHITE - - - WHITE - 6231 - GROUND FROM SENSING UNIT
PIN 3 - RED - - - - - RED - 6121 - +12 VOLT FOR SENSING UNIT
PIN 4 - YELLOW - BLACK - 0100 - SWITCHED GROUND WHEN LEFT SIDE IS LOW
PIN 5 - BLACK - - - BLACK - 0200 - SWITCHED GROUND WHEN FRONT IS LOW
PIN 6 - GREEN - - BLACK - 0300 - SWITCHED GROUND WHEN RIGHT SIDE IS LOW
MOUNTING / ADJUSTMENT
SCREWS (3)
SEE
ELECTRICAL
CONNECTION
DIAGRAM
MULTIPLEXED
INPUT/
OUTPUT
MODULE
MP84.343
12OCT1
INFORMATION INSERT
HYDRAULIC SOLENOID VALVE
INDENTIFICATION - MANUAL OPERATIONS - REPLACEMENT
REPLACEMENT VALVES MAY HAVE A VALVE RELEASE NUT OR RELEASE CAM
SOLENOID VALVES WITH CAM RELEASE
The cam release style valves are direct
replacements for all previous styles of
HWH hydraulic solenoid valves.
Valve size and voltage are still factors to be
considered when replacing any HWH hydraulic
solenoid valve. Replace a small style 12 volt
valve with a small style 12 volt valve. Replace
a large style 12 volt valve with a large style
12 volt valve. This is true for 24 volt valves
also.
Valve installation has not changed, simply
turn out the old valve, confirm that no o-ring
debris has been left in the manifold block
and turn in the new valve.
After installing the valve and without creating
stress on the wires at the point where they
exit the valve body. Use a wire tie to secure
the wires to the valve body to keep the wires
from being pinched beneath the cam
mechanism during operation.
CAM RELEASE
VALVE CLOSED
Default position
CAM RELEASE
VALVE OPEN
Manual retract
position
CAM RELEASE
VALVE CLOSED
Default position
CAM RELEASE
VALVE OPEN
Manual retract
position
1 1/2" DIAMETER SOLENOID VALVE
NOTE: The cam release may be
rotated in any direction on the
valve. DO NOT assume that
pushing down will open the
valve. Pushing the cam in the
wrong direction could damage
the valve.
WIRE TIE
2 1/4" DIAMETER SOLENOID VALVE
NOTE: The cam release may be
rotated in any direction on the
valve. DO NOT assume that
pushing down will open the
valve. Pushing the cam in the
wrong direction could damage
the valve.
WIRE TIE
SOLENOID VALVES WITH 1/4" NUT RELEASE
VALVE RELEASE
NUT
VALVE RELEASE
NUT
PLASTIC PLUG:
REMOVE TO GAIN
ACCESS TO THE 1/4"
VALVE RELEASE NUT
1 1/2" DIAMETER SOLENOID VALVE
NOTE: When opening the
valve DO NOT turn the valve
release nut more than 4 and
1/2 turns counter clockwise.
Damage to the valve may
result.
2 1/4" DIAMETER SOLENOID VALVE
NOTE: When opening the valve
DO NOT turn the valve release
nut more than 2 full turns
counter clockwise. Damage to
the valve may result.
THE BREATHER CAP IS
LOCATED ON THE TOP
SIDE OF THE POWER
UNIT RESERVOIR
FILL BETWEEN
OIL LEVEL
GROOVES
1/4" NUT DRIVER
IMPORTANT: PRIOR TO REMOVING THE BREATHER
CAP, EITHER TO CHECK THE OIL LEVEL OR TO USE
1/4" NUT DRIVER, CLEAN ANY DEBRIS FROM THE
TOP OF THE RESERVOIR. BEFORE RETURNING THE
BREATHER CAP TO THE RESERVOIR, REMOVE ANY
PAINT CHIPS OR OTHER DEBRIS FROM THE DIPSTICK
INCLUDING DEBRIS INSIDE THE 1/4" NUT DRIVER.
MP84.9999
28FEB11
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