HWH 725 SERIES User manual

OPERATOR’S MANUAL
ML46430/MP04.3370
08JUN10
Touch Panel Leveling Control
BI-AXIS Hydraulic Leveling
FEATURING:
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
725 SERIES LEVELING SYSTEM
HWH COMPUTER-CONTROLLED
R
Straight-Acting Jacks
AP46429
R
RETRACT
EXTEND
HWH COMPUTERIZED LEVELING
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
CANCEL
STORE
AUTO
AUTO
LEVEL
TRAVEL
BRAKE
MODE
WARNING!
EXCESS
SLOPE
NOT IN
PARK/
R
MANUAL
RETRACT
EXTEND
CORPORATION
W
HH
R

OPERATING MANUAL
MP14.0004
17APR12
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, ROOM EXTENSIONS AND OTHER
MOVABLE MECHANISMS ARE BEING OPERATED.
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 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.

MP24.3150
17FEB11
CONTROL IDENTIFICATION
725 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"
AUTO LEVEL/STORE
"CANCEL" Button
"NOT IN PARK"
Indicator light
Indicator light
"TRAVEL MODE"
Indicator light
Indicator light
AUTO LEVEL
"AUTO STORE"
Button
STORE
Button
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
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 (4) red
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
It will be on when any one or more jacks are extended
This is a jacks down warning. It will sound if the
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:
master "JACKS DOWN" warning light is on.
and the ignition is "ON".
there are no red WARNING lights on.
BUZZER:
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.
level.

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
MP34.0229
06AUG13
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, it is
recommended to 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.
EXTENDED CAN CAUSE SEVERE DAMAGE TO THE
MOVING THE VEHICLE WITH THE LEVELING JACKS
VEHICLE IS EQUIPPED WITH STRAIGHT-ACTING JACKS.
THE GROUND OR IN THE EXTEND POSITION. THIS
THE LEVELING JACKS ARE STILL IN CONTACT WITH
DO NOT MOVE THE VEHICLE WHILEWARNING:
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 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.
JACKS AND OR THE VEHICLE AND CREATE A DRIVING
HAZARD. DO NOT RELY SOLELY UPON WARNING
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
LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY TO
CHECK THAT ALL JACKS ARE FULLY RETRACTED
INTO THE STORE/TRAVEL POSITION.
IMPORTANT: 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.

MP34.275
2
08SEP1
4
OPERATING PROCEDURES
725 SERIES LEVELING SYSTEM
AUTOMATIC HYDRAULIC LEVELING
the vehicle ignition is in the ON or ACC. position
the leveling system touch panel can be on anytime
NOTE: One or two yellow level indicator lights on
the automatic leveling function.
"CANCEL" button on the HWH touch panel will stop
pushing the "AUTO LEVEL", "AUTO STORE" or the
IMPORTANT: During the Automatic Leveling procedures,
The AUTO LEVEL light will start to flash.
3. Press the "AUTO LEVEL" button one time.
and place a pad under each jack if the ground will not
2. At this time, the operator may want to check the jacks
engine off. Turn the ignition to the "ACCESSORY" position.
parking the vehicle and set parking brake. Turn the coach
1. Place transmission in the recommended position for
and the park brake is set.
support the vehicle.
5. Turn the ignition switch to the "OFF" position.
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 indicato
r
light to "bump" the vehicle up slightly to turn that yellow
indicator light off.
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.
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 necessar
y.
If the switch is on (or when it comes on) the system will chec
k
the left rear jack pressure switch, extending the jack if necessa
ry
If the left rear switch is on (or when it comes on), the system
will recheck the right rear (extending if necessary) then reche
ck
the left rear (extending if necessary). After checking and
rechecking both rear jacks, the system then checks the fron
t
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.
In the event the jacks are
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 no
t
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 vehicle to a more level position or level the vehicle
as close as possible according to the MANUAL LEVELING
section. Manual leveling will operate when the EXCESS
stabilize the vehicle if the "EXCESS SLOPE" light comes on
.
EXCESS SLOPE SITUATION:
SLOPE light is on.
Stabilize sequence information: The stabilize sequence
is part of the auto level sequence. 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.

MP34.3062
08JUN10
WARNING:
JACK RETRACTION (HWH TOUCH PANEL CONTROLS)
THE OPERATOR MUST BE SURE THAT
THERE ARE NO OBJECTS UNDER THE VEHICLE AND THAT
ALL PEOPLE ARE CLEAR OF THE VEHICLE.
3. If jacks cannot be retracted by the above procedure see
MANUAL JACK RETRACTION Section.
WARNING: DO NOT MOVE THE VEHICLE WHILE THE
LEVELING JACKS ARE STILL IN CONTACT WITH THE GROUND
OR IN THE EXTEND POSITION. THIS VEHICLE IS EQUIPPED
WITH STRAIGHT-ACTING JACKS. MOVING THE VEHICLE
WITH THE LEVELING JACKS EXTENDED CAN CAUSE
SEVERE DAMAGE TO THE JACKS AND OR THE VEHICLE AND
CREATE A DRIVING HAZARD. DO NOT RELY SOLELY UPON
WARNING LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY TO
CHECK THAT ALL JACKS ARE FULLY RETRACTED INTO
2. The vehicle can be moved as soon as the red warning
lights are out, the jacks are in the STORE/TRAVEL position
and the green "TRAVEL" light is on.
THE STORE/TRAVEL POSITION.
OPERATING PROCEDURES
725 SERIES LEVELING SYSTEM
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 a red warning light and buzzer come on
while traveling, the jacks should be checked as soon as
a safe parking location is found.
NOTE: When the jacks are stored with the ignition in
the ON position, the warning buzzer will sound until
the jacks have retracted to the STORE position. If
desired, the jacks can be stored with the ignition key
in the accessory position. This will eliminate the
warning buzzer while the jacks are retracting.
1. 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.
the automatic store function.
"CANCEL" button on the HWH touch panel will stop
pushing the "AUTO LEVEL", "AUTO STORE" or the
IMPORTANT: During the Automatic Store procedures,
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.

OPERATING PROCEDURES
MP34.3334
08JUN10
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, end or corner of the
Jacks will extend (or retract) in pairs to raise (or lower) a side
or end of the vehicle.
button for more than ten (10) seconds after that pair of
4. When leveling is completed, turn the ignition
switch to the "OFF" position.
the vehicle, and set the parking brake. Turn the ignition to the
"ACCESSORY" position.
jacks are fully extended.
vehicle is low. It is best to level the vehicle side to side first,
if needed, before front to rear.
Any jack not used for leveling can be extended to the
ground. This provides additional stability against wind and
activity in the vehicle. Jacks used to stabilize the vehicle
after leveling is complete should lift the vehicle slightly after
touching the ground.
MANUAL JACK RETRACTION
large and / or small valves.
direction may damage the valve.
on the valve. Pushing the release cam in the wrong
release cam. The cam might be rotated in any direction
Large and small valves may be equipped with a valve
than 2 full turns may damage the valve.
release nut turned approximately 2 full turns. More
Large valves with valve release nuts will need the
the two center valves.
3. Retract the front jacks by slowly opening
WARNING:
2. Allow clearance for the vehicle to lower.
The solenoid valves are located on the power unit/valve
1. Locate the manual valve release on each solenoid valve.
RELEASE IS OPERATED.
OR BACKWARD WITHOUT WARNING AS THE VALVE
THE VEHICLE MAY DROP AND/OR MOVE FORWARD
DISTANCE IN FRONT AND REAR OF THE VEHICLE.
DO NOT CRAWL UNDER THE VEHICLE, KEEP A SAFE
could damage the valves.
valves more than 4 and 1/2 turns. Turning the nuts more
the jacks. DO NOT turn valve release nuts on the small
IMPORTANT: Only open the valves enough to retract
assembly.
KEEP AWAY FROM THE WHEELS,
control panel will not retract the jacks for travel.
The solenoid valves on the power unit valve assembly are
equipped with a manual valve release. Use the manual valve
release for retracting only if the "AUTO STORE" button on the
NOTE: Assemblies can have different combinations of 5. Check that all four jacks are now retracted.
VALVE RELEASE CAM OPERATION
LARGE STYLE WITH
VALVE RELEASE CAM
VALVE RELEASE NUT
SMALL STYLE WITH
clockwise, or move the valve release cam to the closed
7. The system should now be repaired before using again.
IMPORTANT: Once the valve release nut is snug, DO
NOT tighten the valve release nut past this point as
6. Close the valves by turning the manual valve releases
internal damage may occur to the solenoid.
VALVE RELEASE NUT
LARGE STYLE WITH
MANIFOLD
OPEN
VALVE
CLOSED
position.
CLOSE
WITH VALVE
RELEASE CAM
PLASTIC PLUG
BREATHER
CAP
SMALL STYLE
OPENED
VALVE
4. Repeat the process for the rear jacks by opening the two
Cap. See the back page of this manual for further info.
A 1/4" Nut Driver has been incorporated into the Breather
outer valves.

MAINTENANCE
MP44.0018
10APR12
OIL LEVEL
The oil level should be checked when the vehicle is first
purchased and then once every two years. More often if
there is an oil leak in the system.
NOTE: Overfilling the tank can cause leakage of oil
through the breather cap.
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
All electrical connections, especially ground connections,
should be clean, tight, free from corrosion and protected
JACKS
There are very few user serviceable parts on the jacks
The jacks require very little maintenance. If the jacks are
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.
The system will operate better if kept clean and free
from caked on mud or ice.
OPERATIONAL CHECK
Check that all lights work according to the "INDICATOR
LIGHT" Section. Correct function of the red "WARNING"
Review the OPERATOR MANUAL. Run the system
according to the SYSTEM OPERATION Section.
Note any abnormal operation.
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"
All maintenance should be done as part of the normal
servicing of the coach.
clean. from weathering.
light is important.
position.
FLUID: HWH Specialty Hydraulic Oil is recommended. In an
brake fluid or hydraulic jack fluid. Use of these can damage
and can cause staining should a leak occur. DO NOT USE
Dexron automatic transmission fluid contains red dye
emergency Dexron automatic transmission fluid can be used.
seals.
NOTE:
extremely dirty with caked on mud they should be washed.
If extremely dirty, the jack rods should NOT be wiped. The
jack rods do not need to be oiled or sprayed with anything.
ROOM EXTENSIONS
The HWH room mechanisms need no maintenance.
DO NOT grease or lubricate any parts of the HWH
mechanism.
Any visible mechanism can be kept clean by washing
with water. Refer to the vehicle manufacturer for
correct maintenance of the room seals.
All jacks and any HWH room extensions or steps 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.
See ML47149 for proper maintenance of all jacks.

MAINTENANCE
NOT IN PARK/BRAKE CHECK
Apply the brake so the coach cannot roll. Turn the ignition
to the "ACC" or "ON" position. Release the parking brake.
THE COACH WHEELS SECURELY SO THE COACH
CANNOT ROLL FORWARD OR BACKWARD.
WARNING: WHEN MAKING THIS CHECK, BLOCK If any of the above checks or inspections reveal a problem
or if there are other problems or questions, consult a
qualified RV repair center, your vehicle or coach
manufacturer, or HWH CORPORATION
22NOV1
6
MP44.050
2
Push the "AUTO LEVEL" button. The "NOT IN PARK/
BRAKE" indicator light should come on while the "AUTO
LEVEL" button is pushed. Release the "AUTO LEVEL"
for service or repair.
button and set the park brake. The leveling system
should now function.
WINTER WEATHER DRIVING
have dried. This can facilitate corrosion of metallic
continue to absorb moisture from the air even after they
Anti-icing / deicing agents when splashed on your vehicle,
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.

SENSING UNIT MAINTENANCE/SERVICE
SENSING UNIT ADJUSTMENT / WITHOUT 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
23OCT1
5
MP44.151
0
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. Tighten or loosen the adjustment screws according IMPORTANT: WHEN ALL 4 LED’S ARE OFF, MOVE THE
VEHICLE TO AN UNLEVEL POSITION SO ONE OR TWO
YELLOW LIGHTS ARE ON. LEVEL THE VEHICLE
ACCORDING TO THE YELLOW LEVEL LIGHTS.
RECHECK THE LEVEL. IF MORE ADJUSTMENT IS
NEEDED, DO NOT TRY TO ADJUST THE SENSING UNIT
UNTIL THE YELLOW LEVEL LIGHTS GO OUT, INSTEAD
Example: After the initial adjustment and releveling
the vehicle, the front is still low. This means the front
yellow level light is turning off too soon. LED A is for
the front of the vehicle. Move the adjustment for that
light very, very, slightly in the OPPOSITE direction that
is given in the above instructions for LED’s A, B, C
and D. This will allow the front yellow light to stay
on slightly longer to bring the front up more. Again,
unlevel the vehicle then relevel the vehicle using
the yellow level lights on the touch panel. Recheck
with a level. Repeat the "tweaking" process until the
system levels the vehicle properly.
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.
to these instructions to adjust the sensing unit.
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
JUST "TWEAK" THE SENSING UNIT, IGNORING THE
LED’S ON THE SENSING UNIT.
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.
SENSING UNIT
BOTTOM VIEW OF
3
LED
C
LED
D
A
LED
2
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)
YELLOW LEDs
1
LED
B
NOTE: OBSOLETE SENSING UNIT USED PRIOR
TO 2010.

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

NOTE: BEFORE OPERATING MANUAL
VALVE RELEASE, READ AND UNDERSTAND
PROCEDURE FOR MANUAL JACK RETRACTION
IN OPERATOR’S INSTRUCTIONS. VALVES MAY
HYDRAULIC LINE CONNECTION DIAGRAM
MP64.3917
01NOV11
(WITH 4 STRAIGHT-ACTING JACKS)
PUMP/MANIFOLD
ASSEMBLY
SHUTTLE
VALVE
LEFT
FRONT RIGHT FRONT
RIGHT
REAR
LEFT
REAR
625/725 SERIES LEVELING SYSTEM
BREATHER
CAP
VELOCITY VALVE
NOTE: SOME
MANIFOLDS
ARE EQUIPPED
WITH VELOCITY
VALVES
LF RF
3000PSI
PRESSURE
SWITCH
50PSI
PRESSURE
SWITCH
RRLR
MANIFOLDS MAY HAVE FOUR (4) LARGE
VALVES OR FOUR (4) SMALL VALVES
BE EQUIPPED WITH VALVE RELEASE NUTS OR
RELEASE CAMS.
LARGE AND
SMALL VALVES
WITH RELEASE
NUTS
LARGE AND
SMALL VALVES
WITH RELEASE
CAMS
PRESSURE
3000 PSI
ALTERNATE
SWITCH
LOCATION
NOTE: Load center is
not shown, load center
may need to be removed
to be removed to access
shuttle valve and shuttle
valve tube. PRESSURE
CHECK
HERE VALVES (4)
CHECK
OUTER

HYDRAULIC
POWER UNIT
M
RELIEF VALVE
RETURN PRESSURE
SOLENOID MANIFOLD
ASSEMBLY
CHECK
VALVE
INNER
CHECK
VALVE
OUTER
SOL.VALVE
LR SOL.VALVE SOL.VALVE
RFLF
PRESSURE/RETURN
SHUTTLE VALVE
50 PSI
SWITCH
*JACK
PRESSURE
SWITCH
JACK
CYLINDER
LEFT REAR RIGHT REAR
RIGHT
FRONT
LEFT
FRONT
MP64.453
0
29MAR1
0
*3000 PSI
SWITCH
LEVELING SYSTEM
ROOM EXTENSION
MANIFOLD LOCATED HERE
WHEN APPLICABLE
RR
SOL.VALVE
* USED ON AUTOMATIC SYSTEMS ONLY
NOTE: 50 PSI PRESSURE SWITCH
MAY NOT BE USED ON ALL 625 MANIFOLDS
.
3500 P.S.I.
BI-AXIS LEVELING WITH STRAIGHT-ACTING JACKS
625, 625S OR 725 SERIES
HYDRAULIC SCHEMATIC DIAGRAM
800 PSI TO SHIFT

MP84.3111
17JUN11
TOUCH PANEL
LF RF
LR RR
AB B A
B A B A
6235
4000
4200 3200
6235
3000
6235
1000
1200 2200
6235
2000
WARNING
SWITCH
PRESSURE SWITCH
SWITCH
WARNING
PRESSURE SWITCH
SWITCH
WARNING
SWITCH
PRESSURE
SWITCH
WARNING
PRESSURE
SWITCH
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
HWH COMPUTERIZED LEVELING
EXTEND
RETRACT
AUTO
STORE
LEVEL
AUTO
WARNING!
BRAKE
TRAVEL
CANCEL MODE
PARK/
NOT IN
EXCESS
R
SLOPE
MANUAL
RETRACT
EXTEND
SEE ELECTRICAL CONNECTION DIAGRAM
LEVELING SYSTEM HYDRAULIC MANIFOLD
PUMP AND MASTER RELAYS
SEE ELECTRICAL CONNECTION
DIAGRAM - SENSING UNIT
DO NOT CUT
TERMINATING
RESISTOR
DO NOT CUT
TERMINATING
RESISTOR
MULTIPLEXED INPUT/OUTPUT MODULE
SEE ELECTRICAL CONNECTION DIAGRAM
8100
8101
FUSE
15 AMP
PARK BRAKE
SWITCH
DIODE PARK BRAKE
LIGHT
9001 - TO
9000
NOTE: DIODE ARRANGEMENT MAY NOT BE
PRESENT ON ALL INSTALLATIONS
TO +12V ACC.
SEE ELECTRICAL CONNECTION DIAGRAM
MASTER WARNING LIGHT AND BUZZER
JACK WARNING SWITCHES, PRESSURE SWITCHES & PARK BRAKE
ELECTRICAL CONNECTION DIAGRAM
725 SERIES SINGLE STEP LEVELING SYSTEM

MP84.3170
ELECTRICAL CONNECTION DIAGRAM
MULTIPLEXED INPUT/OUTPUT MODULE
01NOV11
PIN # WIRE
COLOR WIRE NUMBER WIRE DESCRIPTION AND FUNCTION
A1 - (+12 BLACK WIRE 8601) INPUT WHEN EXTENSION DEVICES ROOMS, GEN SLIDE, STEP COVER ECT. ARE USED
LED AND WIRE/CONNECTION INFORMATION
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 SWITCHED GROUND FROM 50 PSI MANIFOLD PRESSURE SWITCH8101BLACKA8 +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 3000 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 RED 6120 +12 VOLT ACCESSORY POWER FOR I/O MODULE
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 GROUND FROM PARK BRAKE SWITCHBLACKD8 9000
RIGHT REAR JACK
RIGHT FRONT JACK
LEFT FRONT JACK
LEFT REAR JACK
LINK LIGHT
DUMP
TRAVEL
MASTER RELAY
PUMP RELAY
FRONT VIEW
OF I/O
MODULE
CONNECTOR
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.
87654321
A
B
C
D
NOTE: DUMP AND TRAVEL LEDS PRESENT
BUT NOT ALWAYS USED
GROUND STUD

MP84.3231
ELECTRICAL CONNECTION DIAGRAM
725 LEVELING SYSTEM HYDRAULIC LEVELING MANIFOLD
18FEB11
PUMP AND MASTER RELAYS
POWER UNIT
TOP VIEW
PUMP
RELAY (A)
RELAY (B)
PUMP
P.E.D
ABAB
P.E.D
BA
P.E.D
AB
P.E.D
RR
RF
LF
LR
3000 LB
PRESSURE
MOTOR
MASTER
SHOWN HERE BENEATH THE
GROUND STUD IN MANIFOLD
PUMP
MOTOR
PUMP
RELAY (B)
+
MASTER
RELAY (A)
40 AMP
FUSE
SWITCH 8100 SEE DETAIL (A)
MULTIPLEX I/O MODULE
50 LB
PRESSURE
SWITCH
8101
8500
6230
GROUND
RELAY
6800
DEUTSCH CONNECTOR
TO +12 VOLT
BATTERY 8600
6230
TO GROUND STUD
ON PUMP (6230)
POWER UNIT
SIDE VIEW
GROUND STUD
(RELAY GROUND)
I/O MODULE
SEE DETAIL (A)
MULTIPLEX
SYSTEM
SINGLE STEP LEVELING
DIAGRAM - 725 SERIES
SEE ELECTRICAL CONNECTION
LR
AB
RRLF RF
BA ABBA
6230
6230
4400
6230
2400
1400
6230
3400
DETAIL (A)
NOTE: PILOT AIR DUMP
CONNECTION NOT USED

ELECTRICAL CONNECTION DIAGRAM
08JUN10
725 SERIES LEVELING SYSTEM
TOUCH PANEL CONNECTIONS
LINK LIGHT
PIN 1
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
HWH COMPUTERIZED LEVELING
EXTEND
RETRACT
AUTO
STORE
LEVEL
AUTO
WARNING!
BRAKE
TRAVEL
CANCEL MODE
PARK/
NOT IN
EXCESS
R
SLOPE
MANUAL
RETRACT
EXTEND
YELLOW
GREEN
WIRE
COLOR
WHITE
5 PIN MTA CONNECTOR
3
4
5 RED
PIN #
2
1
6800
6230
NUMBER
WIRE
+12 VOLTS FROM INPUT/OUTPUT MODULE
CAN SHIELD
GROUND FROM CONTROL BOX
WIRE DESCRIPTION AND FUNCTION
CAN LOW
CAN HIGH
MP84.3331
PIN 4 PIN 1
2
6
4
3
5
6 PIN UML CONNECTOR
1
SWITCHED GROUND FOR MASTER WARNING
BLACK 7699
NO CONNECTION
NO CONNECTION
NO CONNECTION
NO CONNECTION
NO CONNECTION
MASTER WARNING
LIGHT/BUZZER
CONNECTION

MP84.343
0
12OCT1
5
LEVEL SENSING UNIT
ELECTRICAL CONNECTION DIAGRAM
1
2
3
6
5
4
SEE WIRE
LEGEND
BELOW
SEE
ELECTRICAL
CONNECTION
DIAGRAM
MULTIPLEXED
INPUT/
OUTPUT
MODULE
SEE ELECTRICAL CONNECTION
DIAGRAM - 725 SERIES
SINGLE STEP
LEVELING SYSTEM
MOUNTING / ADJUSTMENT
SCREWS (3)
A
B
D
CYELLOW LEDS
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 -
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
SEE WIRE
LEGEND
BELOW
14
5
6
3
2
SENSING
UNIT
PLUG HARNESS PLUG

CONNECT THIS END TO
+12 VOLT IGNITION "ON" POWER
5-15 AMP FUSE
+
_
BUZZER
SEE TOUCH PANEL
CONNECTION
INFORMATION
MASTER LIGHT/BUZZER CONNECTION DIAGRAM
725 SERIES LEVELING SYSTEM
MP84.9964
03OCT11
A MASTER WARNING INDICATOR SHOULD ALWAYS BE USED. WHEN THE LEVELING SYSTEM HAS
STRAIGHT-ACTING JACKS A WARNING BUZZER MUST BE USED.
NOTE: BY SUPPLYING IGNITION POWER TO THE WARNING BUZZER AND LIGHT, AND "ACC" POWER TO THE
TOUCH PANEL, THE SYSTEM MAY BE OPERATED IN ACCESSORY WITHOUT THE BUZZER SOUNDING. THE
NEGATIVE SIGNAL FOR THE WARNING INDICATORS MUST ALWAYS COME FROM THE TOUCH PANEL.
PIGTAIL W/DIODE
AND IN-LINE
FUSE HOLDER - 6121
PIGTAIL PROVIDED - 7699
IGNITION
6111
7699 6111 7699 7699
WARN LIGHT
CONTROL CONTROL
BUZZER
LED DO NOT
POLARITY
REVERSE
MASTER
WARNING
LIGHT