HWH 625 Series User manual

OPERATOR’S MANUAL
ML30288/MP05.6004
09JUN05
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
R
Kick-Down Jacks
HWH COMPUTERIZED LEVELING
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
CAUTION!
SLOPE
AUTO
STORE
OFF
TRAVEL
NOT IN
PARK/
BRAKE
ON EXCESS
MODE
HWH COMPUTER-CONTROLLED
625 SERIES LEVELING SYSTEM
R
AP34633 - Europe
AP28847 - U.S.
CORPORATION
W
HH
R

OPERATOR’S MANUAL
MP15.0
30MAY01
CAUTION !
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 THE VEHICLE WHILE LEVELING SYSTEM AND ROOM EXTENSIONS ARE
BEING OPERATED.
KICK-DOWN JACKS MAY ABRUPTLY SWING UP WHEN THE FOOT OF THE JACK CLEARS THE GROUND
OR WHEN THE JACK REACHES FULL EXTENSION.
NEVER PLACE HANDS OR OTHER PARTS OF THE BODY NEAR HYDRAULIC LEAKS. OIL MAY PENETRATE
THE 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.
IF THE VEHICLE IS EQUIPPED WITH KICK-DOWN STYLE JACKS, DO NOT OVER EXTEND THE REAR JACKS.
IF THE WEIGHT OF THE VEHICLE IS REMOVED FROM ONE OR BOTH REAR WHEELS, THE VEHICLE MAY
ROLL FORWARD OR BACKWARD OFF OF THE JACKS.
NOTE: KEEP THE CONTROL VALVE LEVERS IN THE STORE POSITION WHEN JACKS ARE NOT IN USE.
IMPORTANT: IF VEHICLE 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.

CONTROL IDENTIFICATION
MP25.5010
10SEP03
ON
HWH COMPUTERIZED LEVELING
EXCESS
SLOPE
NOT IN
PARK
STORE
"EXCESS SLOPE"
LIGHT
"NOT IN PARK" LIGHT
HYDRAULIC OPERATION
LIGHT
"I" ON BUTTON
"STORE" BUTTON
"OFF" BUTTON
"TRAVEL MODE" LIGHT
LOW BATTERY
LIGHT FRONT RETRACT BUTTON
FRONT EXTEND BUTTON
WARNING LIGHTS
(4- Red)
RIGHT SIDE EXTEND BUTTON
RIGHT SIDE RETRACT BUTTON
LEVELING LIGHTS
(4- Yellow)
REAR EXTEND BUTTON
REAR RETRACT BUTTON
STORE LIGHT
LEFT SIDE EXTEND
BUTTON LEFT SIDE RETRACT BUTTON
operation.
button. The on indicator light is above the "I" button.
the jacks.
leveling system cannot level the vehicle.
CONTROL FUNCTIONS
CONTROLS
lLEVEL
"OFF" BUTTON:
"I" BUTTON:
"STORE" BUTTON:
UP AND DOWN ARROWS:
"EXCESS SLOPE" LIGHT:
"NOT IN PARK/BRAKE" LIGHT:
"TRAVEL MODE" LIGHT:
LOW BATTERY LIGHT:
MASTER "JACKS DOWN" WARNING LIGHT:
side, left side, front and rear. Pushing UP arrows will cause
"STORE" button. This button is used to automatically retract
controlling jacks. They will operate the jacks in pairs, right
WARNING LIGHTS:
This is the on button and automatic operation
The store indicator light is above the
These buttons are for manually
the jacks to extend and raise the vehicle. DOWN arrows will
cause the jacks to retract.
This indicator will light when
the panel is on and the hand/auto brake is not set.
INDICATOR LIGHTS
LEVELING LIGHTS:
This indicator light will be on
when the ignition is on, when the jacks are retracted and
there are no red WARNING lights on.
sensing indicators. When a yellow light is on, it indicates that
its side or end of the vehicle is low. No more than two lights
STORE LIGHT:
should be on at the same time.
The four red lights surround the yellow
level indicators are jack WARNING lights. They are functional
only when the ignition is in the "ON" or "ACC" position, the
system is on, and the jacks are in the vertical position.
This indicator will light when the
The four yellow indicating lights are level
This is a light
mounted in the dash separate from the touch panel. It will be
on when any one or more jacks are vertical and the ignition is "ON".
This indicator will be on when the
controller senses low voltage.
This light will flash when the system is in the
STORE mode.
Push the "OFF" button to stop hydraulic
MODE
CAUTION!
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
OFF
TRAVEL

MP25.999
5
18MAR2
1
CONTROL IDENTIFICATION
PUMP RUN TIME
SYSTEM VARIATIONS FOR PUMP RUN TIME
Contact HWH corporation to get specific information about the system in this vehicle.
No matter what HWH system is on the vehicle, the pump should not be ran for more than three minutes
(3" motors) or six minutes (3.7" or 4.5" motors) without allowing the pump motor to cool for thirty minutes.
Continuous operation of the pump motor without allowing the motor to cool can damage the pump motor.
Some HWH systems are equipped with a lighted reset switch.
If the processor turns the pump off because the run time has
been exceeded, the light in the reset switch will turn on. The
With some systems, when the processor has turned the pump off because the run time has been exceeded, power
to the HWH system must be turned off and back on before the system will operate. With motorized vehicles, turn the
ignition off and back on. With non-motorized vehicles, turn the master power switch for the HWH system off and back
DO NOT continue without allowing the pump motor to cool for thirty minutes.
When operating some leveling systems manually or operating the room extensions, the pump will turn off and back
on while pushing the control button when the pump run time has been exceeded.
the pump motor to cool for thirty minutes.
Some systems can be turned back on immediately after the processor turns the pump off.
back on or run the pump without allowing the pump motor to cool for thirty minutes.
Some systems with rooms run the rooms separate from the system processor. These systems do not monitor pump
run time when operating the rooms.
pump motor to cool for thirty minutes.
The HWH systems with a computer processor monitor the pump run time and will turn the pump off if the run time exceeds a
specified time. This time can vary with different systems. Due to available electronics or system design, the pump run time
programs will also vary. Leveling systems and room extensions that are not controlled by a system processor have no pump
run time protection.
thirty minutes.
Pump motors used with HWH leveling systems and room extension systems come in 3 different diameters; 3", 3.7" and 4.5".
Contact the vehicle manufacturer or HWH for help with identifying the motor size.
runs for more than three minutes with a 3" motor; or six minutes with a 3.7" or 4.5" motor that the motor is allowed
to cool for thirty minutes before continuing. Continuous operation of the pump motor without allowing the motor
PUMP RUN TIME
It is important that any time the pump
to cool can damage the motor.
DO NOT run the pump more than three or six minutes without allowing the pump motor to cool for
DO NOT run the pump more than three or six minutes without allowing the
DO NOT turn the system
DO NOT continue without allowin
g
on.
system will not operate until the reset switch is pushed.
DO NOT continue without allowing the pump motor to
cool for thirty minutes. LIGHTED RESET SWITCH
For cold weather information see "COLD WEATHER OPERATIONS" below.
COLD WEATHER OPERATIONS
HWH leveling and room extension systems are designed to function in cold weather down to 0 degrees Fahrenheit. Below
freezing (32 degrees Fahrenheit) the jacks or rooms will operate slower than usual.
For operation in temperatures dropping below -20 degrees Fahrenheit, it is necessary that the system is equipped with oil
designed for extreme cold weather application such as a synthetic oil. (Contact HWH for recommendations.)
DO NOT run the pump motor continuously.
Continuous operation of the pump with slow moving jacks or rooms in cold weather, without allowing the pump motor to
cool will cause the pump motor to burn up and damage the pump assembly.
It is important that any time the pump runs for more than three minutes
continuing. Continuous operation of the pump motor without allowing the motor to cool can damage the motor.
with a 3" motor; or six minutes with a 3.7" or 4.5" motor that the motor is allowed to cool for thirty minutes before

OPERATING PROCEDURES
MP35.602C
19NOV07
GENERAL INSTRUCTIONS
PREPARATION FOR TRAVEL
If parking on soft ground or asphalt paving, a wood block or
pad should be placed under each jack.
Press the "OFF" button and turn the ignition switch "OFF" at
any time to stop the operation of the system.
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 "HYD" button
is pressed, the "NOT IN PARK/BRAKE" light will come on.
When the "HYD" button is released the "NOT IN PARK/
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
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.
POSITION BEFORE TRAVELING.
FULLY RETRACTED INTO THE STORE/TRAVEL
RESPONSIBILITY TO CHECK THAT ALL JACKS ARE
WARNING LIGHTS. IT IS THE OPERATOR’S
DO NOT RELY SOLELY UPONCAUTION:
ROOM EXTENSION PROCEDURES
MUST be blocked securely. It is recommended that the
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
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.
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 should be fully retracted before traveling.
DO NOT MOVE THE VEHICLE IF ONE
OR MORE JACKS ARE EXTENDED TO THE GROUND.
CAUTION:
needs to be serviced.
BRAKE" light will go out. The panel will NOT turn on.
Any time the "HYD" button has been pushed, push the
"STORE" button before traveling.
vehicle is leveled and stabilized before any rooms are
extended. It is recommended all rooms are retracted
before the leveling system is retracted. It is recommended
the leveling system is not operated when any room extension
is extended.

MP35.602E
18FEB03
AUTOMATIC HYDRAULIC LEVELING
CAUTION:
IMPORTANT: DO NOT interrupt power to the leveling
1. Place transmission in the recommended position for
parking vehicle and set parking brake. Turn the coach
engine off. Turn the ignition to the "ACCESSORY" position.
2. Press the "LEVEL" (HYD) button to enter the hydraulic
operation mode. The ON light will glow steady.
The system will automatically extend the jacks to level the
vehicle and then extend any remaining jacks for stabilizing.
After the system has finished leveling and stabilizing, it will
automatically shut off.
5. Turn the ignition switch to the "OFF" position.
JACK RETRACTION
THE OPERATOR MUST BE SURE THAT
THERE ARE NO OBJECTS UNDER THE VEHICLE AND THAT
ALL PEOPLE ARE CLEAR OF THE VEHICLE.
system while the "STORE" indicator light is blinking.
DO NOT push the "OFF" button or turn the ignition key.
4. If jacks cannot be retracted by the above procedure see
MANUAL JACK RETRACTION Section.
CAUTION: DO NOT RELY SOLELY UPON
WARNING LIGHTS. IT IS THE OPERATOR’S
RESPONSIBILITY TO CHECK THAT ALL JACKS
The system must be allowed to completely finish the
2. Press the "STORE" button. The store indicator light will
flash. As each jack retracts, its red WARNING light will go
out. The system will automatically shut down six minutes 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 thirty minutes, then shut down regardless of the
"WARNING" lights condition.
3. 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.
ARE FULLY RETRACTED INTO THE STORE/TRAVEL
POSITION BEFORE TRAVELING. 1. Start the engine. Store the jacks immediately.
OPERATING PROCEDURES
625 SERIES LEVELING SYSTEM
EXCESS SLOPE SITUATION: In the event the jacks are
unable to level the coach, the "EXCESS SLOPE" light will
come on. Excess slope is two 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.
NOTE: When traveling thermal expansion may cause
a jack to extend slightly. When the "STORE" button
has been used to retract the jacks, the system will
automatically retract any jack that extends due to
thermal expansion.
STORE mode.
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.
3. Press the "LEVEL" button a second time. The ON
indicator light will start to flash. One at a time the jacks
will swing to the vertical position. The red WARNING light
for each jack will come on as it’s respective jack becomes
vertical. At this time, the operator may want to check the
jacks and place a pad under each jack if the ground will
not support the vehicle.
4. Press the "LEVEL" button a third time. The ON light
will start to flash.
JACK POSITIONS
STORE/TRAVEL POSITION
EXTEND POSITION

OPERATING PROCEDURES
MP35.602G
10SEP03
CAUTION:
IMPORTANT: Do not continue to push an EXTEND
MANUAL JACK RETRACTION
MANUAL HYDRAULIC OPERATION
1. Place transmission in the recommended position for parking
2. Press the "LEVEL" (HYD) button.
3. Press the "LEVEL" button a second time. The ON
indicator light will start to flash. One at a time, the jacks will
4. The vehicle may be leveled using the manual EXTEND
buttons on the right half of the panel. If a yellow LEVEL
SENSING light is on, that side, end or corner of the vehicle
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
5. When leveling is completed, push the "OFF" button on the
touch panel and turn the ignition switch to the "OFF" position.
KEEP AWAY FROM THE WHEELS,
DO NOT CRAWL UNDER THE VEHICLE, KEEP A SAFE
DISTANCE IN FRONT AND REAR OF VEHICLE. THE
VEHICLE MAY DROP AND/OR MOVE FORWARD OR
BACKWARD WITHOUT WARNING AS THE VALVE
NOTE: Use the valve release nuts for retracting only if
the "STORE" button on the control panel will not
retract the jacks for travel.
1. Locate the 4 valve release nuts on the solenoid valves
The solenoid valves are located on the pump/valve assembly
2. Allow clearance for vehicle to lower.
4. Retract the rear jacks by opening the two outer valves.
Slowly turn the release nuts counter clockwise. The nuts
may turn easily at first but as an internal spring is compressed,
turning may become more difficult. The valves need only
to be opened enough to retract the jack. DO NOT turn the
5. Retract the front jacks by opening the two center valves as
described in Step 3.
6. Check that all four jacks are now retracted.
7. Close the valves by turning the nuts clockwise.
Once the internal spring tension has been released, the
release nuts will turn free for several turns. Once the
release nuts are snug, DO NOT tighten the nuts past this
point as internal damage may occur to the solenoid.
9. The system should now be repaired before using again.
against wind and activity in the vehicle.
the vehicle, and set the parking brake. Turn the ignition to the
"ACCESSORY" position.
See the "HYDRAULIC LINE CONNECTION DIAGRAM
jacks are fully extended.
RELEASE IS OPERATED.
LEVELING SYSTEM."
PUMP/MANIFOLD ASSEMBLY
LR
LF
RF
RR
10. Push the "STORE" button before traveling.
BREATHER/
FILLER CAP/
NUT DRIVER
The indicator light will glow steady.
swing to the vertical position. The four red WARNING lights
will be on. Place a pad under each jack foot if the ground
will not support the vehicle on the jacks.
Put out any side yellow light before leveling the
vehicle from front to rear.
3. Use the 1/4" nut driver in the end of the breather cap.
clean around the cap before removing. Cover the hole after
removing the cap.
nuts more than 4 1/2 turns.
8. Replace the breather cap.
VALVE
RELEASE
NUTS
is low.

MAINTENANCE
MP45.050H
19NOV07
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
LEVELING JACKS
There are very few user serviceable parts on the leveling
jacks. The jacks require very little maintenance. If the jacks
VISUAL INSPECTION
Periodically inspect the leveling 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 (LEVELING) 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:
are extremely dirty with caked on mud they should be washed.
The jack rods should NOT be wiped and do not need to
be oiled or sprayed with anything. See maintenance,
All four jacks 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.
SYSTEM ADJUSTMENT.

There are two basic adjustments which are made at the time
of installation. However, when adjustment of a leveling unit
is needed, the following procedures are recommended.
Always make vertical adjustment first. If
the vertical adjustment is changed at anytime, be sure to check
the horizontal adjustment. Vertical position is changed by adjusting
Horizontal stop is adjusted by turning the set screws located
just inside the cable locknuts. The jack can be adjusted down
to provide clearance for objects which may interfere with the
operation of the jacks. The horizontal stop must be adjusted
to provide clearance between the hat bracket and mounting
bolts; and the actuator and hose fittings, when the jack is in
the STORE POSITION. The jack must be able to fully extend
in the horizontal position without interfering with suspension com-
Each jack should be checked to be sure
that it is vertical when it swings down. To do this, retract all
jacks, then extend each jack until it is close to, but not touching
the ground. If the jack stopped short of being vertical, it can
be adjusted by loosening the lower adjusting nut and tightening
the upper nut.
The horizontal stop can be adjusted up or down in the slot to
provide clearance for objects which may interfere with operation
MP45.053C
18FEB03
MAINTENANCE
SYSTEM ADJUSTMENT
JACK ADJUSTMENT
ADJUSTING
UPPER
STANDARD &
LOW PROFILE
UNITS
9,000 lb. JACKS
ADJUSTING
LOWER
NUT NUT
STOP
ADJUSTING
HORIZONTAL
ADJUSTMENT
VERTICAL
ADJUSTMENT
LOCK NUTS,
SET SCREW,
6,000 lb. JACKS
ponents, tanks, etc.
NOTE: The two front jacks should be adjusted to the same
horizontal position.
1. 6,000 lb. JACKS:
2. 9,000 lb. JACKS:
the lock nuts on the actuator cable. If the jack stopped short
of vertical, tighten the lock nuts. If the jack goes past vertical,
back the lock nuts off. Be sure to adjust each nut the same
number of turns.
of the jack. The stop must be adjusted so that the jack can be
fully extended in the horizontal position without interfering with
suspension components, tanks, etc.
NOT IN PARK/BRAKE CHECK
Set the park/brake. Switch the ignition to the "ACC" or "ON"
position. Push the "ON/OFF" switch toward "ON". Release
the parking brake and confirm that the "PARK" indicator light
comes on. Reset the parking brake. The "PARK" indicator
light should go out. Switch the ignition to "OFF".
THE COACH WHEELS SECURELY SO THE COACH
CANNOT ROLL FORWARD OR BACKWARD.
CAUTION: 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 for service or repair.
The only maintenance is to keep the jacks clean by washing
and oiling the pivot points several times a year when doing
general maintenance on the vehicle.
The 9000# jack has a roller bearing on the opposite side
from the stop. It needs to roll freely. Oiling the roller bearing
whenever general vehicle maintenance is done is a good
idea. Also oil the pivot point at the same time. The only
other maintenance to the jack is to keep it clean by washing.
PIVOT
POINT
POINT
PIVOT

01JUN10
MP45.271M
MP85.6148
SENSING UNIT MAINTENANCE/SERVICE
± 1 inch side to side on a 36 foot vehicle. Typical leveling results will be better.
The sensing unit has an accuracy tolerance of ± 5.4 inches front to rear and
SENSING UNIT ACCURACY TOLERANCE
SENSING UNIT ADJUSTMENT
There are four LED’s on the Sensing Unit, A,B,C and D. Refer
while making the A-C adjustment.
adjustments first, then hold the adjustment nut from moving
Control Box. If two LED’s are on, it is best to make the B-D
be a problem with the Sensing Unit or the mounting of the
be turned more than 3/4 turn to turn the LED out, there may
to be turned more than 1/2 flat or the adjustment screw has to
screw will turn out LED’s A and C. If the adjustment nut has
the adjustment nut to turn out LED’s B and D. The adjustment
to the drawing below. The Sensing Unit is adjusted by turning
MAY BE DIFFERENT
LED’S - LOCATION A
C
TOP VIEW - SENSING UNIT
D B
7/8, 3/4, 1/2, 5/16 or 1/4 sizes will be needed.
screw driver or sockets w/driver or box end wrenches of
adjustments to the Sensing Unit are needed. A Phillips
are yellow LEVEL lights lit on the Touch Panel, manual
Touch Panel, the sensing unit is properly adjusted. If there
With the vehicle level , if there are no yellow light lit on the
Control Box is mounted to the power unit/valve assembly.
The Sensing Unit is mounted inside the Control Box. The
LEVEL lights. Recheck the level. If more adjustment is
"tweaking" process until the system levels the vehicle
touch panel. Recheck with a level. Repeat the
relevel the vehicle using the yellow level lights on the
the front up more. Again, unlevel the vehicle then
the front yellow light to stay on slightly longer to bring
instructions for LED’s A, B, C, and D. This will allow
the OPPOSITE direction that is given in the above
Move the adjustment for that light very, very, slightly in
which sensing unit light is the front light, A-B-C or D.
yellow level light is turning off too soon. Determine
the vehicle, the front is still low. This means the front
Example: After the initial adjustment and releveling
sensing unit, ignoring the LED’s on the sensing unit.
yellow level lights go out, instead just "tweak" the
needed, DO NOT try to adjust the sensing unit until the
SIDE VIEW - CONTROL BOX
NUT (5/16" OLD) - (1/2" NEW)
ADJUSTMENT
properly.
lights are on. Level the vehicle according to the yellow
vehicle to an unlevel position so one or two yellow
IMPORTANT: When all 4 LED’s are off, move the
If LED (D) is lit: Turn the adjustment nut CLOCKWISE
If LED (B) is lit: Turn the adjustment nut COUNTER
If LED (C) is lit: Turn the adjustment screw CLOCKWISE
If LED (A) is lit: Turn the adjustment screw COUNTER
NOTE: If opposing LED’s are lit, there is a problem with
until the LED is off.
CLOCKWISE until the LED is off.
until the LED is off.
CLOCKWISE until the LED is off.
the Sensing Unit.
ADJUSTMENT SCREW SCREW (Phillips or 1/4")
ADJUSTMENT
NUT (7/8" or 3/4")
(OLD STYLE)
ADJUSTMENT
ADJUSTMENT NUT (5/16" OLD) - (1/2" NEW)
ADJUSTMENT
NUT (7/8" or 3/4")
BOX WALL
CONTROL
(OLD STYLE)
the control box/sensing unit.
be placed on a flat surface close to the mounting location of
use a small bubble level. If using a bubble level, the level should
vehicle trim line to determine level. An alternative would be to
to manually level the vehicle. It is recommended to use the
position the vehicle on a level surface or use the leveling system
To adjust the sensing unit, first the vehicle must be level. Either

NOTE: BEFORE OPERATING VALVE
RELEASE NUTS, READ AND UNDERSTAND
PROCEDURE FOR MANUAL JACK RETRACTION
IN OPERATOR’S INSTRUCTIONS.
HYDRAULIC LINE CONNECTION DIAGRAM
(WITH 4 KICK-DOWN JACKS)
PUMP/MANIFOLD
ASSEMBLY
VALVE
RELEASE
NUTS
SHUTTLE
VALVE
LEFT FRONT
625 SERIES LEVELING SYSTEM
BREATHER
CAP
VELOCITY VALVE
NOTE: SOME
MANIFOLDS
ARE EQUIPPED
WITH VELOCITY
VALVES
RR RF LF LR
PRESSURE
50 PSI
SWITCH
PRESSURE
SWITCH
3000 PSI
LEFT REAR
RIGHT FRONT
RIGHT REAR
12SEP03
MP65.300A

HYDRAULIC
POWER UNIT
M
RELIEF VALVE
RETURN PRESSURE
SOLENOID MANIFOLD
ASSEMBLY
CHECK
VALVE
INNER
CHECK
VALVE
OUTER
SOL.VALVE
LR SOL.VALVE SOL.VALVE SOL.VALVE
RF RRLF
PRESSURE/RETURN
SHUTTLE VALVE
*50 PSI
SWITCH
HYDRAULIC SCHEMATIC
625 SERIES BI-AXIS LEVELING WITH KICK-DOWN JACKS
3000 PSI
SWITCH
LEFT REAR
FRONT
LEFT FRONT
RIGHT
CYLINDER
RIGHT REAR
JACK
JACK
PRESSURE
SWITCH
06JAN06
MP65.603C
*50 PSI SWITCH MAY NOT BE
USED ON ALL 625 MANIFOLDS

ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
HWH COMPUTERIZED LEVELING
LEVEL
STORE
OFF MODE
TRAVEL
CAUTION!
SLOPE
EXCESS
BRAKE
PARK/
NOT IN
MASTER
WARNING
LIGHT
76996121
PARK BRAKE
SWITCH
DIODE 9001 - TO
PARK BRAKE
LIGHT
TOUCH PANEL
BROWN
GRAY
12 PIN
4 PIN 12 PIN
BLACK
BLACK
8 PIN
GRAY
12 PIN
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
AB B A
B A B A
6235
4000
4200 3200
6235
3000
6235
1000
1200 2200
6235
2000
WARNING
SWITCH
SWITCH
PRESSURE PRESSURE
SWITCH
WARNING
SWITCH
SWITCH
WARNING
SWITCH
PRESSURE
SWITCH
WARNING
PRESSURE
SWITCH
SEE 625 SERIES LEVELING
SYSTEM - AIR DUMP -
LEVELING MANIFOLD -
PUMP AND MASTER RELAYS
SEE 625 SERIES LEVELING
SYSTEM - LEVELING
MANIFOLD - AIR DUMP -
PUMP AND MASTER RELAYS 6120
HYD
7699
9000
9000
6120 - TO 12V
ACCESSORY
6230 -
TO HWH
GROUND
STUD 6800
6120
TOUCH
PANEL
HARNESS
LEFT REAR
LEFT FRONT
RIGHT REAR
RIGHT FRONT
MP85.605C
18OCT04

PUMP MASTER
LEVELING MANIFOLD
12 VOLT PUMP AND MASTER RELAYS
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
4 PIN
GRAY 8 PIN
BLACK
12 PIN
BROWN
TO 50 LB PRESSURE SWITCH - 8101
LEVELING MANIFOLD
TO 3000 LB PRESSURE SWITCH - 8100
TO HWH GROUND STUD - 6240
BAA
BBABA
6240
1400
4400
6240
7601
3400
7600
2400
P.E.D P.E.D P.E.D P.E.D
LF
LR
RR
RF
RELAY RELAY
TO +12V
BATTERY
MOTOR
TO PUMP
GROUND STUD
6231 - TO HWH
8600
6800
6230 - TO HWH
GROUND STUD
LEVELING
MANIFOLD
HWH GROUND
STUD TOUCH PANEL
HARNESS
MP85.606C
06JAN06
8500
NOTE: 50 PSI PRESSURE SWITCH MAY
NOT BE USED ON ALL 625 MANIFOLDS.

ELECTRICAL CONNECTION DIAGRAM
CONTROL BOX CONNECTION INFORMATION
SWITCHED GROUND FROM RIGHT FRONT WARNING SWITCH
SWITCHED GROUND FROM LEFT FRONT WARNING SWITCH
12 PIN GRAY CONNECTOR
BLACK
BLACK
COLOR
WIRE
GRAY CONNECTOR
4
3
PIN # NUMBER
2000
1000
WIRE WIRE DESCRIPTION AND FUNCTION
SWITCHED GROUND FROM LEFT FRONT PRESSURE SWITCH
BLACK 12005 SWITCHED GROUND FROM RIGHT FRONT PRESSURE SWITCH
BLACK 22006 SWITCHED GROUND FROM RIGHT REAR PRESSURE SWITCH
BLACK 32007
8BLACK 30009 SWITCHED GROUND FROM LEFT REAR WARNING SWITCH
BLACK 400010 NO CONNECTION
11
SWITCHED GROUND FROM RIGHT REAR WARNING SWITCH
625 SERIES LEVELING SYSTEM
SHARED GROUND FOR WARNING SWITCHES
6235WHITE12
MASTER RELAY CONTROL - SWITCHED +12
3000 LB PRESSURE SWITCH - SWITCHED GROUND
50 LB PRESSURE SWITCH - SWITCHED GROUND (MAY NOT BE USED)
NO CONNECTION
SWITCHED +12 FOR LEFT FRONT SOLENOID VALVE
GROUND FOR RIGHT FRONT SOLENOID VALVE
GROUND FOR RIGHT REAR SOLENOID VALVE
SWITCHED +12 FOR LEFT REAR SOLENOID VALVE
SWITCHED +12 FOR RIGHT REAR SOLENOID VALVE
SWITCHED +12 FOR RIGHT FRONT SOLENOID VALVE
NO CONNECTION
PUMP RELAY CONTROL - SWITCHED +12
12 PIN BROWN CONNECTOR
76006 BLACK
BLACK
BLACK
BLACK
BLACK
12
9
7
8
11
10
8600
7601
3400
2400
BLACK
BLACK
BLACK
BROWN CONNECTOR
1
4
2
3
5
8100
8101
1400
BLACK 4400
CAN LOW
SWITCHED ACC. TO CONTROL BOX
CAN SHIELD
GROUND
SWITCHED ACC OR IGNITION TO TOUCH PANEL
NO CONNECTION
8 PIN BLACK CONNECTOR
GREEN
WHITE
RED
BLACK CONNECTOR
5
7
4
3
1 AND 2
6230
6800
GRAY CONNECTOR 4 PIN GRAY CONNECTOR
SWITCHED +12V BATTERY POWER FROM MASTER RELAY
SWITCHED +12V BATTERY POWER FROM MASTER RELAY
GROUND FROM HWH GROUND STUD
GROUND FROM HWH GROUND STUD
WHITE
WHITE
RED
RED
2
3
4
16800
6230
6230
6800
12 PIN
GRAY
4 PIN
GRAY BLACK
8 PIN
BLACK
12 PIN
BROWN
12 PIN
12 PIN BLACK CONNECTORBLACK CONNECTOR
BLACK 8500
NO CONNECTION
1 THRU 6
7BLACK 9000 SWITCHED GROUND FROM PARK BRAKE SWITCH
NO CONNECTION
8 THRU 10 MASTER WARNING - SWITCHED GROUND
7699BLACK11 NO CONNECTION
12
6 RED 6120
YELLOW8 CAN HIGH
NO CONNECTION
1 AND 2
BLACK 4200 SWITCHED GROUND FROM LEFT REAR PRESSURE SWITCH
06JAN06
MP85.607C

ELECTRICAL CONNECTION DIAGRAM
625 OR 625S SERIES LEVELING SYSTEMS
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
RELAY DESCRIPTIONLED FUSE
1-YELLOW
2-RED
3-YELLOW
4-RED
5-YELLOW
6-RED
7-YELLOW
8-RED
11-YELLOW
RIGHT REAR COIL
12-RED
F1 - 15 AMP
F2 - 15 AMP
F3 - 15 AMP
F4 - 15 AMP
F6 - 5 AMP
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS SEE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
BOX CONNECTION INFORMATION.
IF A YELLOW LED IS LIT AND THE
IF A YELLOW LED IS NOT LIT, THERE IS A
4-PIN CONNECTOR.
PROBLEM WITH INPUT VOLTAGE IN THE
NO RED LED IS COMING ON THERE MAY BE
IF THE YELLOW LED’S ARE WORKING BUT
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
A LIT RED LED INDICATES THERE IS
CORRESPONDING RELAY ON.
IS A GROUND SIGNAL TO TURN THE
NOTE: A LIT YELLOW LED INDICATES THERE
13-YELLOW
14-RED F7 - 5 AMP
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
OR CONNECTION CABLE
F12
F10
F11
F9
F8
F7
F6
F1
F2
F3
F4
1
24
3
6
57
8
19 20
17
18
16
1513
14
11
12
21
22
23
24
25
26
27
28
29 30 31 32 33 34 35
36 37 38
39
LED
FUSE
15-YELLOW
16-RED
17-YELLOW
18-RED
19-YELLOW
20-YELLOW
21-YELLOW
22-YELLOW
23-YELLOW
24-YELLOW
25-RED
26-RED
27-RED
28-RED
29-RED
30-YELLOW
31-GREEN
32-RED
33-GREEN
34-RED
35-RED
36-RED
37-RED
38-RED
39-RED
RIGHT REAR OUTPUT
LEFT REAR COIL
LEFT REAR OUTPUT
RIGHT FRONT COIL
RIGHT FRONT OUTPUT
LEFT FRONT COIL
LEFT FRONT OUTPUT
DUMP COIL - NOT USED
DUMP OUTPUT - NOT USED
MASTER RELAY COIL
MASTER RELAY OUTPUT
PUMP COIL
PUMP OUTPUT
TRAVEL - NOT USED
TRAVEL - NOT USED
CRX 2
CRX 1
LEFT FRONT WARN SW
RIGHT FRONT WARN SW
RIGHT REAR WARN SW
LEFT REAR WARN SW
LEFT FRONT PRESS SW
RIGHT FRONT PRESS SW
RIGHT REAR PRESS SW
LEFT REAR PRESS SW
NOT USED
NOT USED
3000 LB PRESS SW INPUT
MASTER WARN CONTROL
50 LB PRESS SW INPUT
JACK INTERRUPT
PARK BRAKE
BOARD ENABLE
ACCESSORY IN
ACCESSORY OUT
LINK LIGHT
F8 - 5 AMP
F9 - 5 AMP
F10 - 10 AMP
F11 - 3 AMP
THE RED LED (18) WILL NOT BE ON. THE RED LED
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
NORMALLY CLOSED RELAY. WHEN THE YELLOW
NOTE: THE TRAVEL RELAY IS WIRED AS A
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
TRAVEL MODE AND THE IGNITION IS ON.
09SEP09
MP85.608C
RIGHT REAR LEFT REAR
CRX2
FRONT RIGHT FRONT LEFT
CRX1
TRAVEL
PUMP RELAY MASTER RELAY
DUMP
IGN +12 TO TOUCH PANEL F12 - 7.5 AMP

BREATHER CAP - DIPSTICK - 1/4" NUT DRIVER
MP85.999X
20JAN10
VALVE RELEASE
NUT 1 1/2" DIAMETER
SOLENOID VALVE
NOTE: DO NOT turn the valve
release nut more than 4 and 1/2
(four and one half) turns counter
clockwise. Damage to the valve
may result.
OIL LEVEL
BREATHER CAP
OIL LEVEL GROOVES
1/4" NUT DRIVER
NOTE: THE BREATHER CAP IS LOCATED
ON THE TOP SIDE OF THE POWER UNIT RESERVOIR.
IMPORTANT: PRIOR TO REMOVING THE BREATHER CAP,
EITHER TO CHECK THE OIL LEVEL OR TO USE THE 1/4" NUT DRIVER,
CLEAN ANY DEBRIS FROM THE TOP OF THE RESERVOIR.
INCLUDING DEBRIS INSIDE THE 1/4" NUT DRIVER.
REMOVE ANY PAINT CHIPS OR OTHER DEBRIS FROM THE DIPSTICK
BEFORE RETURNING THE BREATHER CAP TO THE RESERVOIR,
VALVE RELEASE
NUT
to the valve may result.
turns counter clockwise. Damage
NOTE: DO NOT turn the valve
release nut more than 2 full
PLASTIC PLUG
REMOVE TO
GAIN ACCESS
TO THE 1/4"
VALVE RELEASE
NUT
SOLENOID VALVE
2 1/4" DIAMETER