HWH 625S Series User manual

OPERATOR’S MANUAL
ML52788/MP04.2808
24OCT13
Single Touch - 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
Straight-Acting Jacks
AP52787
Step Mechanism
RETRACT
EXTEND
HWH COMPUTERIZED LEVELING
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
EMERGENCY
STORE
AUTO
STOP
AUTO
LEVEL
TRAVEL
BRAKE
MODE
CAUTION!
EXCESS
SLOPE
NOT IN
PARK/
R
MANUAL
RETRACT
EXTEND
CORPORATION
W
HH
R
HWH 625S Series, Computer-Controlled
Hydraulic Leveling System
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.

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

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
MP34.0212
10MAR08
GENERAL INSTRUCTIONS
PREPARATION FOR TRAVEL
If parking on soft ground or asphalt paving, a wood block or
pad should be placed under each jack.
Any time a hydraulic leveling process is interrupted, retract
the jacks according to the JACK RETRACTION Section and
then restart the leveling process.
If the hand / auto brake is not set when the "AUTO LEVEL"
button is pressed, the "NOT IN PARK/BRAKE" light will
come on. When the "AUTO LEVEL" button is released the
If the jacks are retracted but a red "WARNING" light is lit
the system needs to be serviced. If the jacks cannot be retracted according to the JACK
RETRACTION Section, retract the jacks according to the
MANUAL JACK RETRACTION Section. The system
should then be checked.
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 "EMERGENCY STOP" 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.

MP34.2708
29APR10
OPERATING PROCEDURES
625 SERIES LEVELING SYSTEM
AUTOMATIC HYDRAULIC LEVELING (HWH TOUCH PANEL CONTROLS)
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
stop the automatic leveling function.
"CANCEL" button on the HWH touch panel will
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 indicator
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. While the system is
stabilizing the vehicle, the yellow level indicator lights
are inhibited from coming on. Stabilizing the vehicle
is accomplished by extending any jacks to the
ground that were not used to level the vehicle. This is
done by monitoring a pressure switch on each jack.
Any jack used to stabilize the vehicle will lift the
vehicle approximately one (1) inch. This "bumps" the
vehicle up slightly when stabilizing. Due to the ½
degree accuracy tolerance of the sensing unit, one or
two yellow level indicator lights may come on after
the red auto level indicator light turns off.
turning the red warning lights out. Push the "STORE" button
or level the vehicle as close as possible according to the
to retract the jacks. Move the vehicle to a more level position
MANUAL HYDRAULIC OPERATION section.
SLOPE" light will remain on if the ignition is in the "ON" or
come on. Excess slope is one or two jacks fully extending
unable to level the coach, the "EXCESS SLOPE" light will
EXCESS SLOPE SITUATION: In the event the jacks are
"ACC" position, until the jacks have been fully retracted
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

MP34.2805
26APR10
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
625 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 2 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 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.
stop the automatic store function.
"CANCEL" button on the HWH touch panel will
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 with either the
touch panel or the remote rocker switch, 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
MP34.3335
07AUG13
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 will be equipped with a valve
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
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
the closed position.
7. The system should now be repaired before using again.
NOTE: The valve release cam should be slightly loose
when in the closed position.
6. Close the valves by moving the valve release cam to
MANIFOLD
OPEN
VALVE
CLOSED
CLOSE
WITH VALVE
RELEASE CAM
BREATHER
CAP
SMALL STYLE
OPENED
VALVE
4. Repeat the process for the rear jacks by opening
the two outer valves.
NOTE: The manual UP and DOWN arrows will not
function if the system is in the Auto Level or Auto
Store modes.

OPERATING PROCEDURES
STEP EXTEND PROCEDURE
2. Unlock all locking devices.
or has been used, remove it before extending the
WARNING:
extend and unfold the step and handrail.
3. To extend the step, press and hold the STEP CONTROL
in the "EXTEND" position until the step is fully extended and
halt the operation of the step.
KEEP PEOPLE AND OBSTRUCTIONS
CLEAR OF STEP WHEN OPERATING. STEP AND
NOTE: If a MANUAL RETRACT DEVICE is attached
NOTE: Make sure there is adequate clearance to fully
NOTE: Releasing the STEP CONTROL will
NOTE: The park brake must be set before a step can
be extended or retracted.
is fully extended or stops moving.
"EXTEND" position for more than ten seconds after the step
seconds after the step is fully extended. This assures
Hold the control to "EXTEND" three or four
proper pressurization of the cylinders.
Do not hold the STEP CONTROL in theIMPORTANT:
NOTE:
stops moving, or the step and handrail seem to be binding,
release the step control immediately. DO NOT force the
MP34.7004
07MAY12
DISENGAGED BEFORE OPERATING THE STEP.
RETRACTING DEVICES ARE DETACHED OR
THAT ALL STEP LOCKING, CLAMPING OR MANUAL
THE OPERATOR’S RESPONSIBILITY TO ENSURE
PERSONAL INJURY AND VEHICLE DAMAGE. IT IS
DEVICES ATTACHED OR ENGAGED CAN CAUSE
LOCKING, CLAMPING OR MANUAL RETRACTING
WARNING: OPERATING A STEP WITH ANY
It is recommended to complete the Leveling Procedure
before operating steps.
step.
If either side of the step
Service for assistance 1-800-321-3494.
HANDRAIL WILL UNFOLD AFTER STEP IS
FULLY EXTENDED.
unfolds the lower part of the assembly and handrails.
step. If direction of movement is reversed, be careful to
not damage the steps or handrail. Contact HWH Customer
to operate the step. Refer to the vehicle manufacturer for
information concerning a master power switch.
1. There may be a master power switch that must be on

OPERATING PROCEDURES
STEP RETRACT PROCEDURE
2. To retract the step press and hold the STEP CONTROL
in the "RETRACT" position until the step is fully retracted.
halt the operation of the step.
3. Engage any locking devices.
IMPORTANT: Step-locking devices should
be locked while traveling.
WARNING:
CLEAR OF STEP WHEN OPERATING. LOWER STEP
KEEP PEOPLE AND OBSTRUCTIONS
4. If the step will not retract see the MANUAL STEP
RETRACT PROCEDURE.
NOTE:
NOTE:NOTE: Releasing the STEP CONTROL will
The park brake must be set before a step can
be extended or retracted.
of movement is reversed, be careful to not damage the
immediately. DO NOT force the step. If the direction
handrail seems to be binding, release the step control
If either side of the step stops moving, or the step and
step is fully retracted or stops moving.
"RETRACT" position for more than ten seconds after the
Do not hold the STEP CONTROL in the
Hold the switch to "RETRACT" three or four
seconds after the step is fully retracted. This assures
proper pressurization of the cylinders.
IMPORTANT:
NOTE:
MP34.7005
07MAY12
It is recommended to retract step
extensions before retracting jacks.
AND HANDRAIL WILL FOLD UP BEFORE THE STEP
STARTS TO RETRACT.
The lower step and handrail will fold up before the step
starts to retract.
step or handrail. Contact HWH Customer Service for
assistance 1-800-321-3494.
1. There may be a master power switch that must be on
information concerning a master power switch.
to operate the step. Refer to the vehicle manufacturer for

OPERATING PROCEDURES
MP34.9860A
01OCT13
MANUAL STEP RETRACT PROCEDURES
If the system is equipped with an auxiliary pump run switch or an auxiliary hand pump, refer to the "OPERATING PROCEDURES"
pages for the pump run switch or hand pump before using the manual step retract procedure. Use this procedure if a step
control switch does not work only if the main pump or hand pump will not retract the step.
WARNING: KEEP AWAY FROM PINCH POINTS OF
STEPS AND HANDRAIL WHILE FOLDING STEPS. PINCH
POINTS CAN CAUSE SERIOUS INJURY.
1. Locate the correct valves for the step being retracted.
Contact vehicle manufacturer for location.
2. Open the EXTEND and RETRACT solenoid valves for the
step. Move the valve release cams to the open position.
3. Lift the bottom step up and fold it back onto the main
step assembly. The handrail(s) should fold to the retract
position at the same time.
4. It may be possible to simply push the step back in. If not,
use the manual retract bolt on the front of the step. Use a
13/16 wrench or 1/4" allen wrench to slowly turn the bolt
clockwise until the step is retracted. DO NOT use an impact
5. Close both step solenoid valves.
IMPORTANT: THE MANUAL RETRACT BOLT MUST BE
TURNED COUNTERCLOCKWISE UNTIL IT IS BACK TO
THE OPERATE POSITION. TURN THE BOLT COUNTER-
CLOCKWISE UNTIL IT STOPS BUT DO NOT OVER
TIGHTEN IT. THE RETRACT BOLT MUST BE TURNED
BACK TO THE OPERATE POSITION BEFORE THE STEP
CAN BE EXTENDED.
SIDE VIEW WITH STEP EXTENDED
FOLD STEP
FROM HERE
RETRACT
MANUAL
BOLT
MAY HAVE 1, 2 OR NONE
HANDLE ASSEMBLIES
wrench.
SHOWN IN
POSITION
EXTEND SOLENOID VALVE
CLOSED
POSITION
TO
OPEN
EXT
RET
OPEN
SHOWN IN
VALVE RELEASE CAM
CLOSE
TO
IMPORTANT: ONLY MOVE THE RELEASE CAM
IN THE DIRECTION SHOWN. MOVING THE CAM
IN THE OPPOSITE DIRECTION CAN DAMAGE
THE VALVES.

MAINTENANCE
MP44.0013A
24OCT13
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 jacks should be cycled at least once a month or
whenever the coach is serviced. 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.
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 four jacks, and the step mechanism 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.

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 - TOP VIEW
D
C
A
B
LED’S - LOCATION
CONTROL BOX - SIDE VIEW
MAY BE DIFFERENT
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.
20APR09
MP44.1501
ADJUSTMENT
NUT (7/8" or 3/4")
BOX WALL
CONTROL
SCREW (Phillips or 1/4")
ADJUSTMENT
NUT (5/16" OLD) - (1/2" NEW)
ADJUSTMENT
SENSING UNIT ADJUSTMENT
adjustments first, then hold the adjustment nut from moving
while making the A-C adjustment.
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
There are four LED’s on the Sensing Unit, A,B,C and D. Refer
Control Box is mounted to the power unit/valve assembly.
The Sensing Unit is mounted inside the Control Box. The
level the vehicle until the bubble is centered.
level, ignoring the yellow LEVEL lights on the Touch Panel,
that is to be level. Using the Leveling System and the bubble
the freezer floor or upon whichever surface within the vehicle
Level the vehicle by placing a bubble level in the center of
the vehicle, the front is still low. This means the front
"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
properly.
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
LEVEL lights. Recheck the level. If more adjustment is
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.
(OLD STYLE)
ADJUSTMENT SCREW (Phillips or 1/4")
ADJUSTMENT NUT (5/16" OLD) - (1/2" NEW)
MP45.3259
ADJUSTMENT NUT (7/8" or 3/4")
(OLD STYLE)
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. A Phillips screw driver or sockets w/driver or box
end wrenches of 7/8, 3/4, 1/2, 5/16 or 1/4 sizes will be needed.
SENSING UNIT MAINTENANCE/SERVICE

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

MP64.9500B
24OCT13
STEP MECHANISM
HYDRAULIC LINE CONNECTION DIAGRAM
ROD
END
CAP END
NOTE: EACH STEP IS PLUMBED
AS SHOWN TO AN INDIVIDUAL
REVERSIBLE PUMP
NOTE: LEVELING MANIFOLD NOT SHOWN
RELEASE
VALVE
STEP CYLINDER
RETRACT VALVE
STEP CYLINDER
EXTEND VALVE
BREATHER/
FILLER CAP
CAM RELEASE
VALVE
CAM

ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
+
_
MASTER
WARNING
LIGHT BUZZER
5AMP
FUSE
DIODE
76997699
6111 6111
7699
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 ELECTRICAL CONNECTION
DIAGRAM - 625 SERIES
LEVELING SYSTEM - LEVELING
MANIFOLD - PUMP AND
7699
9000
9000
LEFT REAR
LEFT FRONT
RIGHT REAR
RIGHT FRONT
MP84.2252
26APR10
TO IGNITION
TO ACCESSORY
6120
MASTER RELAYS
GREEN
12 PIN
6110
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
HWH COMPUTERIZED LEVELING
EXTEND
RETRACT
WARNING!
DUMP
MANUAL
CANCEL
LEVEL
AUTO
STORE
AUTO
PARK/
NOT IN
MODE
BRAKE
TRAVEL
SLOPE
EXCESS
R
MANUAL
RETRACT
EXTEND
NOTE: THE DIODE ASSEMBLY MAY NOT BE PRESENT
ON ALL SYSTEMS. THE 9000 WIRE MAY CONNECT
DIRECTLY TO A WIRE PROVIDED BY THE CHASSIS
OR VEHICLE MANUFACTURER.

MP84.2450
17JUN09
4 PIN
GRAY
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
8600
6800
LEVELING
MANIFOLD
HWH GROUND
STUD TOUCH PANEL
HARNESS
8500
MOTOR
PUMP
MOTOR
TO PUMP
+
RELAY
PUMP RELAY MASTER
BATTERY
TO HOUSE
GROUND STUD
6230 - TO HWH
6231 - TO HWH
GROUND STUD
8 PIN
BLACK
CN8
CN7
BLACK
12 PIN
CN3
12 PIN
BROWN
12 PIN
GRAY
CN6
LEVELING MANIFOLD - PUMP AND MASTER RELAYS
625 OR 625S SERIES LEVELING SYSTEM
SECTION IV - ELECTRICAL CONNECTION DIAGRAM
MP85.102K

ELECTRICAL CONNECTION DIAGRAM
MP84.2601A
24OCT13
625 SERIES LEVELING SYSTEM
TOUCH PANEL CONNECTIONS
LINK LIGHT
GROUND FROM CONTROL BOX
CAN SHIELD
CAN LOW
CAN HIGH
YELLOW
GREEN
WIRE
COLOR
4
3
2
1
WHITE
PIN # NUMBER
6230
WIRE WIRE DESCRIPTION AND FUNCTION
PIN 1
SWITCHED BATTERY FROM CONTROL BOX
6800RED
5
5 PIN MTA CONNECTOR
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
CAUTION!
BRAKE
TRAVEL
EMERGENCY
STOP MODE
PARK/
NOT IN
EXCESS
R
SLOPE
MANUAL
RETRACT
EXTEND