HWH 625, 625S, 725 Operator's Manual

R

H

CORPORATION

W

H

OPERATOR’S MANUAL

R

HWH TOUCH PANEL-CONTROLLED

625 SERIES LEVELING SYSTEM

FEATURING:

Touch Panel Leveling Control

BI-AXIS Hydraulic Leveling

Straight-Acting Jacks

(Optional Manual Pilot Dump)

R

HWH COMPUTERIZED LEVELING

UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES

SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.

Ph: 800/321-3494 (or) 563/724-3396 | Fax: [phone]

R

ON

AUTO

STORE

OFF

2096 Moscow Road | Moscow, Iowa 52760

EXCESS

SLOPE

NOT IN
PARK/

BRAKE

TRAVEL

MODE

CAUTION!

HWH CORPORATION

(On I-80, Exit 267 South)

www.hwh.com

AP28848

ML29619/MP05.6002

17DEC02

OPERATOR’S MANUAL

CAUTION !

READ THE ENTIRE OPERATOR MANUAL BEFORE OPERATING.

BLOCK FRAME AND TIRES SECURELY BEFORE CRAWLING UNDER VEHICLE. DO NOT USE LEVELING JACKS OR
AIR SUSPENSION TO SUPPORT VEHICLE WHILE UNDER VEHICLE OR CHANGING TIRES. VEHICLE MAY DROP
AND/OR MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.

KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE OPERATING LEVELING SYSTEM OR ROOM EXTENSIONS.

KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE DUMPING AIR FROM THE VEHICLE’S SUSPENSION.

DO NOT MOVE THE VEHICLE IF THE VEHICLE IS NOT AT THE PROPER RIDE HEIGHT. CONTACT MANUFACTURER
TECHNICAL SERVICE FOR MOVING THE VEHICLE WHEN NOT AT THE PROPER RIDE HEIGHT.

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

FIRST:

vehicle or had the leveling system installed. Dealership
management people are in the best position to resolve
the problem quickly. If the dealer has difficulty solving
the problem, he should immediately contact the Customer
Service Department, at HWH CORPORATION.

SECOND:

notify the Customer Service Department:
HWH CORPORATION 2096 Moscow Rd. Moscow IA. 52760
[phone] OR [phone]. Give your name and
address, coach manufacturer and model year, date the
coach was purchased, or the date of system installation,

Notify the dealership where you purchased the

If your dealer cannot or will not solve the problem,

problem, please do the following:

description of the problem, and where you can be reached
during business hours (8:00 a.m. till 5:00 p.m. c.s.t.).
HWH CORPORATION personnel will contact you to
determine whether or not your claim is valid. If it is, HWH
CORPORATION will authorize repair or replacement of the
defective part, either by appointment at the factory or by the
authorization of an independent service facility, to be
determined by HWH CORPORATION. All warranty repairs
must be performed by an independent service facility
authorized by HWH CORPORATION, or at the
HWH CORPORATION factory, unless prior written approval
has been obtained from proper HWH CORPORATION
personnel.

MP15.9800

08FEB06

CONTROL IDENTIFICATION

625 SERIES LEVELING SYSTEM

COMPUTER-CONTROL

HYDRAULIC
OPERATION
Indicator light

ON/AUTO
Button

"NOT IN PARK"
Indicator light

STORE
Indicator light

"STORE"
Button

"OFF"
Button

"TRAVEL MODE"
Indicator light

HWH COMPUTERIZED LEVELING

ON

AUTO

STORE

OFF

UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES

SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.

RAISE LEFT SIDE
Manual button

LOWER LEFT SIDE
Manual button

R

EXCESS

SLOPE

NOT IN
PARK/

BRAKE

TRAVEL

MODE

CAUTION!

"EXCESS SLOPE"
Indicator light

(Y)

(R)

(Y)

(R)

(R)

(Y)

(R)

(Y)

LOWER FRONT
Manual button

RAISE FRONT
Manual button

JACK DOWN
Indicator light
(4) red (R)

RAISE RIGHT SIDE
Manual button

LOWER RIGHT SIDE
Manual button

LEVEL SENSING
Indicator light
(4) yellow (Y)

RAISE REAR
Manual button

LOWER REAR
Manual button

CONTROL FUNCTIONS

CONTROL BUTTONS

ON/AUTO (I) BUTTON:

operation button. The on indicator light is above the (I)
button.

"OFF" BUTTON:

operation.

"STORE" BUTTON:

"STORE" button. This button is used to automatically retract
the jacks.

EXTEND BUTTONS (UP ARROWS):

extend their respective jack pairs to lift the vehicle.

RETRACT BUTTONS (DOWN ARROWS):

will retract their respective jack pairs to lower the vehicle.

HYDRAULIC OPERATIONS (I) LIGHT:

that the panel is active.

This is the on button and automatic

Push the "OFF" button to stop hydraulic

The store indicator light is above the

These buttons will

These buttons

INDICATOR LIGHTS

This light indicates

INDICATOR LIGHTS (Continued)

STORE LIGHT: This light indicates that the system

is in STORE mode.

"TRAVEL MODE" LIGHT:

when the ignition is on, when the jacks are retracted and
there are no red WARNING lights on.

LEVELING LIGHTS:

level sensing indicators. When a yellow light is on, it
indicates that its side, end, or corner of the vehicle is low.
No more than two lights should be on at the same time.

JACK DOWN LIGHTS:

yellow level indicators are jacks down WARNING lights.
They are functional only when the ignition is in the "ON"
or "ACC" position, the system is on, and the jacks are
extended 1/4 to 1/2 inch.

MASTER "JACKS DOWN" WARNING LIGHT:

light mounted in the dash separate from the touch panel.
It will be on when any one or more jacks are extended
and the ignition is "ON".

This indicator light will be on

The four yellow indicating lights are

The four red lights surrounding the

This is a

"NOT IN PARK/BRAKE" LIGHT:

when the hand/auto brake is not set and the "LEVEL"
button is being pushed.

This indicator will light

BUZZER:

master "JACKS DOWN" warning light is on.

This is a jacks down warning. It will sound if the

MP25.6010

16MAY07

OPERATING PROCEDURES

GENERAL INSTRUCTIONS

Maintain adequate clearance in all directions for vehicle, room
extensions, awnings, doors, steps, etc. Vehicle may move in
any direction due to jacks extending or retracting, settling of
the jacks or the vehicle, equipment malfunction, etc..

If parking on soft ground or asphalt paving, wood blocks or
pads must be placed under the jacks.

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 ""I"" button
is pressed, the "NOT IN PARK/BRAKE" light will come on.
When the ""I"" button is released the "NOT IN PARK/
BRAKE" light will go out. The panel will NOT turn on.

CAUTION:

OR MORE JACKS ARE EXTENDED TO THE GROUND.

DO NOT MOVE THE VEHICLE IF ONE

PREPARATION FOR TRAVEL

Before traveling, the red jack warning lights must be off
and the "TRAVEL MODE" light must be on. If lights are
not correct for travel, retract jack as described in the
JACK RETRACTION Section.

If the jacks are retracted but a red "WARNING" light is lit
or the green "TRAVEL MODE" light is not lit, the system
needs to be serviced. INTO THE STORE/TRAVEL POSITION AND THE

If this vehicle is equipped with manual pilot dump, make sure
the pilot dump equipment is in the correct position traveling.

Any room extension should be fully retracted before traveling.

VEHICLE IS EQUIPPED WITH STRAIGHT-ACTING JACKS.
MOVING THE VEHICLE WITH THE LEVELING JACKS
EXTENDED CAN CAUSE SEVER 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

VEHICLE IS AT THE PROPER RIDE HEIGHT FOR
TRAVELING.

Any time the ""I"" button has been pushed, push the
"STORE" button before traveling.

DO NOT MOVE THE VEHICLE WHILE CAUTION:

THE LEVELING JACKS ARE STILL IN CONTACT WITH
THE GROUND OR IN THE EXTEND POSITION. THIS

FOR VEHICLES EQUIPPED WITH MANUAL SUSPENSION PILOT DUMP

If the vehicle is equipped with an air suspension, the air must
be dumped from the vehicle suspension before leveling the
vehicle. The vehicle will be equipped with a Manual Pilot
Dump. Refer to the vehicle owner’s manual for the proper
operation of the air dump equipment.

ROOM EXTENSION PROCEDURES

IMPORTANT: If the vehicle is equipped with a room
extension read this section carefully.

If the vehicle is equipped with kick-down jacks, the wheels
MUST be blocked securely. It is recommended to complete
the Leveling Procedure before operating room extensions.
It is recommended to retract room extensions before
retracting jacks.

MP35.103J

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.

CAUTION: Do not travel if the air dump equipment is
not in the proper position for traveling or the vehicle
is not at the proper ride height for traveling.

Refer to the vehicle owners manual for proper operation of
room extensions.

IMPORTANT: Do not use a room extension support
when the vehicle is supported by the leveling system.

MP35.601C

19NOV07

OPERATING PROCEDURES

625 SERIES LEVELING SYSTEM

AUTOMATIC HYDRAULIC 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.

NOTE: If the vehicle has an air suspension, the air
must be dumped from the suspension before proceeding.

2. Press the "LEVEL" button to enter the hydraulic
operation mode. The LEVEL light will glow steady.

3. At this time, the operator may want to check the jacks
and place pads under the jacks if the ground will not
support the vehicle.

4. Press the "LEVEL" button a second time.
The "LEVEL" light will start to flash.

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, and has
completed the air dump cycle, it will automatically shut off.

JACK RETRACTION

WARNING:

THERE ARE NO OBJECTS UNDER THE VEHICLE AND THAT
ALL PEOPLE ARE CLEAR OF THE VEHICLE.

1. Start the engine. Store the jacks immediately.

NOTE: If this vehicle is equipped with an air suspension,
refer to the vehicles owners manual to return the
suspension to the proper ride height for traveling.

THE OPERATOR MUST BE SURE THAT

EXCESS SLOPE SITUATION: In the event the jacks are

unable to level the coach, the "EXCESS SLOPE" light will
come on. Excess slope is one or 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.

5. Turn the ignition switch to the "OFF" position.

SEVERE DAMAGE TO THE JACKS AND OR THE VEHICLE AND
CREATE A DRIVING HAZARD. DO NOT RELY SOLELY UPON
WARNING LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY TO
CHECK THAT ALL JACKS ARE FULLY RETRACTED INTO
THE STORE/TRAVEL POSITION AND THE VEHICLE IS AT
THE PROPER RIDE HEIGHT.

EXTENDED POSITION

STORE/TRAVEL POSITION

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.

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.

IMPORTANT: DO NOT interrupt power to the leveling
system while the "STORE" indicator light is blinking.
DO NOT push the "OFF" button or turn the ignition key.
The system must be allowed to completely finish the
STORE mode.

WARNING:

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

DO NOT MOVE THE VEHICLE WHILE THE

JACK POSITIONS

3. The vehicle can be moved as soon as the red warning
lights are out, the jacks are in the STORE/TRAVEL position,
the green "TRAVEL MODE" light is on, and the suspension
air bags are inflated to the vehicles proper ride height.

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.

4. If jacks cannot be retracted by the above procedure see
MANUAL JACK RETRACTION Section.

NOTE: If the vehicle is parked or stored with the jacks
extended for an extended period of time and the jacks
fail to retract completely, extend the jacks back down
to the ground then retract the jacks again.

MP35.601E

30APR10

OPERATING PROCEDURES

MANUAL JACK RETRACTION

MANUAL JACK RETRACTION

WARNING:KEEP AWAY FROM THE WHEELS,

DO NOT CRAWL UNDER THE VEHICLE, KEEP A SAFE
DISTANCE IN FRONT AND REAR OF THE VEHICLE.
THE VEHICLE MAY DROP AND/OR MOVE FORWARD
OR BACKWARD WITHOUT WARNING AS THE VALVE
RELEASE IS OPERATED.

IMPORTANT: HWH recommends that all HWH room
extensions are fully retracted prior to performing
manual jack retraction procedures.

Use the manual valve release for retracting the jacks only
if the STORE feature on the HWH control panel will not
retract the jacks.

1. Locate your power unit-manifold assembly.
(The diagram below represents a typical Power Unit­Manifold Assembly it may not be an exact match to yours).

NOTE: Multiple manifolds may be present on the
power unit. The upper most manifold should control
jack functions. (Valve styles and arrangements will vary)

2. Allow clearance for the vehicle to lower.

3. Using the diagram below identify the style
of your two center valves.

Large style with T-Handle valve release:

will turn several turns easily. As the valve starts to open,
the T-Handle will turn harder. Make sure the valves have
been opened far enough to allow the jacks to retract.

Small style with Valve Release Nut: DO NOT

1/4" valve release nut more than . Turning
the nut more could damage the valve.

Large style with Valve Release Nut:

release nut is located under a plastic plug that must be
removed to gain access. Open valve 1-1/2 to 2 full turns.

DO NOT
2 full turns.

valve. Replace the protective plastic plug.

4. Retract the front jacks by opening the two center valves.
Slowly turn the manual valve releases counter clockwise
until the jacks start to retract.

5. Repeat the process by identifying then opening
the two outer valves, if applicable.

6. Check that all jacks are now retracted. If yes, continue.
If no, notify the dealership where you purchased the vehicle
or had the leveling system installed or contact
HWH Corporation customer service.

turn the 1/4" valve

Turning the nut more could damage the

4 and 1/2 turns

release nut more than

The T-Handle

turn the

The 1/4" Valve

NOTE: As of APRIL 2002 a 1/4" Nut Driver has been
incorporated into the Breather Cap. Before using read
and understand the last page of this manual.

MANIFOLD

MP35.384N

7. Close the valves by turning each valve release clockwise.

IMPORTANT: Once the manual valve release is snug,
DO NOT tighten the manual valve release past this
point as internal damage may occur to the solenoid.

8. The system should now be repaired before using again.

LARGE STYLE
WITH T-HANDLE
VALVE RELEASE

SMALL STYLE
WITH VALVE
RELEASE NUT

PLASTIC PLUG

LARGE STYLE
WITH VALVE
RELEASE NUT

POWER UNIT-MANIFOLD ASSEMBLY

BREATHER
CAP

MP35.601G

09MAR10

MAINTENANCE

OIL LEVEL

It is important that the four leveling jacks are fully retracted

before checking the hydraulic oil level. To check the oil
supply, remove the breather cap from the top of the hydraulic
oil reservoir. The oil level should be approximately one inch
below the top of the reservoir when adequately filled.

FLUID: HWH Specialty Hydraulic Oil is recommended. In an
emergency Dexron automatic transmission fluid can be used.

NOTE:

and can cause staining should a leak occur. DO NOT USE
brake fluid or hydraulic jack fluid. Use of these can damage
seals.

Dexron automatic transmission fluid contains red dye

ELECTRICAL SYSTEM

The batteries should be in good condition and fully charged.

Weak batteries can cause erratic operation. Battery cable

terminals and battery posts and connections should be kept

clean.

All electrical connections, especially ground connections,
should be clean, tight, free from corrosion and protected
from weathering.

UNUSUAL CONDITIONS

If driving conditions are unusually muddy, the jacks may
become caked or clogged with mud. This condition may
hamper the proper operation of the leveling system. This
problem may be prevented or remedied by cleaning off each
leveling jack if they become excessively muddy.

In wet or icy weather leveling jacks may become encrusted

with ice. This may cause the leveling system to function
improperly. To eliminate this problem, periodically check the
leveling jacks and break loose any ice which may be
causing improper operation.

Do not move the vehicle while the leveling jacks are still in
contact with the ground. Retract the jacks according to the
"JACK RETRACTION" section and then visually check to
see if the leveling jacks have returned to the
STORE/TRAVEL position.

NOTE:

with rebuilt parts or can be sent to HWH CORPORATION to
be rebuilt, when the system is out of warranty.

All major components of the system can be replaced

Review the operator manual and run the system in the

automatic and manual mode. Note any abnormal operation.
Check that all lights work according to the INDICATOR

LIGHT section. Correct function of the four red WARNING
lights is essential to the correct operation of the system.

Check that the vehicle is level when all the yellow LEVEL

indicator lights are out.

Contact you dealer or HWH Corporation for assistance.

Review the JACK RETRACTION Section.

NOT IN PARK/BRAKE LIGHT CHECK

1. Turn the ignition on.

2. Set the park brake.

3. Turn the leveling system on.

4. Apply the foot brake or chock the wheels so the
vehicle cannot move.

OPERATIONAL CHECK

Make sure the jacks will fully retract to the store position.
Jacks should not interfere with any part of the vehicle when
in the store position.

With the jacks extended, check that the jacks can be
retracted using the "T" handles on the solenoid valves.
Refer to the MANUAL JACK RETRACTION section.

Check the air dump system by using the manual "DUMP"
button according to the MANUAL AIR DUMP section. If the
system will not dump air or return to the proper ride height,
contact your dealer or HWH Corporation.

5. Release the park brake. The Leveling System panel
should turn off.

6. Apply the park brake.

7. If the panel does not turn off when the park brake is
released, the system needs to be checked.

MP45.050C

14MAR07

SENSING UNIT MAINTENANCE/SERVICE

SENSING UNIT ACCURACY TOLERANCE

The sensing unit has an accuracy tolerance of ± 5.4 inches front to rear and

± 1 inch side to side on a 36 foot vehicle. Typical leveling results will be better.

SENSING UNIT ADJUSTMENT

To adjust the sensing unit, first the vehicle must be level. Either
position the vehicle on a level surface or use the leveling system
to manually level the vehicle. It is recommended to use the
vehicle trim line to determine level. An alternative would be to
use a small bubble level. If using a bubble level, the level should
be placed on a flat surface close to the mounting location of
the control box/sensing unit.

With the vehicle level , if there are no yellow light 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.

The Sensing Unit is mounted inside the Control Box. The

Control Box is mounted to the power unit/valve assembly.

There are four LED’s on the Sensing Unit, A,B,C and D. Refer

to the drawing below. The Sensing Unit is adjusted by turning

the adjustment nut to turn out LED’s B and D. The adjustment
screw will turn out LED’s A and C. If the adjustment nut has

to be turned more than 1/2 flat or the adjustment screw has to
be turned more than 3/4 turn to turn the LED out, there may
be a problem with the Sensing Unit or the mounting of the
Control Box. If two LED’s are on, it is best to make the B-D
adjustments first, then hold the adjustment nut from moving
while making the A-C adjustment.

TOP VIEW - SENSING UNIT

A

LED’S - LOCATION
MAY BE DIFFERENT

D B

NOTE: If opposing LED’s are lit, there is a problem with
the Sensing Unit.

If LED (A) is lit: Turn the adjustment screw COUNTER
CLOCKWISE until the LED is off.

If LED (C) is lit: Turn the adjustment screw CLOCKWISE
until the LED is off.

If LED (B) is lit: Turn the adjustment nut COUNTER
CLOCKWISE until the LED is off.

If LED (D) is lit: Turn the adjustment nut CLOCKWISE
until the LED is off.

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 just "tweak" the
sensing unit, ignoring the LED’s on the sensing unit.

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. Determine
which sensing unit light is the front light, A-B-C or D.
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.

SIDE VIEW - CONTROL BOX

CONTROL
BOX WALL

(OLD STYLE)
ADJUSTMENT
NUT (7/8" or 3/4")

MP85.6148

C

ADJUSTMENT

(OLD STYLE)
ADJUSTMENT
NUT (7/8" or 3/4")

ADJUSTMENT SCREW
ADJUSTMENT NUT (5/16" OLD) - (1/2" NEW)

NUT (5/16" OLD) - (1/2" NEW)

ADJUSTMENT

SCREW (Phillips or 1/4")

MP45.271M

01JUN10

HYDRAULIC LINE CONNECTION DIAGRAM

625 OR 625S SERIES LEVELING SYSTEMS

(WITH 4 STRAIGHT-ACTING JACKS)

NOTE: BEFORE OPERATING ANY MANUAL VALVE RELEASE
READ AND UNDERSTAND PROCEDURE FOR MANUAL JACK

RETRACTION IN OPERATOR’S INSTRUCTIONS.

IS SHOWN WITH (1) LARGE VALVE WITH A VALVE RELEASE
"T"-HANDLE, (2) SMALL VALVES WITH VALVE RELEASE NUTS
AND (1) LARGE VALVE WITH A VALVE RELEASE NUT.

BREATHER
CAP

THIS MANIFOLD

LEFT
FRONT

SMALL VALVES
WITH RELEASE
NUTS

LARGE VALVE
WITH RELEASE
"T" HANDLE

CHECK PUMP
PRESSURE
HERE

NOTE: SOME
MANIFOLDS
ARE EQUIPPED
WITH VELOCITY
VALVES

LR RR

LF RF

LARGE VALVE
WITH RELEASE
NUT LOCATED
UNDER
PLASTIC PLUG

SHUTTLE
VALVE

50 PSI
PRESSURE
SWITCH

RIGHT
FRONT

NOTE: 50 PSI
PRESSURE
SWITCH MAY NOT
BE USED ON ALL
625 MANIFOLDS.

3000 PSI
PRESSURE
SWITCH

LEFT
REAR

MP65.2802

PUMP/MANIFOLD
ASSEMBLY

(ROOM EXTENSION MANIFOLD NOT SHOWN)

VELOCITY VALVE

RIGHT
REAR

MP65.600C

08SEP09

8

HYDRAULIC SCHEMATIC DIAGRAM

625 - 625S - 725 SERIES LEVELING SYSTEM

LEVELING SYSTEM

SOLENOID MANIFOLD

ASSEMBLY

JACK SOLENOID

VALVES (4)

LR

STEEL TUBE

LF

INNER
CHECK VALVE (4)

OUTER
CHECK

VALVE (4)

SHUTTLE VALVE
800 PSI TO
SHIFT SHUTTLE
VALVE

50 PSI

SWITCH

RF

50 PSI SWITCH
MAY NOT
BE ON ALL
625 MANIFOLDS

3000 PSI
SWITCH

RR

M

LEFT

FRONT

JACK
PRESSURE
SWITCH

JACK
CYLINDER

LEFT REAR RIGHT REAR

LEVELING SYSTEM

SOLENOID MANIFOLD

ASSEMBLY

PRESSURE PORT

HYDRAULIC POWER

STEEL TUBE

LR

LF

RF

RELIEF VALVE
3500 PSI

3000 PSI PSW

RR

NOTE: LARGE SOLENOID VALVES
SHOWN. MANIFOLD MAY BE
EQUIPPED WITH TWO OR FOUR
SMALL SOLENOID VALVES

50 PSI PSW

SHUTTLE VALVE

RIGHT
FRONT

TOP VIEW

MP65.601C

12MAR1

ELECTRICAL CONNECTION DIAGRAM

625 SERIES LEVELING SYSTEM

PARK BRAKE - MASTER WARNING LIGHT AND BUZZER

TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES

LF RF

PRESSURE
SWITCH

WARNING
SWITCH

AB B A

6235

1000

PRESSURE

SWITCH

WARNING

SWITCH

2000

6235

1200 2200

MASTER

WARNING

LIGHT

FUSE
5AMP

CONNECT TO
IGNITION

BUZZER

TOUCH PANEL

R

HWH COMPUTERIZED LEVELING

EXCESS

ON

SLOPE

AUTO

NOT IN
PARK/

STORE

BRAKE

TRAVEL
MODE

OFF

CAUTION!

UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES

SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.

SEE 625 SERIES LEVELING

+

_

SYSTEM - LEVELING
MANIFOLD - PUMP

DIODE

6120 - TO

AND MASTER RELAYS

ACCESSORY

6111 6111

76997699

7699

PARK BRAKE
SWITCH

DIODE

9000

9001 - TO
PARK BRAKE
LIGHT

7699
9000

4 PIN
GRAY

12 PIN
BROWN

TOUCH
PANEL
HARNESS

6230 ­TO HWH

GROUND
SEE 625 SERIES LEVELING
SYSTEM - LEVELING

STUD

6800
MANIFOLD - PUMP
AND MASTER RELAYS

PRESSURE PRESSURE
SWITCH

LR RR

WARNING
SWITCH

SWITCH

WARNING

SWITCH

12 PIN
BLACK

8 PIN
BLACK

12 PIN
GRAY

B A B A

6235

4000

4200 3200

3000

6235

MP85.010Y

16APR09

ELECTRICAL CONNECTION DIAGRAM

625 SERIES LEVELING SYSTEM

PUMP AND MASTER RELAYS

TO 50 LB PRESSURE SWITCH - 8101

3400

B
A

7601
2400

B
A

7600
1400

B
A

6240
4400

B
A

6240

TO HWH GROUND STUD - 6240

TO 3000 LB PRESSURE SWITCH - 8100

P.E.D P.E.D P.E.D P.E.D

LEVELING MANIFOLD

LEVELING MANIFOLD

RR

RF

LF

LR

LEVELING
MANIFOLD

HWH GROUND
STUD

8600

8500

12 PIN
BROWN

4 PIN
GRAY

8 PIN
BLACK

TOUCH PANEL
HARNESS

6230 - TO HWH
GROUND STUD

6800

TO PUMP
MOTOR

6231 - TO HWH
GROUND STUD

TO HOUSE
BATTERY

PUMP MASTER
RELAY RELAY

MP85.058C

02OCT03

ELECTRICAL CONNECTION DIAGRAM

6

625 SERIES LEVELING SYSTEM

CONTROL BOX CONNECTION INFORMATION

12 PIN

PIN 1
PIN 12

PIN 1
PIN 12

PIN 1
PIN 4

PIN 1
PIN 8

PIN #

GRAY CONNECTOR 4 PIN GRAY CONNECTOR

1
2
3
4

BROWN CONNECTOR

1
2
3
4
5

7
8
9
10
11
12

1 THRU 6
7
8 THRU 10

12

BLACK CONNECTOR

1 AND 2
3
4
5
6 RED 6121
7

GRAY CONNECTOR

1 AND 2
3
4

8

11

WIRE

COLOR

RED
RED
WHITE
WHITE

BLACK
BLACK
BLACK

BLACK
BLACK

BLACK
BLACK
BLACK

BLACK

BLACK 9000

RED
WHITE

GREEN
YELLOW8

BLACK
BLACK
BLACK
BLACK 22006
BLACK 32007
BLACK 4200
BLACK
BLACK 400010

WIRE

NUMBER

6800
6800
6230
6230

8500
8100
8101

1400
76006 BLACK
7601
4400
3400
2400

8600

7699BLACK11

6800
6230

1000
2000
12005

30009

6235WHITE12

4 PIN
GRAY

+12V BATTERY POWER FROM PUMP RELAY
+12V BATTERY POWER FROM PUMP RELAY
GROUND FROM HWH GROUND STUD
GROUND FROM HWH GROUND STUD

12 PIN BROWN CONNECTOR

MASTER RELAY CONTROL - SWITCHED +12V
3000 LB PRESSURE SWITCH - SWITCHED GROUND
50 LB PRESSURE SWITCH - SWITCHED GROUND
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 +12V

12 PIN BLACK CONNECTORBLACK CONNECTOR

NO CONNECTION
SWITCHED GROUND FROM PARK BRAKE SWITCH
NO CONNECTION
BUZZER CONTROL - SWITCHED GROUND
NO CONNECTION

8 PIN BLACK CONNECTOR

NO CONNECTION
SWITCHED BATTERY
GROUND
CAN SHIELD
IGNITION/ACC. +12V
CAN LOW
CAN HIGH

12 PIN GRAY CONNECTOR

NO CONNECTION
SWITCHED GROUND FROM LEFT FRONT WARNING SWITCH
SWITCHED GROUND FROM RIGHT FRONT WARNING SWITCH
SWITCHED GROUND FROM LEFT FRONT PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT FRONT PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT REAR PRESSURE SWITCH
SWITCHED GROUND FROM LEFT REAR PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT REAR WARNING SWITCH
SWITCHED GROUND FROM LEFT REAR WARNING SWITCH
NO CONNECTION
SHARED GROUND FOR WARNING SWITCHES

BROWN

12 PIN
BLACK

8 PIN
BLACK

PIN 12

WIRE DESCRIPTION AND FUNCTION

PIN 1

12 PIN
GRAY

MP85.065C

14DEC1

ELECTRICAL CONNECTION DIAGRAM

625 OR 625S SERIES LEVELING SYSTEMS

CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION

REAR

RIGHT

1

2

SENSING UNIT

+12V
REAR
RIGHT SIDE
FRONT
LEFT SIDE
GROUND

NOTE: FOR DETAILED INPUT / OUTPUT INFORMATION ABOUT
PIN CONNECTIONS SEE ELECTRICAL CONNECTION
DIAGRAM - CONTROL BOX CONNECTION INFORMATION.

NOTE: A LIT YELLOW LED INDICATES THERE IS A GROUND
SIGNAL TO TURN THE CORRESPONDING RELAY ON.

A LIT RED LED INDICATES THERE IS
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.

IF A YELLOW LED IS LIT AND THE
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.

IF THE YELLOW LED’S ARE WORKING BUT NO RED LED
IS COMING ON THERE MAY BE PROBLEM WITH INPUT
VOLTAGE IN THE 4-PIN CONNECTOR.

F1

LED

FUSE

LEFT

REAR

3

4

12

11

DUMP

F2

F6

CRX2

19

14

13

RELAY

MASTER

RIGHT

FRONT

5

6

16

F7

15

RELAY

PUMP

21
22
23
24
25
26
27
28

OLD
BOARD
LOCATION

FRONT

F3

F8

29 3130

LEFT

7

F4

8

18

F9

17

TRAVEL

32

33 34 35

(39)

9 383736

CRX1

20

F12

36 3837

F10

PF3

1-YELLOW
2-RED
3-YELLOW
4-RED
5-YELLOW
6-RED
7-YELLOW
8-RED
11-YELLOW
12-RED
13-YELLOW
14-RED F7 - 5 AMP
15-YELLOW
16-RED
17-YELLOW
18-RED
19-YELLOW
20-YELLOW
21-YELLOW
22-YELLOW

PF4 (F11)

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) 9-RED

NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
TRAVEL MODE AND THE IGNITION IS ON.

NOTE: THE TRAVEL RELAY IS NOT USED ON
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
SYSTEMS.

RELAY DESCRIPTIONLED FUSE

RIGHT REAR COIL
RIGHT REAR OUTPUT

F1 - 15 AMP
LEFT REAR COIL
LEFT REAR OUTPUT

F2 - 15 AMP
RIGHT FRONT COIL
RIGHT FRONT OUTPUT

F3 - 15 AMP
LEFT FRONT COIL
LEFT FRONT OUTPUT

F4 - 15 AMP
DUMP COIL
DUMP OUTPUT

F6 - 5 AMP
MASTER RELAY COIL
MASTER RELAY OUTPUT
PUMP COIL
PUMP OUTPUT

F8 - 5 AMP
TRAVEL COIL
TRAVEL OUTPUT

F9 - 5 AMP
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

F10 - 10 AMP
ACCESSORY OUT FOR
MASTER WARNING

PF4 (F11)
LINK LIGHT

IF A YELLOW LED IS NOT LIT, THERE IS A PROBLEM WITH
THE CONTROL BOX, TOUCH PANEL OR CONNECTION CABLE.

LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
LATER LED’S 3 AND 19 WILL TURN OFF.

MP85.184J

NOTE: ON NEWER CONTROL BOXES, FUSE F11 AND FUSE
F12 HAVE BEEN REPLACED WITH POLY SWITCHES PF4
AND PF3. POLY SWITCHES PROTECT A COMPONENT OR
WIRE AS A FUSE DOES EXCEPT THE POLY SWITCH WILL
ALLOW CURRENT THROUGH WHEN THE OVERLOAD OR
SHORT IS REMOVED. POLY SWITCHES ARE NOT
REPLACEABLE.

MP85.184C

08SEP09

BREATHER CAP - DIPSTICK - 1/4" NUT DRIVER

PLASTIC PLUG
REMOVE TO
GAIN ACCESS
TO THE 1/4"
VALVE RELEASE
NUT

VALVE RELEASE
NUT

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.

2 1/4" DIAMETER
SOLENOID VALVE

NOTE: DO NOT turn the valve
release nut more than 2 full
turns counter clockwise. Damage
to the valve may result.

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.

BEFORE RETURNING THE BREATHER CAP TO THE RESERVOIR,

REMOVE ANY PAINT CHIPS OR OTHER DEBRIS FROM THE DIPSTICK

INCLUDING DEBRIS INSIDE THE 1/4" NUT DRIVER.

NOTE: THE BREATHER CAP IS LOCATED

1/4" NUT DRIVER

OIL LEVEL

OIL LEVEL GROOVES

BREATHER CAP

MP85.999X

20JAN10