HWH 2000 SERIES User manual

OPERATOR’S MANUAL
ML43723/MP04.3942
27OCT08
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
2000 SERIES LEVELING SYSTEM
HWH COMPUTER-CONTROLLED
R
Single-Acting Front Jacks
AP43722
R
HWH COMPUTERIZED LEVELING
CAUTION!
OFF
TRAVEL
MODE
NOT IN
PARK/
BRAKE
EXCESS
SLOPE
Single-Acting Rear Jacks
FOR TRAILERS
AUTO
ON
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
STORE
W
CORPORATION
HH
R
Auxiliary Hand Pump

WARNING !
READ THE ENTIRE OPERATOR’S MANUAL BEFORE OPERATING.
MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.
KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE LEVELING SYSTEM IS IN USE.
CAUSING INJURY OR DEATH.
CHIPS, OIL LEAKS, ETC. FOLLOW ALL OTHER APPLICABLE SHOP SAFETY PRACTICES.
OPERATOR’S MANUAL
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
NEVER PLACE HANDS OR OTHER PARTS OF THE BODY NEAR HYDRAULIC LEAKS. OIL MAY PENETRATE SKIN
WEAR SAFETY GLASSES WHEN INSPECTING OR SERVICING THE SYSTEM TO PROTECT EYES FROM DIRT, METAL
MP14.000
3
08DEC1
0
IMPORTANT: IF VEHICLE IS EQUIPPED WITH A ROOM EXTENSION, READ ROOM EXTENSION SECTION BEFORE
OPERATING LEVELING SYSTEM.
WHILE HITCHING OR UNHITCHING, AVOID AREAS WHERE BODY MAY BE CRUSHED BY SUDDEN DROPPING OR SLIDING
OF THE TRAILER.
DO NOT LIFT TOW VEHICLE WITH LEVELING SYSTEM.
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.

MP24.2281
18DEC09
"OFF" BUTTON:
operation.
ON/AUTO (I) BUTTON:
"STORE" BUTTON:
"STORE" button. This button is used to automatically retract
the jacks.
JACK DOWN LIGHTS:
"NOT IN PARK/BRAKE" LIGHT:
"TRAVEL MODE" LIGHT:
when there is power to the control box, if the jacks are
CONTROL FUNCTIONS
INDICATOR LIGHTSCONTROL BUTTONS
Push the "OFF" button to stop hydraulic
The store indicator light is above the
N/A.
This indicator light will be on
EXTEND BUTTONS (UP ARROWS):
RETRACT BUTTONS (DOWN ARROWS):
LEVELING LIGHTS:
These buttons will
extend the jacks to lift the vehicle.
These buttons
will retract the jacks to lower the vehicle.
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.
This is the on button and automatic
The four red lights surrounding
the yellow level indicators are jacks down WARNING
lights. They are functional only when the system is on,
operation button. The on indicator light is above the (I)
CONTROL IDENTIFICATION
625/2000 SERIES LEVELING SYSTEM
COMPUTER-CONTROL
and the jacks are extended 1/4 to 1/2 inch.
button.
HYDRAULIC OPERATIONS (I) LIGHT:
HWH COMPUTERIZED LEVELING
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
CAUTION!
HYDRAULIC
Indicator light
STORE
Indicator light
"TRAVEL MODE"
ON/AUTO
Indicator light
OPERATION
Indicator light
"NOT IN PARK"
Button
"OFF"
Button
"STORE"
Button
Manual button
LOWER LEFT SIDE
Manual button
RAISE LEFT SIDE
Indicator light
"EXCESS SLOPE"
EXCESS
STORE
AUTO
OFF
ON
TRAVEL
MODE
SLOPE
NOT IN
BRAKE
PARK/
R
Manual button
LOWER REAR
Manual button
RAISE REAR
(4) yellow
Indicator light
LEVEL SENSING
Manual button
LOWER RIGHT SIDE
Manual button
RAISE RIGHT SIDE
Indicator light
JACK DOWN
Manual button
RAISE FRONT
Manual button
LOWER FRONT
(4) red
This light indicates
that the panel is active.
STORE LIGHT: This light indicates that the system
is in STORE mode.
SEE MANUAL LEVELING PROCEDURE.
retracted and there are no red WARNING lights on.
ONOFF
MASTER POWER
SWITCH (OPT.)
HWH. The system should have a master power switch.
to the HWH control system. This is an optional switch from
This switch controls powerMASTER POWER SWITCH:

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
MP34.0216
23FEB10
GENERAL INSTRUCTIONS
PREPARATION FOR TRAVEL
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 master power switch
"OFF" at any time to stop the operation of the system.
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.
TO CHECK THAT ALL JACKS ARE FULLY RETRACTED
LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY
HAZARD. DO NOT RELY SOLELY UPON WARNING
AND OR THE VEHICLE AND CREATE A DRIVING
EXTENDED CAN CAUSE SEVERE DAMAGE TO THE JACKS
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 should be fully retracted before traveling.
DO NOT MOVE THE VEHICLE IF ONE
OR MORE JACKS ARE EXTENDED TO THE GROUND.
WARNING:
needs to be serviced. INTO THE STORE/TRAVEL POSITION.
Any time the ""I"" button has been pushed, push the
"STORE" button before traveling.
ROOM EXTENSION PROCEDURES
the vehicle before extending the room.
IMPORTANT: It is recommended to level and stabilize
IMPORTANT: Extending or retracting any leveling jacks
when the room is extended is not recommended.
IMPORTANT: If the vehicle is equipped with a room
extension read this section carefully.
when the vehicle is supported by the leveling system.
IMPORTANT: Do not use a room extension support
Refer to the vehicle owner’s manual for proper operation of
room extensions.
on for the leveling system to operate.
The HWH or OEM supplied master power switch must be
JACK STYLES
This trailer may be equipped with (4) Double - Acting jacks,
(4) Single - Acting jacks or (2) Double - Acting and (2) Single -
Acting jacks. It is important to understand the style of jack on
your trailer to make sure the system is functioning properly.
Double - Acting jacks: Are power up and power down
with two hydraulic hoses going to each jack. Double - Acting
hydraulic hose going to each jack. Single - Acting jacks
Single - Acting jacks: Are power down only with one
have return springs.
jacks have no return springs.

OPERATING PROCEDURES
SET UP AND AUTOMATIC LEVELING PROCEDURE
Trailer must be unhitched from the tow vehicle before
leveling. The HWH front jacks may be used to lift the trailer for
unhitching. If auxiliary jacks are used to unhitch the trailer,
If parking on soft ground or asphalt paving, a wood block or
for unhitching.
pad should be placed under each jack.
will result if raise arrows are operated for an extended
period of time.
NOTE: Refer to the trailer manufacturer owner’s manual
IMPORTANT: Overheating and excessive current drain
30APR10
MP34.2710
extend the HWH front jacks to the ground and retract the
auxiliary jacks before the leveling system is used for leveling.
operation mode. The ON light will glow steady.
2. Press the "ON/AUTO" button to enter the hydraulic 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 extended
without turning the yellow level light out. The system will not
stabilize the vehicle if the "EXCESS SLOPE" light comes on.
One or more jacks may be extended. The system will shut
off leaving the "EXCESS SLOPE" light on. The "EXCESS
SLOPE" light will remain on if there is power to the control
box, until the jacks have been fully retracted using the
"STORE" button, turning the red warning lights out. Refer
to the HITCHING AND STORING JACKS section. Move
the trailer to a more level position or level the trailer as close
as possible according to the MANUAL LEVELING section.
4. 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.
The ON light will start to flash.
5. Press the "ON/AUTO" button a second time.
vehicle and then extend any remaining jacks for stabilizing.
The system will automatically extend the jacks to level the
1. Turn the HWH master power switch on.
3. Use the front UP arrow manual button to extend the
front jacks to unhitch the trailer.
Manual leveling will operate when the EXCESS SLOPE
6. Turn the HWH master key switch off.
light is on.
Before starting the auto level procedure, at least one
front leveling jack must be firmly on the ground
supporting the weight of the trailer. If the rear yellow
level light is lit, both front red warning lights must be
lit along with at least one front leveling jack firmly on
If these requirements are not met, the system will
remain idle when the "ON/AUTO" button is pushed
the second time.
the ground.
The system will level the trailer front to rear (if needed)
before leveling side to side. If the rear yellow level indicator
is on, the system will lower the front of the trailer to level the
trailer. If the front jacks are Double - Acting jacks, the pump
will run while the front is lowering. After the system has
finished leveling and stabilizing, it will automatically shut off.
NOTE: The system will only lower the front of the trailer
if the rear level light is on when the "ON/AUTO" button
is pushed the second time. If the rear light is not on or
goes out while lowering the trailer, no lowering
procedure is used after that no matter what level light
may come on.
If either front red warning light goes out while the front
is lowering, the system will discontinue the leveling
procedure and shut off.

MP34.2809
27OCT08
WARNING:
IMPORTANT: DO NOT interrupt power to the leveling
HITCHING AND STORING JACKS
THE OPERATOR MUST BE SURE THAT
THERE ARE NO OBJECTS UNDER THE TRAILER AND
THAT ALL PEOPLE ARE CLEAR OF THE TRAILER.
system while the "STORE" indicator light is blinking.
DO NOT push the "OFF" button or turn power off to
WARNING: DO NOT MOVE THE TRAILER WHILE THE
LEVELING JACKS ARE STILL IN CONTACT WITH THE GROUND
OR IN THE EXTEND POSITION. THIS TRAILER IS EQUIPPED
WITH STRAIGHT-ACTING JACKS. MOVING THE TRAILER
WITH THE LEVELING JACKS EXTENDED CAN CAUSE
SEVERE DAMAGE TO THE JACKS AND OR THE TRAILER AND
CREATE A DRIVING HAZARD. DO NOT RELY SOLELY UPON
WARNING LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY TO
CHECK THAT ALL JACKS ARE FULLY RETRACTED INTO
the system. The system must be allowed to
3. The trailer can be moved as soon as the red warning
lights are out, the jacks are in the STORE/TRAVEL position
and the green "TRAVEL MODE" light is on.
THE STORE/TRAVEL POSITION.
OPERATING PROCEDURES
625/2000 SERIES LEVELING SYSTEM
completely finish the STORE mode.
IMPORTANT: The "STORE" button will not function
until the weight of the trailer is off the front jacks.
2. Push the "ON" button. The ON light will glow
steady.
3. Push the rear down arrow (RETRACT button) until
the weight of the trailer is off the rear jacks.
4. Hitch the trailer to the tow vehicle according to the
manufacturers instructions. Use the existing landing
gear or the front UP (EXTEND jacks) and DOWN
(RETRACT jacks) arrows.
1. After the trailer is securely hitched to the tow vehicle,
and the weight of the trailer is off of the front jacks, push
the "STORE" button. All 4 jacks will retract. The panel
will automatically turn off 1 minute after the last of the
four red warning lights go out. If any red warning light
remains on, the system will continue to try to store the
jacks for 20 minutes, then shut the panel off.
ONLY USE THE "STORE" BUTTONWARNING:
IF THE TRAILER IS HITCHED TO A TOW VEHICLE
OR SECURELY SUPPORTED BY THE EXISTING
LANDING GEAR.
HITCHING
1. The HWH master key switch must be on to hitch
the trailer and store the jacks.
STORING JACKS
2. Turn the HWH master power switch off before traveling.

OPERATING PROCEDURES
MANUAL LEVELING
Trailer must be unhitched from the tow vehicle before
leveling. The HWH front jacks may be used to lift the trailer
for unhitching. If auxiliary jacks are used to unhitch the trailer,
If parking on soft ground or asphalt paving, a wood block or
for unhitching.
pad should be placed under each jack.
will result if raise arrows are operated for an extended
period of time.
2. The touch panel must be on for the system to function.
4. A lit yellow LEVEL light indicates that the side, end or
corner of the trailer is low.
5. After the trailer is level, the jacks not used for leveling
may be extended until they touch the ground. This provides
6. Push the "OFF" button on the touch panel to turn the
additional stability against wind and activity in the trailer.
system off.
NOTE: Refer to the trailer manufacturer owner’s manual
IMPORTANT: Overheating and excessive current drain
04JAN10
MP34.3014
extend the HWH front jacks to the ground and retract the
auxiliary jacks before the leveling system is used for leveling.
Jacks used to stabilize the trailer should lift the trailer
1. Turn the HWH master key switch on.
3. Use the front UP arrow buttons to extend the front
jacks and unhitch the trailer.
7. Turn the HWH master power switch off.
Pushing the up arrow for
too uneven, the jacks may not have enough stroke to level
level light priority when leveling the trailer. If the ground is
out all the yellow lights. Always give a front or rear yellow
jack pair to level the vehicle. Extend jacks as needed to put
corresponding yellow level lights will extend that jack or
If the rear yellow level light is on,
it is recommended to push the front down arrow until the
rear yellow light goes out.
the trailer. The trailer may have to be moved.
NOTE: No matter what type of jacks the trailer is
equipped with, the pump will always run when an
UP (raise) arrow is pushed.
The pump will run when pushing any DOWN (lower)
arrow if the trailer has (4) Double - Acting jacks.
If the trailer has (2) Double - Acting and (2) Single -
Acting jacks, the pump will only run if the front DOWN
(lower) arrow is pushed.
about 3/4 inch.

OPERATING PROCEDURES
MP34.9901
23SEP13
AUXILIARY HAND PUMP OPERATION
The auxiliary hand pump can be used to extend or retract
the landing gear, jacks or room extensions anytime the pump
HITCHED TO THE TOW VEHICLE BEFORE OPENING
SUPPORTED BY AUXILIARY STANDS OR SECURELY
ANY VALVES.
WARNING: THE VEHICLE SHOULD BE
IMPORTANT: FOLLOW THE "SET UP" AND
"PREPARATION FOR TRAVEL" PROCEDURES
WHEN USING THE AUXILIARY HAND PUMP.
AUXILIARY
HAND PUMP
HANDLE
The auxiliary hand pump is a two stage pump that will produce
enough pressure to extend the landing gear and lift the vehicle
as well as retract the landing gear. When operating the auxiliary
pump to lift the vehicle or when the jacks are fully retracted, the
pump handle will seem to "snap" as the pump goes to the
second stage. The pumping action will be easier at first as the
second stage starts to create more pressure.
To operate the auxiliary hand pump, open the appropriate
solenoid valve. Insert the hand pump handle into the handle
receptacle and move the handle in an up and down motion.
The auxiliary hand pump may work easier if only one
valve is open at a time. Be careful to not twist the
vehicle if only one solenoid valve is open.
It is recommended to operate the auxiliary hand
pump occasionally to check it’s operation.
FRONT VIEW END VIEW
CLOSE
OPEN
OPERATING
MOTION
will not function.
RELEASE CAM
IMPORTANT: ONLY MOVE THE RELEASE CAM
IN THE DIRECTION SHOWN. MOVING THE CAM
IN THE OPPOSITE DIRECTION CAN DAMAGE
THE VALVES.
RET
JACK
EXT
P42088
LEFT
RET
P42089
RIGHT
EXT JACK
EXT
B-STYLE
RET
P42091
ROOM
TOP VIEW
NOTE: If a room cannot be retracted using the
auxiliary hand pump, see "MANUAL ROOM
RETRACTION PROCEDURES".
NOTE: The hand pump will swivel to any position
which will ease the operation of the hand pump.
number of functions and the items controlled by each pair of
valves one each for the extend and retract procedures. The
NOTE: Each hydraulic function requires a pair of solenoid
solenoid valves will very for each system. The diagrams shown
on this page represent a (3) function system of (2) jacks and
(1) room as indicated by the labels shown in FIG 1. Use the
labels specific to your system when following these procedures.
FIG 1
ROOM
B-STYLE
JACK
RIGHT
EXT
RET
RET
P42089
EXT
P42091
IF A LARGE VALVE IS USED, OPEN THE VALVE
BY REMOVING THE PLASTIC PLUG THEN TURN
THE 1/4" VALVE RELEASE NUT NO MORE THAN
2 FULL TURNS COUNTER CLOCKWISE.
PLUG
PLASTIC
Room control solenoid valves may be located at the
synchronizing cylinder, not on the pump manifold.

MAINTENANCE
It is important that the four leveling units 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.
In general, to insure the smooth operation of the leveling
system, it is a good idea to occasionally check the individual
leveling units to prevent problems. This is especially true
under the unusual conditions stated in the following:
If driving conditions are unusually muddy, the units 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 unit if they become excessively muddy.
In wet or icy weather leveling units may become encrusted
with ice. This may cause the leveling system to function
improperly. To eliminate this problem, periodically check the
leveling units and break loose any ice which may be causing
Do not move the trailer while the leveling units are still in
All major components of the system can be replaced
with rebuilt units or can be sent to HWH CORPORATION to
be rebuilt, when the system is out of warranty.
contact with the ground. Visually check to see if the leveling
units have returned to the STORE/TRAVEL position before
moving the trailer.
MP44.000
2
21NOV1
6
UNUSUAL CONDITIONS
NOTE:
OIL LEVEL
improper operation.
FLUID: HWH Specialty Hydraulic Oil is recommended. In a
n
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 dy
e
emergency Dexron automatic transmission fluid can be used
.
seals.
NOTE:
should be washed with soap and water as soon as possible
when traveling in winter conditions.
on highways in the winter, leveling system components
Due to chemicals now usedWINTER WEATHER DRIVING:
JACK PRESSURE SWITCH ADJUSTMENT
may not come all the way down and lift as necessary.
be lifted too high. If the switches are set too low the jacks
The switches are adjustable. If set too high, the trailer will
front when checking the switches.
The trailer should be completely loaded especially at the
approximately 1/2".
The jacks should lift the trailer slightly when stabilizing,
trailer is properly stabilized after the leveling process is
The jack pressure switches are used to make sure the
complete.
LOCKING
SWITCH
BODY
NUT SEALING
WASHER
not twisted. Loosen the locking nut. Turn the threaded
turn before checking the system. Remember to tighten the
clockwise to decrease pressure. Use no more than a half
adjustment clockwise to increase pressure or counter-
Before adjusting the switch, unplug the switch so the wire is
ADJUSTMENT
PRESSURE
locking nut when finished.
BODY
WINTER WEATHER DRIVING
anti-icing / deicing agents, thoroughly wash jacks with warm
components, such as HWH jacks.
To help reduce the corrosion of jacks after exposure to
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,
soapy water.

MAINTENANCE
MP44.0009
15JAN10
PRIMING THE HAND PUMP
JACK CONTROL HYDRAULIC SWITCH
NEUTRAL POSITION
To prime the hand pump, it will be necessary to remove a
hose from one of the jacks. One of the front jacks would be
HAND PUMP
HANDLE
MOTION
OPERATING
If the system has Double-Acting cylinders on the front,
remove the rod end hose from either of the front jacks.
Place the end of the hose in a bucket. Make sure the
tank is at least half full. Pump the hand pump until a
healthy flow of oil is coming from the hose.
Reattach the hose and retry the hand pump. Repeat the
procedure if the hand pump does not move the jacks.
TANK
best, but use the easiest hose to get to.
IMPORTANT: DO NOT ALLOW THE FLUID LEVEL IN
THE TANK TO LOWER MORE THAN 1 INCH BEFORE
ROD END
CAP END
ADDING FLUID.
If the system has only Single-Acting jacks with return springs,
remove the easiest hose to access and place the end in a
bucket. Using the release cam, manually open the EXTEND
solenoid valve for that jack (if equipped with solenoid valves)
or move the jack control hydraulic switch to "EXTEND" for
that jack. Make sure the tank is at least half full. Pump the
hand pump until a healthy flow of fluid comes from the hose.
procedure if the hand pump does not move the jacks.
Reattach the hose and retry the hand pump. Repeat the
THE TANK TO LOWER MORE THAN 1 INCH BEFORE
IMPORTANT: DO NOT ALLOW THE FLUID LEVEL IN
ADDING FLUID.
EXTEND
POSITION
TO
CLOSED
HANDLE
HAND PUMP
TANK
EXT
RET
EXTEND SOLENOID VALVE
SINGLE ACTING JACKS
(CAP END HOSE -
EXT
EXT
EXT
EXT
RET
RET
RET
RET
OPEN CLOSE
TO
VALVE RELEASE CAM
SHOWN IN
POSITION OPEN
POSITION
SHOWN IN
(CAP AND ROD END HOSES)
DOUBLE-ACTING JACKS
NO ROD END HOSE -
WITH RETRACT SPRINGS)

01MAR10
MP44.1500
± 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
ADJUSTMENT SCREW
SENSING UNIT ADJUSTMENT
to the drawing below. The Sensing Unit is adjusted by turning
ADJUSTMENT
NUT (7/8" or 3/4")
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
MAY BE DIFFERENT
LED’S - LOCATION
BOX WALL
CONTROL
(OLD STYLE)
A
C
TOP VIEW - SENSING UNIT
D B
end wrenches of 7/8, 3/4, 1/2, 5/16 or 1/4 sizes will be needed.
needed. A Phillips screw driver or sockets w/driver or box
Touch Panel, manual adjustments to the Sensing Unit are
properly adjusted. If there are yellow LEVEL lights lit on the
are no yellow lights lit on the Touch Panel, the sensing unit is
With the vehicle level according to the bubble level, if there
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
lights are on. Level the vehicle according to the yellow
"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
LEVEL lights. Recheck the level. If more adjustment is
SCREW (Phillips or 1/4")
ADJUSTMENT
SIDE VIEW - CONTROL BOX
NUT (5/16" OLD) - (1/2" NEW)
ADJUSTMENT
NUT (7/8" or 3/4")
(OLD STYLE)
ADJUSTMENT
properly.
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 NUT (5/16" OLD) - (1/2" NEW)
SENSING UNIT MAINTENANCE/SERVICE
MI15.4550

HYDRAULIC LINE CONNECTION DIAGRAM
MP64.3908
14APR10
LEFT FRONT JACK RIGHT FRONT JACK
2000 SERIES LEVELING SYSTEM
4 - SINGLE-ACTING JACKS
LEFT REAR JACK RIGHT REAR JACK
CAP END HOSE TOCAP END HOSE TO
JACK
RETRACT
WITH 5/16" HOSE ENDS.
MAY BE 5/16" HOSE OR 1/4" HOSE
FOR DOUBLE-ACTING JACKS ONLY
NOTE: THE CAP END HOSE
RIGHT REAR JACKLEFT REAR JACK
CAP END HOSE TO
RIGHT FRONT JACK
CAP END HOSE TO
LEFT FRONT JACK
THE SYSTEM. IMPROPER HOSE ROUTING WILL DAMAGE
SURE HOSE ROUTINGS ARE CORRECT BEFORE OPERATING
BETWEEN THE CAP AND ROD END OF THE JACKS. MAKE
IMPORTANT: DO NOT SWAP FITTINGS OR REVERSE HOSES
SYSTEM COMPONENTS.
DIFFERENTLY. CONTACT HWH FOR ASSISTANCE.
NOTE: EARLY SYSTEMS MAY BE PLUMBED
NOTE: LEFT FRONT AND RIGHT FRONT
JACK RETRACT VALVES MAY BE
LARGE SOLENOID VALVES.
EXT
LF EXT
RF LR
EXT EXT
RR
L F R F L R R R
VALVES (4)

ELECTRICAL CONNECTION DIAGRAM
MP84.0000
21DEC09
2000 SERIES CAN SYSTEM FOR TRAILERS
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
HWH COMPUTERIZED LEVELING
TRAVEL
CAUTION!
OFF
STORE
MODE
BRAKE
PARK/
NOT IN
EXCESS
AUTO
ON SLOPE
FRONT THIS
SIDE
UP
TOUCH PANEL SENSING UNIT
PRESSURE
SWITCH
WARNING
SWITCH
PRESSURE
SWITCH
SEE ELECTRICAL
CONNECTION DIAGRAM
CONTROL MODULE
CONNECTION
6235
1000
2000
6235
INFORMATION
1200 2200
DO NOT CUT
TERMINATING
RESISTOR
SYSTEM
PSW
8100
CONTROL MODULE
MANIFOLD CONNECTIONS
DIAGRAM - LEVELING
SEE ELECTRICAL CONNECTION
NOT REMOVE
RESISTOR DO
TERMINATING
8100
PUMP RELAYS
DIAGRAM - MASTER AND
SEE ELECTRICAL CONNECTION
RFLF
WARNING
SWITCH
PRESSURE
SWITCH B A
3200
6235
3000
LEFT REAR
WARNING
4200
PRESSURE
SWITCH
4000
B A SWITCH
6235 RIGHT REAR
RRLR
GROUND
GROUND BOLT
ON SIDE OF PUMP
LEFT FRONT RIGHT FRONT
P.E.D
AB
P.E.D
BA
WARNING
SWITCH
6230
CONNECTIONS AND SWITCH BY INSTALLER
TO INSTALLER PROVIDED
+12 VOLT MASTER SWITCH
MASTER
SWITCH
TO VEHICLE
BATTERY - FUSE
AS REQUIRED BY
APPLICABLE
ELECTRICAL
CODES

MP84.1502
21DEC09
ELECTRICAL CONNECTION DIAGRAM
2000 SERIES CAN SYSTEM FOR TRAILERS
6245
LR-E = LEFT REAR JACK EXTEND
LR-R = LEFT REAR JACK RETRACT
LF-E = LEFT FRONT JACK EXTEND
LF-R = LEFT FRONT JACK RETRACT
RF-E = RIGHT FRONT JACK EXTEND
RF-R = RIGHT FRONT JACK RETRACT
RR-R = RIGHT REAR JACK RETRACT
RR-E = RIGHT REAR JACK EXTEND
P.E.DP.E.D P.E.D P.E.D
B A B A B A B A
LR RETRACT RETRACT LF RF RETRACT RETRACT RR
6246 6247
P.E.DP.E.D P.E.D
EXTEND RF EXTEND LF EXTEND LR
TO HWH
GROUND
BOLT ON
PUMP
ABABAB
3500
2500
1500
4500
3400
1400
2400
4400
AB
P.E.D
RR EXTEND
TOP VIEW (TANK NOT SHOWN)
MOTOR
LR-R
LF-R
RF-R
RR-R RR-E
RF-E
LF-E
LR-E
8100
SYSTEM PRESSURE
SEE ELECTRICAL
CONNECTION
DIAGRAM - MASTER
AND PUMP RELAYS
RELAY
GROUND
GROUND
RELAY
NOTE: PUMP MANIFOLD ASSEMBLY
MAY BE PRE WIRED AT HWH.
TO TOUCH
PANEL
TO HWH
GROUND
BOLT ON
PUMP
CN3
SWITCH
CN1
CONTROL
BOX
GRAY
4-PIN
8-PIN
BLACK
8100
SYSTEM
PSW
8100
FROM CN3
LEVELING MANIFOLD CONNECTIONS

ELECTRICAL CONNECTION DIAGRAM
MP84.3503
21DEC09
2000 SERIES CAN SYSTEM FOR TRAILERS
FROM
BATTERY
TO PUMP
MOTOR
SWITCHED BATTERY
FROM MASTER RELAY
RELAY
GROUND
RELAY
GROUND
PUMP RELAY
CONTROL
8100
8500
6245
6245
6800
FUSE
40 AMP
RELAY (A)
(MASTER RELAY)
GROUND
BOLT ON PUMP
RELAY (B)
(PUMP RELAY)
TO 4 PIN
GRAY CONNECTOR
ON LEFT SIDE OF
CONTROL MODULE CONTROL MODULE
ON LEFT SIDE OF
TO CN1
CONTROL
MASTER RELAY
8600
SYSTEM
PRESSURE
SWITCH
6230
SEE ELECTRICAL
CONNECTION
DIAGRAM -
LEVELING
MANIFOLD
CONNECTIONS
E
FULL
RESERVOIR NOMINAL
CAPACITY 4.8 QUARTS
AP43063
R
SIDE VIEW
RELAY (B)
PUMP RELAY
RELAY (A)
MASTER RELAY
PUMP MOTOR
CONNECTION
MASTER AND PUMP RELAYS

ELECTRICAL CONNECTION DIAGRAM
MP84.4000
20APR09
625/2000 SERIES LEVELING SYSTEM
TOUCH PANEL CONNECTIONS
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
HWH COMPUTERIZED LEVELING
LEVEL
STORE
OFF
BRAKE
MODE
TRAVEL
CAUTION!
SLOPE
EXCESS
PARK/
NOT IN
LINK LIGHT
GROUND FROM CONTROL MODULE
CAN SHEILD
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 MODULE
6800RED
5

ELECTRICAL CONNECTION DIAGRAM
PAGE 1 OF 2
COLOR
WIRE
PIN # NUMBER
WIRE WIRE DESCRIPTION AND FUNCTION
CONTROL MODULE CONNECTION INFORMATION
KEY PIN
NO CONNECTION
GROUND FOR SENSING UNIT
+12 VOLTS FOR SENSING UNIT
NO CONNECTION
GROUND TO CONTROL MODULE WHEN LEFT SIDE IS LOW
GROUND TO CONTROL MODULE WHEN FRONT IS LOW
GROUND TO CONTROL MODULE WHEN RIGHT SIDE IS LOW
GROUND TO CONTROL MODULE WHEN REAR IS LOW
9 YELLOW
ORANGE
BLACK
12
11
10
WHITE
1
7
2 THRU 5
6
8
N/A
CN2 - 12 PIN BROWN CONNECTOR
28JUL08
MP84.4050
PIN 1
PIN 12
RED N/A
GREEN
CN3 - 12 PIN BLACK CONNECTOR
FRONT RIGHT SIDE
CN3 CN2 BLACK
PIN 12
PIN 1
PIN 1
PIN 12
FRONT
N/A
N/A
N/A
N/A
1 BLACK 1000 SWITCHED GROUND FROM LEFT FRONT WARNING SWITCH
SWITCHED GROUND FROM LEFT FRONT PRESSURE SWITCH
BLACK
2 1200 SWITCHED GROUND FROM RIGHT FRONT WARNING SWITCH
BLACK
3 2000 SWITCHED GROUND FROM RIGHT FRONT PRESSURE SWITCH
2200BLACK4 SWITCHED GROUND FROM 3000 PSI MANIFOLD PRESSURE SWITCH
BLACK
5 8100 GROUND FOR JACK WARNING SWITCHES AND PRESSURE SWITCHES
WHITE
6 6235 NO CONNECTION
7 & 8 SWITCHED GROUND FROM LEFT REAR WARNING SWITCH
BLACK
BLACK
BLACK
BLACK
12
11
10
9
SWITCHED GROUND FROM RIGHT REAR PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT REAR WARNING SWITCH
SWITCHED GROUND FROM LEFT REAR PRESSURE SWITCH
4000
3200
3000
4200
8 PIN BLACK CONNECTOR
RIGHT SIDE
NO CONNECTION
1 & 2
3 RED 6100 SWITCHED +12 BATTERY FROM OEM MASTER SWITCH
GROUND BY OEM FOR PROCESSOR BOARD
4 WHITE 6230
5 & 6 NO CONNECTION
120 OHM CAN BUS TERMINATING RESISTOR
7 & 8 BLACK N/A OR MODIFY - DO NOT REMOVE

ELECTRICAL CONNECTION DIAGRAM
PAGE 2 OF 2
COLOR
WIRE
PIN # NUMBER
WIRE WIRE DESCRIPTION AND FUNCTION
CONTROL MODULE CONNECTION INFORMATION
SWITCHED +12 FOR LEFT FRONT EXTEND SOLENOID VALVE
SWITCHED +12 FOR LEFT FRONT RETRACT SOLENOID VALVE
NO CONNECTION
9BLACK
11 & 12
10
1
7
6
8
CN1 - 12 PIN BROWN CONNECTOR
03DEC08
MP84.4051
LEFT SIDE
PIN 12
PIN 1
8600
PIN 4
PIN 1
CN1 PIN 1
PIN 8
3
4
5
2
BLACK 8500
BLACK 3500
BLACK 3400
BLACK 4500
BLACK 4400
BLACK 2500
BLACK 2400
BLACK 1500
BLACK 1400
SWITCHED +12 FOR RIGHT FRONT EXTEND SOLENOID VALVE
SWITCHED +12 FOR RIGHT FRONT RETRACT SOLENOID VALVE
SWITCHED +12 FOR LEFT REAR EXTEND SOLENOID VALVE
SWITCHED +12 FOR LEFT REAR RETRACT SOLENOID VALVE
SWITCHED +12 FOR RIGHT REAR EXTEND SOLENOID VALVE
SWITCHED +12 FOR RIGHT REAR RETRACT SOLENOID VALVE
SWITCHED +12 FOR MASTER RELAY CONTROL
SWITCHED +12 FOR PUMP RELAY CONTROL
4 PIN GRAY CONNECTOR
BLACKGRAY
+12 FROM SWITCHED SIDE OF MASTER RELAY FOR OUTPUT BOARD
1 BLACK 6800 +12 FROM SWITCHED SIDE OF MASTER RELAY FOR OUTPUT BOARD
2 BLACK 6800 GROUND FOR CONTROL MODULE OUTPUT BOARD
3 6230WHITE
4 WHITE 6230 GROUND FOR CONTROL MODULE OUTPUT BOARD
BROWN
8 PIN BLACK CONNECTOR
1 & 2 NO CONNECTION
+12 TO TOUCH PANEL
6800RED3 GROUND TO TOUCH PANEL
6230WHITE4
5CAN SHIELD WIRE
NO CONNECTION
6CAN LOW
N/AGREEN7 CAN HIGH
8 YELLOW N/A

MP84.5000
29JUL08
ELECTRICAL CONNECTION DIAGRAM
LED - FUSE LOCATION AND DESCRIPTION
OUTPUT BOARD
PAGE 1 OF 2
F5 F4 F3 F2
F1
F6
F7
F8
F9
F10
RED LED’S (CONTACTS)
FUSE
2
14
36
5
7
8
10
911
12
13
14 16
15 18
17 20
19
TOP RING BLACK
RELAY DESCRIPTIONLED FUSE BLACK
1-YELLOW F1-15 AMP2-RED PIN 1
4-YELLOW F2-15 AMP3-RED PIN 2
5-YELLOW F3-15 AMP6-RED PIN 3
8-YELLOW F4-15 AMP7-RED PIN 4
9-YELLOW F5-15 AMP10-RED PIN 5
F6-15 AMP11-RED PIN 6
12-YELLOW
14-YELLOW F7-15 AMP13-RED PIN 7
15-YELLOW F8-15 AMP PIN 816-RED
17-YELLOW F9-15 AMP18-RED PIN 9
20-RED F10-15 AMP PIN 10
19-YELLOW
LEFT FRONT EXT. - COIL
LEFT FRONT EXT. - CONTACT
LEFT FRONT RET. - CONTACT
LEFT FRONT RET. - COIL
IF A YELLOW LED IS LIT AND THE
INDICATES A POSSIBLE PROBLEM WITH
IF A YELLOW LED IS NOT LIT, THIS
4-PIN CONNECTOR.
PROBLEM WITH INPUT VOLTAGE FROM THE
NO RED LED IS COMING ON THERE MAY BE
IF THE YELLOW LEDS ARE WORKING BUT
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
VOLTAGE ON IT’S CORRESPONDING CN1 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
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS
SEE ELECTRICAL CONNECTION DIAGRAM -
INFORMATION - PAGE 2 OF 2.
CONTROL MODULE CONNECTION
OUTPUT BOARD
LEFT FRONT RET. FRONT RIGHT EXT. FRONT RIGHT RET. LEFT EXT. REAR RIGHT EXT. REAR RIGHT REAR RET. RELAY MASTER EXT. LEFT FRONT RET. LEFT REAR RELAY PUMP
YELLOW LED’S (COILS)
THE MODULE.
RIGHT FRONT RET. - COIL
RIGHT FRONT RET. - CONTACT
RIGHT FRONT EXT. - CONTACT
RIGHT FRONT EXT. - COIL
LEFT REAR RET. - COIL
LEFT REAR RET. - CONTACT
LEFT REAR EXT. - CONTACT
LEFT REAR EXT. - COIL
RIGHT REAR RET. - CONTACT
RIGHT REAR RET. - COIL
RIGHT REAR EXT. - COIL
RIGHT REAR EXT. - CONTACT
MASTER RELAY - COIL
MASTER RELAY - CONTACT
PUMP RELAY - COIL
PUMP RELAY - CONTACT