HWH 610 SERIES User manual

H
CORPORATION
H
W
R
HWH CORPORATION
2096 MOSCOW ROAD
MOSCOW, IOWA 52760
[phone] / [phone]
FEATURING:
TOUCH PANEL CONTROL
HYDRAULIC LEVELING
HWH COMPUTER-CONTROLLED
OPERATOR’S MANUAL
lON
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
CAUTION!
OFF
NOT IN
TRAVEL
EXCESS
SLOPE
PARK/
BRAKE
STORE
HWH COMPUTERIZED LEVELING
ML0989/MP05.5003/CH-K
21MAR01
KICK-DOWN JACKS
AP0989 - US
LEVEL
LEVELING SYSTEM
610 SERIES
INTERNET: http: //www.hwhcorp.com
AP10302 - Europe
UNDERSTANDING OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
(ON I-80, EXIT 267 SOUTH)

OPERATOR’S MANUAL
MP15.0
30MAY01
CAUTION !
READ THE ENTIRE OPERATOR’S MANUAL BEFORE OPERATING.
BLOCK FRAME AND TIRES SECURELY BEFORE CRAWLING UNDER VEHICLE. DO NOT USE LEVELING JACKS
OR AIR SUSPENSION TO SUPPORT VEHICLE WHILE UNDER VEHICLE OR CHANGING TIRES. VEHICLE MAY
DROP AND OR MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.
KEEP ALL PEOPLE CLEAR OF THE VEHICLE WHILE LEVELING SYSTEM AND ROOM EXTENSIONS ARE
BEING OPERATED.
KICK-DOWN JACKS MAY ABRUPTLY SWING UP WHEN THE FOOT OF THE JACK CLEARS THE GROUND
OR WHEN THE JACK REACHES FULL EXTENSION.
NEVER PLACE HANDS OR OTHER PARTS OF THE BODY NEAR HYDRAULIC LEAKS. OIL MAY PENETRATE
THE SKIN CAUSING INJURY OR DEATH.
WEAR SAFETY GLASSES WHEN INSPECTING OR SERVICING THE SYSTEM TO PROTECT EYES FROM DIRT,
METAL CHIPS, OIL LEAKS, ETC. FOLLOW ALL OTHER APPLICABLE SHOP SAFETY PRACTICES.
IF THE VEHICLE IS EQUIPPED WITH KICK-DOWN STYLE JACKS, DO NOT OVER EXTEND THE REAR JACKS.
IF THE WEIGHT OF THE VEHICLE IS REMOVED FROM ONE OR BOTH REAR WHEELS, THE VEHICLE MAY
ROLL FORWARD OR BACKWARD OFF OF THE JACKS.
NOTE: KEEP THE CONTROL VALVE LEVERS IN THE STORE POSITION WHEN JACKS ARE NOT IN USE.
IMPORTANT: IF VEHICLE IS EQUIPPED WITH A ROOM EXTENSION, READ ROOM EXTENSION SECTION
BEFORE OPERATING LEVELING SYSTEM.
HOW TO OBTAIN WARRANTY SERVICE
THIS IS NOT TO BE INTERPRETED AS A STATEMENT OF WARRANTY
HWH CORPORATION strives to maintain the highest level of
customer satisfaction. Therefore, if you discover a defect or
problem, please do the following:
[phone] OR [phone]. Give your name and
coach was purchased, or the date of system installation,
Notify the dealership where you purchased the
vehicle or had the leveling system installed. Dealership
management people are in the best position to resolve
the problem quickly. If the dealer has difficulty solving
the problem, he should immediately contact the Customer
Service Department, at HWH CORPORATION.
If your dealer cannot or will not solve the problem,
notify the Customer Service Department:
HWH CORPORATION 2096 Moscow Rd. Moscow IA. 52760
address, coach manufacturer and model year, date the
SECOND:
FIRST:
authorization of an independent service facility, to be
defective part, either by appointment at the factory or by the
CORPORATION will authorize repair or replacement of the
determine whether or not your claim is valid. If it is, HWH
HWH CORPORATION personnel will contact you to
during business hours (8:00 a.m. till 5:00 p.m. c.s.t.).
description of the problem, and where you can be reached
determined by HWH CORPORATION. All warranty repairs
must be performed by an independent service facility
authorized by HWH CORPORATION, or at the
HWH CORPORATION factory, unless prior written approval
has been obtained from proper HWH CORPORATION
personnel.

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

OPERATING PROCEDURES
MP35.5063
24APR97
GENERAL INSTRUCTIONS
PREPARATION FOR TRAVEL
If parking on soft ground ar 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 "LOW BATTERY" indicator is on, the system should be
If the hand/auto brake is not set when the "HYD" button is
pressed, the "NOT IN PARK/BRAKE" light will come on and
the system will not operate.
checked. Battery voltage should be checked, also all connections
should be checked.
Before traveling, the red jack warning lights must be off and
the "TRAVEL" 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" light is not 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 MAN-
UAL JACK RETRACTION Section. The system should then
be checked.
The leveling system should be cycled once a month or when-
ever the vehicle is used, to keep the system in operating
condition.
Park with the front of the vehicle facing down hill if possible.
Care must be taken not to raise the rear of the vehicle too high
or the vehicle may roll forward or backward off the jacks.
ROOM EXTENSION PROCEDURES
room extensions are extended.
retracted. NEVER operate the leveling system when any
NOT retract the leveling system until all room extensions are
If the vehicle is equipped with a room extension
until the leveling and stabilizing procedure is complete. Do
be blocked securely. Do NOT operate any room extension
If the vehicle is equipped with kick-down jacks, the wheels MUST
read this section carefully.
IMPORTANT:
vehicle is supported by the leveling system.
Do not use a room extension support when the
Refer to the vehicle owner’s manual for proper operation of
IMPORTANT:
room extensions.
BEFORE MOVING THE VEHICLE.
THAT ALL JACKS ARE IN THE STORE/TRAVEL POSITION
LIGHTS. IT IS THE OPERATOR’S RESPONSIBILITY TO CHECK
CAUTION: DO NOT RELY SOLELY UPON THE WARNING

OPERATING PROCEDURES
MP35.5065
01JUL05
AUTOMATIC HYDRAULIC LEVELING
CAUTION:
IMPORTANT:
1.Place transmission in the recommended position for
to the "ACCESSORY" or "ON" position.
2. Press the "I" button to enter the hydraulic operation mode.
The hydraulic indicator light will glow steady.
4. Press the "I" button a third time. The hydraulic indicator
EXCESS SLOPE SITUATION: In the event the jacks are
unable to level the coach, the "EXCESS SLOPE" indicator
light will come on. The pump will shut off. One or two
yellow leveling indicator lights will remain on. The "HYD"
indicator light will continue to blink for 2 minutes, then the
system will shut off. The system will NOT stabilize the
vehicle if the "EXCESS SLOPE" light comes on. Store
the jacks according to the JACK RETRACTION Section.
Move the vehicle to a more level position or level the
vehicle as close as possible according to the MANUAL
5. Turn the ignition switch to the "OFF" position.
JACK RETRACTION
THE OPERATOR MUST BE SURE THAT
THERE ARE NO OBJECTS UNDER THE VEHICLE AND
THAT ALL PEOPLE ARE CLEAR OF THE VEHICLE.
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.
4. If jacks cannot be retracted by the above procedure see
MANUAL JACK RETRACTION Section.
The system must be allowed to completely finish the
2. Press the "STORE" button. The store indicator light will
flash. As each jack retracts, its red WARNING light will go
parking vehicle and set parking brake. Turn the ignition
light will start to flash. The system will automatically extend
the jacks to level the vehicle and then extend any
remaining jacks until they touch the ground. After the
system has finished leveling and stabilizing, it will
1. Turn the ignition switch to "ON", "ACC", or start the engine.
Press the "I" button one time. The "I" indicator light will glow
steady.
out. The vehicle can be moved as soon as the red WARNING
lights are out and the green "TRAVEL" light is on, providing
the jacks are in the STORE/TRAVEL position.
store mode. If the engine was started before putting
the system in the store mode, the vehicle may be
moved when the jacks are in the STORE/TRAVEL
3. 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 (30) minutes, then shut down regardless of
the "WARNING" lights condition.
3. Press the "I" button a second time. The hydraulic indicator
light will start to flash. One at a time the jacks will swing to the
vertical position. The red WARNING light for each jack will
come on as its respective jack becomes vertical. 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.
JACK POSITIONS
ARE IN THE STORE/TRAVEL POSITION BEFORE
RESPONSIBILITY TO CHECK THAT ALL JACKS
THE WARNING LIGHTS. IT IS THE OPERATOR’S
CAUTION: DO NOT RELY SOLELY UPON
EXTEND POSITION STORE/TRAVEL POSITION
automatically shut off.
HYDRAULIC OPERATION Section.
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
This will not interrupt the store procedure.
MOVING THE VEHICLE.

OPERATING PROCEDURES
MP35.5067
29APR97
CAUTION:
IMPORTANT:
MANUAL JACK RETRACTION
MANUAL HYDRAULIC OPERATION
1. Place transmission in the recommended position for parking
2. Press the "I" button. The indicator light will glow steady.
4. The vehicle may be leveled using the manual EXTEND buttons
on the right half of the panel. If a yellow LEVEL SENSING
light is on, that side or end of the vehicle is low. Jacks will ex-
tend (or retract) in pairs to raise (or lower) a side or end of the
vehicle. Any jack not used for leveling can be extended to the
ground. This provides additional stability against wind and
Do not continue to push an EXTEND button
for more than ten (10) seconds after that pair of jacks are fully
5. When leveling is completed, push the "OFF" button on the
leveling panel and turn the ignition switch to the "OFF" position.
KEEP AWAY FROM THE WHEELS, DO
NOT CRAWL UNDER THE VEHICLE, KEEP A SAFE DISTANCE
IN FRONT AND REAR OF VEHICLE. THE VEHICLE MAY
DROP AND/OR MOVE FORWARD OR BACKWARD WITH-
OUT WARNING AS THE VALVE RELEASE IS OPERATED.
if the "STORE" button on the control panel will not retract the
jacks for travel.
1. Locate the 4 valve release "T" handles on the solenoid valves.
The solenoid valves are located on the pump/valve assembly.
2. Allow clearance for vehicle to lower.
3. Retract the rear jacks by opening the two outer valves. Slowly
turn the "T" handles counter clockwise. The handles may turn
easily at first but as an internal spring is compressed, turning
may become more difficult. The valves need only to be opened
enough to retract the jack.
4. Retract the front jacks by opening the two center valves as
described in Step 3.
5. Check that all four jacks are now retracted.
6. Close the valves by turning the release handles clockwise.
Once the internal spring tension has been released, the handles
will turn free for several turns. Once the "T" handles are snug,
DO NOT tighten the handles past this point as internal damage
may occur to the solenoid.
7. The system should now be repaired before using again.
activity in the vehicle.
the vehicle, and set the parking brake. Turn the ignition to the
"ACCESSORY" or "ON" position.
3. Press the "I" button a second time. The hydraulic indicator
light will start to flash. One at a time, the jacks will swing to
the vertical portion. The four red WARNING lights will be on.
Place pads under the jack feet if the ground will not support
the vehicle on the jacks.
extended.
NOTE: Use the valve release "T" handles for retracting only

There are two basic adjustments which are made at the time
of installation. However, when adjustment of a leveling unit
is needed, the following procedures are recommended.
Always make vertical adjustment first. If
the vertical adjustment is changed at anytime, be sure to check
the horizontal adjustment. Vertical position is changed by adjusting
Horizontal stop is adjusted by turning the set screws located
just inside the cable locknuts. The jack can be adjusted down
to provide clearance for objects which may interfere with the
operation of the jacks. The horizontal stop must be adjusted
to provide clearance between the hat bracket and mounting
bolts; and the actuator and hose fittings, when the jack is in
the STORE POSITION. The jack must be able to fully extend
in the horizontal position without interfering with suspension com-
Each jack should be checked to be sure
that it is vertical when it swings down. To do this, retract all
jacks, then extend each jack until it is close to, but not touching
the ground. If the jack stopped short of being vertical, it can
be adjusted by loosening the lower adjusting nut and tightening
the upper nut.
The horizontal stop can be adjusted up or down in the slot to
provide clearance for objects which may interfere with operation
If the jack stopped short of being vert-
ical loosen the set screw and turn the adjusting cap clockwise.
If the jack went beyond vertical, loosen the set screw and turn
the adjusting cap counterclockwise. After each adjustment,
the weight of the vehicle must be applied to the jack to make
the adjustment effective. DO NOT adjust cap more than one
turn without cycling the jack.
The horizontal stop on the heavy-duty jack is adjusted by adding
washers under the urethane stop.
MP45.0
13FEB03
MAINTENANCE
SYSTEM ADJUSTMENT
JACK ADJUSTMENT
ADJUSTING
UPPER
STANDARD &
LOW PROFILE
UNITS 9,000 lb. JACKS
ADJUSTING
LOWER
NUT NUT
STOP LEVELING
HEAVY DUTY
UNITS
16,000 lb. JACKS
ADJUSTING
SET SCREW
CAP
ADJUSTING
HORIZONTAL
ADJUSTMENT
VERTICAL
ADJUSTMENT
LOCK NUTS,
SET SCREW,
6,000 lb. JACKS
ponents, tanks, etc.
NOTE: The two front jacks should be adjusted to the same
horizontal position.
1. 6,000 lb. JACKS:
2. 9,000 lb. JACKS:
3. 16,000 lb. JACKS:
the lock nuts on the actuator cable. If the jack stopped short
of vertical, tighten the lock nuts. If the jack goes past vertical,
back the lock nuts off. Be sure to adjust each nut the same
number of turns.
of the jack. The stop must be adjusted so that the jack can be
fully extended in the horizontal position without interfering with
suspension components, tanks, etc.
LEVEL SENSING UNIT ADJUSTMENT
Level the vehicle by placing a circular bubble level in the
center of the freezer floor or location within the vehicle that
is to be level. With the vehicle level, adjust the sensing unit
until all yellow lights are off. This is done by drawing up the
corresponding screw if the sensing unit is mounted below
the surface as shown or backing out the corresponding
screw if the sensing unit is mounted above the surface.
Bump the sensing unit to see that it is settled tight against
all three screw heads and still indicates that the unit is level.
BELOW THE SURFACE MOUNTING
ELECTRONIC LEVEL SENSING UNIT
MOUNTING SURFACE
SIDE
FRONT THIS
UP
SPRINGS (3)
SCREWS (3)

MP45.08
29JAN01
MAINTENANCE
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
with rebuilt parts or can be sent to HWH CORPORATION to
be rebuilt, when the system is out of warranty.
UNUSUAL CONDITIONS
Do not move the vehicle while the leveling jacks are still in
OIL LEVEL
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.
OPERATIONAL CHECK
Review the operator manual and run the system in the
automatic and manual mode. Note any abnormal
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.
+ or - 1 inch side to side, and + or - 5.4 inches front to rear
on a 36 foot vehicle.
If the red LOW BATTERY indicator light comes on, the
electrical system should be checked. If the light comes on,
can cause erratic operation or damage components.
Contact your dealer or HWH CORPORATION for assistance.
Review the JACK RETRACTION Section.
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.
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.
It is important that the four leveling jacks and any room
extensions 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
NOTE: All major components of the system can be replaced
NOTE: The level sensing unit has an accuracy tolerance of
should be approximately on inch below the top of the
reservoir when adequately filled.
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:
improper operation.
operation.
the operation of the system is not interrupted, but low voltage

MAINTENANCE
MP45.10
15MAY97
9,000 lb. JACK 16,000 lb. JACK
ROLLER
ASSEMBLY
"NOT IN PARK/BRAKE" CHECK
CAUTION:
ROLLER ASSEMBLY LOCATIONS
WHEN MAKING THIS CHECK, BLOCK
THE VEHICLES WHEELS SECURELY SO THE VEHICLE
CAN NOT ROLL FORWARD OR BACKWARD.
Set the park/brake. Switch the ignition to "ACCESSORY" or
"ON" position. Press the "HYD" button one time. Release
the parking brake and confirm that the "NOT IN PARK/BRAKE"
indicator light comes on. Reset the parking brake. The "NOT IN
PARK/BRAKE" indicator light should go out. Switch the ig-
nition to "OFF".
NOTE:
If any of the above checks or inspections reveal a prob-
lem or if there are other problems or questions, consult a qual-
ified RV repair center, your vehicle or coach manufacturer, or
HWH CORPORATION for service or repair.
On the 9,000 lb. jacks and the 16,000 lb. jacks there are roller
assemblies that need to rotate freely. These rollers should be
cleaned with a penetrating fluid, such as WD-40, and lubricat-
ed with a light oil as part of your regular maintenance schedule.
ROLLER ASSEMBLY

FRONT
"T" HANDLES
VALVE RELEASE
PUMP/MANIFOLD
ASSEMBLY
NOTE: BEFORE OPERATING VALVE RELEASE
"T" HANDLES, READ AND UNDERSTAND
PROCEDURE FOR MANUAL JACK RETRACTION
IN OPERATOR’S INSTRUCTIONS.
HYDRAULIC LINE CONNECTION DIAGRAM
LEVELING SYSTEM
RF
RR
LF
LR
SHUTTLE
VALVE
MANIFOLD FITTING
MP65.0
18JUN01
VELOCITY VALVE
CHECK VALVE CAPS (4)
NOTE: SOME MANIFOLDS ARE
EQUIPPED WITH VELOCITY VALVES