HWH 310 SERIES User manual

OPERATOR’S MANUAL
ML10043/MP05.3005/LH-S
28AUG02
Touch Panel Control
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
310 SERIES LEVELING SYSTEM
HWH TOUCH PANEL-CONTROLLED
Straight-Acting Jacks
AP10043 - U.S.
AP10301 - Europe
W
CORPORATION
HH
R
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
HWH HYDRAULIC LEVELING
OFF
STORE
ON
CAUTION!
BRAKE
PARK/
NOT IN

CAUTION !
READ THE ENTIRE OPERATOR’S MANUAL BEFORE OPERATING.
MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.
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 PENATRATE SKIN
WEAR SAFETY GLASSES WHEN INSPECTING OR SERVICING THE SYSTEM TO PROTECT EYES FROM DIRT, METAL
MP15.04
30MAY01
KEEP ALL PEOPLE CLEAR OF VEHICLE WHILE LEVELING SYSTEM AND ROOM EXTENSION ARE BEING OPERATED.
IMPORTANT: IF COACH IS EQUIPPED WITH A ROOM EXTENSION, READ ROOM EXTENSION SECTION BEFORE
OPERATING LEVELING SYSTEM.
HOW TO OBTAIN WARRANTY SERVICE
THIS IS NOT TO BE INTERPRETED AS A STATEMENT OF WARRANTY
HWH CORPORATION strives to maintain the highest level of
customer satisfaction. Therefore, if you discover a defect or
problem, please do the following:
[phone] OR [phone]. Give your name and
coach was purchased, or the date of system installation,
Notify the dealership where you purchased the
vehicle or had the leveling system installed. Dealership
management people are in the best position to resolve
the problem quickly. If the dealer has difficulty solving
the problem, he should immediately contact the Customer
Service Department, at HWH CORPORATION.
If your dealer cannot or will not solve the problem,
notify the Customer Service Department:
HWH CORPORATION 2096 Moscow Rd. Moscow IA. 52760
address, coach manufacturer and model year, date the
SECOND:
FIRST:
authorization of an independent service facility, to be
defective part, either by appointment at the factory or by the
CORPORATION will authorize repair or replacement of the
determine whether or not your claim is valid. If it is, HWH
HWH CORPORATION personnel will contact you to
during business hours (8:00 a.m. till 5:00 p.m. c.s.t.).
description of the problem, and where you can be reached
determined by HWH CORPORATION. All warranty repairs
must be performed by an independent service facility
authorized by HWH CORPORATION, or at the
HWH CORPORATION factory, unless prior written approval
has been obtained from proper HWH CORPORATION
personnel.

CONTROL FUNCTIONS
leveling system.
CONTROL IDENTIFICATION
POWER ON LIGHT WARNING LIGHTS
(4-Red)
LEVELING LIGHTS
(4-Yellow)
CONTROL BUTTONS INDICATOR LIGHTS
CAUTION!
ON
STORE
OFF
HWH HYDRAULIC LEVELING
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
FRONT EXTEND BUTTON
FRONT RETRACT BUTTON
RIGHT SIDE RETRACT BUTTON
RIGHT SIDE EXTEND BUTTON
the same time.
extend their respective jack pairs to lift the vehicle.
MP25.3040
29MAY01
PARK/
NOT IN
BRAKE
"NOT IN PARK/BRAKE" LIGHT
LEFT SIDE EXTEND
REAR EXTEND BUTTON
REAR RETRACT BUTTON
LEFT SIDE RETRACT
when the panel is on, but the hand/auto park brake is not set.
POWER ON LIGHT:
"NOT IN PARK/BRAKE" LIGHT:
LEVELING LIGHTS:
WARNING LIGHTS:
"ON" BUTTON :
"OFF" BUTTON :
"STORE" BUTTON :
EXTEND BUTTONS (UP ARROWS) :
RETRACT BUTTONS (DOWN ARROWS) :
These buttons will
This light indicates the system is on.
STORE LIGHT
STORE LIGHT:
the store mode.
WARNING BUZZER:
BUTTON
"ON" BUTTON
"OFF" BUTTON
"STORE" BUTTON
BUTTON
This is the "ON" button for the leveling
system. It provides control power to operate the electrical
relay on the pump, the LEVELING lights and the 4 red
WARNING lights.
This button turns off control power to the
This button will retract all four jacks at
will retract their respective jack pairs to lower the vehicle.
If a yellow LEVELING light is on, that
indicates a side, corner, or end of the vehicle is low. Extend
the appropriate jack pairs to put out the yellow light. Only
extended 1 to 2 inches or more and the ignition switch
one yellow LEVELING light can be on at a time. The vehicle
is level when all yellow lights are out.
A red WARNING light will be on when-
ever the corresponding jack is extended approximately
1 to 2 inches, provided the ignition is in the "ACC" or "ON"
position and the system is on. Some vehicles are equipped
with a dash mounted master "JACKS DOWN" light which will
be on when one or more jacks are extended approximately
This light will be on when the system is in
A buzzer will sound if a jack is
These buttons
This indicator light is on
1 to 2 inches.
is in the "ON" position.

OPERATING PROCEDURES
LEVELING PROCEDURE
2. Place the ignition switch in the "ACC." position.
month or whenever the vehicle is used, to keep the
system in operating condition.
SITE SELECTION
1. Place gear selector in the parking position, apply park
5. After the vehicle is level, the jacks not used for leveling
may be extended until they are firmly on the ground. This
provides additional stability against wind and activity in the
"NOT IN PARK/BRAKE" light will come on when the
ROOM EXTENSION PROCEDURES
extension read this section carefully.
If the vehicle is equipped with a roomIMPORTANT: Refer to the vehicle owner’s manual for proper operation of
room extensions.
IMPORTANT: Do not use a room extension support
when the vehicle is supported by the leveling system.
brake and block tires securely.
"ON" button is pushed. The panel will turn on, but the
3. Push the "ON" button on the touch panel.
The POWER ON light will be lit. Place pads under vehicle. Do this by pushing the front and/or rear EXTEND
buttons as needed to extend any remaining jacks. Jacks
6. Push the "OFF" button on the touch panel.
7. Turn the ignition switch off.
NOTE: The leveling system should be cycled once a
NOTE: If the hand/auto park brake is not set, the
the jacks, if necessary, at this time.
Park with the front of the vehicle facing downhill 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. If parking on soft ground or asphalt paving, wood
blocks or pads should be placed under the jacks.
If the vehicle is equipped with kick down jacks, the wheels
MUST be blocked securely. It is recommended the vehicle
system will not operate.
extended to stabilize the vehicle should lift the vehicle at
least 3/4 inch. Do not use the right or left EXTEND buttons.4. A lit yellow LEVEL light indicates that the end, side, or
corner is low. If a yellow light is lit, push the EXTEND (up
arrow) button for that yellow light to extend the appropriate
pair of jacks. Continue pushing the button until the yellow
light goes out. ALWAYS LEVEL THE VEHICLE FROM SIDE
TO SIDE, IF NEEDED, BEFORE LEVELING THE VEHICLE
FROM FRONT TO REAR.
Only one yellow LEVEL light can be on at one time. If a
side yellow light is on, a front or rear yellow light cannot
come on. Extend jack pairs accordingly until all yellow
lights are out. It may take several movements from side to
front or side to rear to raise a low corner. If the ground is
too uneven, the jack may not have enough stroke to level
the vehicle. The vehicle may have to be moved.
26SEP03
MP35.5958
is leveled and stabilized before operating any room extension.
It is recommended any room extension is retracted before
retracting the leveling system. It is not recommended to
operate the leveling system when any room extension is
extended.
MP35.65

OPERATING PROCEDURES
MP35.5968
01JUL05
CAUTION:
RETRACT PROCEDURES
THE OPERATOR MUST BE SURE THAT
THERE ARE NO OBJECTS UNDER THE VEHICLE AND
THAT ALL PEOPLE ARE CLEAR OF THE VEHICLE.
3. The system will automatically shut down approximately two
minutes after the four individual red WARNING lights are out.
out the system will continue to store. Push the "OFF"
button and have the system serviced.
If jacks cannot be retracted by the above
procedure see MANUAL JACK RETRACTION Section.
1. Turn the ignition switch "ON" and press the "ON" button
one time. The ON indicator light will glow steady.
2. Press the "STORE" button. As each jack retracts, its red
WARNING light will go out. The vehicle can be moved as
soon as the red WARNING lights are out, provided the jacks
are in the STORE/TRAVEL position. (See FIGURE 1)
NOTE:
4. Turn the ignition switch to the "OFF" position or
IMPORTANT: If any one red WARNING light does not go
CAUTION:DO NOT MOVE THE VEHICLE WHILE
THE LEVELING JACKS ARE STILL IN CONTACT WITH
THE GROUND OR IN THE EXTEND POSITION. THIS
VEHICLE IS EQUIPPED WITH STRAIGHT ACTING JACKS.
MOVING THE VEHICLE WITH THE LEVELING JACKS
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
IMPORTANT: DO NOT interrupt power to the leveling
system while it is in the STORE mode. DO NOT push
must be allowed to completely finish the STORE mode.
If the engine was started before putting the system in the
are in the "STORE" position. This will not interrupt the
STORE mode, the vehicle may be moved when the jacks
EXTENDED CAN CAUSE SEVERE DAMAGE TO THE
STORE/TRAVEL POSITION
FIGURE 1
EXTENDED POSITION
the "OFF" button or turn the ignition key. The system
store procedure.
NOTE: The park brake does not have to be set to put the
system in the "STORE" mode.
INTO THE STORE/TRAVEL POSITION.
proceed to travel.
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

OPERATING PROCEDURES
MANUAL JACK RETRACTION
4. Repeat the process for the rear jacks by opening the two
outer valves.
4 and 1/2 turns. Turning the nuts more could damage
the jacks. DO NOT turn valve release nuts more than
IMPORTANT: Only open the valves enough to retract
until the jacks start to retract.
Slowly turn the manual valve releases counter clockwise
3. Retract the front jacks by opening the two center valves.
2. Allow clearance for the vehicle to lower.
The solenoid valves are located on the power unit/valve
1. Locate the manual valve release on each solenoid valve.
RELEASE IS OPERATED.
OR BACKWARD WITHOUT WARNING AS THE VALVE
THE VEHICLE MAY DROP AND/OR MOVE FORWARD
DISTANCE IN FRONT AND REAR OF THE VEHICLE.
DO NOT CRAWL UNDER THE VEHICLE, KEEP A SAFE
the valves.
assembly.
CAUTION:KEEP AWAY FROM THE WHEELS,
7. The system should now be repaired before using again.
IMPORTANT: Once the manual valve release is snug,
DO NOT tighten the manaual valve release past this
6. Close the valves by turning the manual valve releases
5. Check that all four jacks are now retracted.
Cap. See the back page of this manual for further info.
1/4" Nut Driver has been incorporated into the Breather
NOTE: Prior to APRIL 2002 a 1/4" Nut Driver was sent
with the Operators Manual. As of APRIL 2002 the
point as internal damage may occur to the solenoid.
clockwise.
POWER UNIT
VALVE
ASSEMBLY
MP35.601G
02OCT03
NOTE: Some assemblies have 4 large valves, some have
4 small valves and some will have 2 large valves in the
outer positions and 2 small valves in the center positions.
Valve relese T-Handles will turn several turns easily.
As the valve starts to open, the T-Handles will turn
harder. Make sure the valves have been opened far
enough to allow the jacks to retract.
SOLENOID VALVES VALVE RELEASE
T-HANDLE
RELEASE
VALVE
NUT
BREATHER CAP

MAINTENANCE
MP45.050H
18FEB03
OIL LEVEL
The oil level should be checked when the vehicle is first
purchased and then once every two years. More often if
there is an oil leak in the system.
NOTE: Overfilling the tank can cause leakage of oil
through the breather cap.
ELECTRICAL SYSTEM
The batteries should be in good condition and fully charged.
Weak batteries can cause erratic operation. Battery cable
terminals and battery posts and connections should be kept
All electrical connections, especially ground connections,
should be clean, tight, free from corrosion and protected
LEVELING JACKS
There are very few user serviceable parts on the leveling
jacks. The jacks require very little maintenance. If the jacks
VISUAL INSPECTION
Periodically inspect the leveling system for oil leaks and
damaged or missing parts, such as pivot bolts or springs.
Check the hydraulic lines and wiring for damage and wear.
Check that the jacks do not interfere with any parts of the
vehicle when they are in the "STORE" position.
The jacks should be cycled at least once a month or
whenever the coach is serviced. The system will operate
better if kept clean and free from caked on mud or ice.
OPERATIONAL CHECK
Check that all lights work according to the "INDICATOR
LIGHT" Section. Correct function of the red "WARNING"
Review the OPERATOR MANUAL. Run the system
according to the SYSTEM OPERATION (LEVELING) Section.
Note any abnormal operation.
Review the "JACK RETRACTION" Section. Make sure the
jacks will fully retract to the "STORE" position. Jacks should
not interfere with any of the coach when in the "STORE"
All maintenance should be done as part of the normal
servicing of the coach.
clean. from weathering.
light is important.
position.
FLUID: HWH Specialty Hydraulic Oil is recommended. In an
brake fluid or hydraulic jack fluid. Use of these can damage
and can cause staining should a leak occur. DO NOT USE
Dexron automatic transmission fluid contains red dye
emergency Dexron automatic transmission fluid can be used.
seals.
NOTE:
are extremely dirty with caked on mud they should be washed.
The jack rods should NOT be wiped and do not need to
be oiled or sprayed with anything. See maintenance,
All four jacks should be completely retracted before checking
the oil level. The oil reservoir is part of the pump/manifold
assembly. The oil level is checked and filled through the
breather cap. Clear any dirt away from the breather/filler cap
before removing. The oil level should be within one inch of
the top of the reservoir. Most breather caps have a dipstick.
SYSTEM ADJUSTMENT.

MAINTENANCE
MP45.0918
29SEP03
CAUTION:
CANNOT ROLL FORWARD OR BACKWARD.
THE COACH WHEELS SECURELY SO THE COACH
light should go out. Switch the ignition to "OFF".
comes on. Reset the parking brake. The "PARK" indicator
the parking brake and confirm that the "PARK" indicator light
position. Push the "ON/OFF" switch toward "ON". Release
Set the park/brake. Switch the ignition to the "ACC" or "ON" manufacturer, or HWH CORPORATION for service or repair.
qualified RV repair center, your vehicle or coach
or if there are other problems or questions, consult a
If any of the above checks or inspections reveal a problemWHEN MAKING THIS CHECK, BLOCK
NOT IN PARK/BRAKE CHECK
LEVEL SENSING UNIT ADJUSTMENT
all three screw heads and still indicates that the unit is level.
Bump the sensing unit to see that it is settled tight against
screw if the sensing unit is mounted above the surface.
the surface as shown or backing out the corresponding
corresponding screw if the sensing unit is mounted below
until all yellow lights are off. This is done by drawing up the
is to be level. With the vehicle level, adjust the sensing unit
center of the freezer floor or location within the vehicle that
Level the vehicle by placing a circular bubble level in the
MOUNTING SURFACE
ELECTRONIC LEVEL SENSING UNIT
BELOW THE SURFACE MOUNTING
FRONT
SIDE
THIS
UP
SCREWS (3)
SPRINGS (3)
SURFACE
MOUNTING
BELOW THE SURFACE MOUNTING
LEVEL SENSING UNIT
SPRINGS (3)
SCREWS (3)
REAR
THIS
SIDE
STICKER
ON TOP
UP

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

12 VOLT D.C.
HYDRAULIC
POWER UNIT
M
RELIEF VALVE
RETURN PRESSURE
SOLENOID MANIFOLD
ASSEMBLY
CHECK
VALVE
INNER
CHECK
VALVE
OUTER
SOL.VALVE
LR SOL.VALVE SOL.VALVE SOL.VALVE
RF RRLF
PRESSURE/RETURN
SHUTTLE VALVE 50 PSI
SWITCH
JACK
CYLINDER
LEFT REAR RIGHT REAR
RIGHT
FRONT
LEFT
FRONT
HYDRAULIC SCHEMATIC
305/310/325 SERIES LEVELING SYSTEM
WITH STRAIGHT-ACTING JACKS
07MAR03
MP65.3005

MP85.3003
ELECTRICAL CONNECTION DIAGRAM
MAKE ALL GROUNDING
CONNECTIONS BEFORE
APPLYING POWER
TO BOX.
28JUL03
A
B
BAB
A
TOUCH
PANEL
SEE CONTROL BOX
ELECTRICAL
WARNING SWITCH
HARNESS
RF
LR RR
310 LEVELING SYSTEM
CONNECTION
TO JACK
WARNING
SWITCH
TO JACK
WARNING
SWITCH
HYDRAULIC MANIFOLD
ELECTRICAL CONNECTION
DIAGRAM
CONNECTION DIAGRAM
GROUNDING ELECTRICAL
PUMP RELAY ELECTRICAL
CONNECTION DIAGRAM
A
B
LF
SEE TOUCH PANEL
CONNECTION
DIAGRAM
SWITCH
WARNING
TO JACK
TOUCH PANEL
CABLE ASSEMBLY
TO PARK
BRAKE LIGHT
ON DASH
(LABELED) -
9001
TO PARK
BRAKE
SWITCH
(LABELED) -
9000
FROM +12 ACC.
FUSED 15AMP MAX -
(BROWN) 6120
(BLUE)
9000
(WHITE)
6235
(YELLOW)
1000
(GREEN)
4000
(WHITE)
6235 (BLACK)
3000
(WHITE)
6235
(RED)
2000
(WHITE)
6235
#10 WIRE TO GROUND STUD - (WHITE) 6230
NOTE: THE (4) DIGIT WIRE NUMBER
SUPERSEDES ANY AND ALL WIRE COLORS.
ELECTRONIC
SENSING UNIT
FRONT
UP
SIDE
THIS
HARNESS
MANIFOLD
HYDRAULIC
WARNING LIGHT
MASTER
DIAGRAM
CONNECTION
SEE ELECTRICAL
+12 - (PURPLE) 6121
CONTROL -
(BROWN) 7699

AWAY FROM THE PANEL WHEN PLUGGED IN.
ALL WIRE CONNECTIONS WILL POINT
CONNECTION DIAGRAM
310/325 SERIES LEVELING SYSTEM TOUCH PANEL
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
HWH HYDRAULIC LEVELING
CAUTION!
MASTER
WARNING
INDICATOR
PIGTAIL
7- +12 - (PURPLE) 6121
8- CONTROL - (BROWN) 7699
6- BLANK
9- BLANK
NOTE:
(TO CONTROL BOX)
2-FUSED ACCESSORY
(TO CONTROL BOX)
3-SWITCHED ACCESSORY
4-FUSED ACCESSORY
5-STORE RETURN
6-PARK BRAKE
7-GROUND
STORE BRAKE
NOT IN
PARK/
OFF
ON
ANY AND ALL WIRE COLORS.
NUMBER SUPERSEDES
THE (4) DIGIT WIRE
CABLE CONNECTIONS
WHITE-COMMON-5
YELLOW-LEFT SIDE-4
GREEN-RIGHT SIDE-2
4-LEFT FRONT - (YELLOW) 1000
5-COMMON - (WHITE) 6235
NOTE:
1-LEFT REAR - (GREEN) 4000
2-RIGHT REAR - (BLACK) 3000
3-RIGHT FRONT - (RED) 2000
TOUCH PANEL
BLACK-FRONT-3
RED-REAR-1
WARNING
SWITCH
INPUTS
UNIT
LEVEL
SENSING
INPUTS
RIGHT FRONT-15
KEY N.C.-14
RIGHT REAR-13
LEFT REAR-12
LEFT FRONT-11
PUMP-10
STORE-9
1-JACK DOWN
WARNING
SENSOR
MP85.3007
12MAY03

CONNECTION DIAGRAM
MP85.301N
29SEP03
310/325 SERIES LEVELING SYSTEM
ELECTRICAL SENSING UNIT
FRONT
UP
SIDE
THIS
SEE MASTER LIGHT/BUZZER
CONNECTION DIAGRAM
7699
6121
6100

5 AMP
10 AMP
10 AMP
10 AMP
5 AMP
RIGHT FRONT FUSE
RIGHT REAR FUSE
PART NUMBER AND
10 AMP
LEFT FRONT FUSE
TOUCH PANEL
CABLE INPUT ROOM EXTENSION
PUMP CONTROL
(ONLY USED
ROOM EXTENSION)
15 PIN
CONNECTION
LABEL
TOUCH PANEL CABLE
SLIDE OUT
SWITCH
AND SERIAL NUMBER
WITH HWH
6-PARK BRAKE
7-GROUND
8-NO CONNECTION
9-STORE
10-PUMP
11-LEFT FRONT
12-LEFT REAR
13-RIGHT REAR
14-BLANK
15-RIGHT FRONT
5 - STORE RETURN
4 - FUSED ACCESSORY
(TO TOUCH PANEL)
3 - SWITCHED ACCESSORY
(FROM TOUCH PANEL)
2 - FUSED ACCESSORY
(FROM TOUCH PANEL)
ELECTRICAL CONNECTION DIAGRAM
CONTROL BOX
310/325 SERIES LEVELING SYSTEM
PUMP FUSE
JACK INTERRUPT FOR ROOM EXTENSION
(IF NEEDED)
1 - JACK DOWN
WARNING SWITCH
LEFT REAR
SOLENOID VALVE -
(BROWN) 4400
RIGHT FRONT
SOLENOID VALVE -
(GREEN) 2400
LEFT FRONT
SOLENOID VALVE -
(BLUE) 1400
LEFT REAR FUSE
PUMP - (GRAY) 8600
#10 POWER WIRE -
(BLACK) 6100
PARK BRAKE -
(BLUE) 9000
ACC. FUSE
RIGHT REAR
SOLENOID VALVE -
(ORANGE) 3400
PRESSURE SWITCH -
(BLACK) 8100
#10 GROUND WIRE -
(WHITE) 6230
FROM +12 ACC. - (BROWN) 6120
NOTE: THE (4) DIGIT WIRE NUMBER
SUPERSEDES ANY AND ALL WIRE COLORS.
(+12 VOLTS)
MP85.3025
12MAY03

MP85.3032
05FEB99
PUMP RELAY
VIEW FROM TANK END
MANIFOLD DIAGRAM
+
GROUND
BATTERY
(WHITE) 6231
PUMP MUST BE MOUNTED SOLIDLY TO FRAME. SOME PUMPS HAVE A
GROUND CABLE THAT IS TO BE ATTACHED TO THE GROUND STUD.
* FUSE
* FUSE MAY BE REQUIRED - CHECK APPLICABLE CODE
FRAME, USE THE GROUND STUD TO ATTACH THE
THE PUMP TO THE BRACKET. IF THE PUMP BRACKET
IS BOLTED TO THE FRAME, USE THE GROUND STUD
TO ATTACH THE BRACKET TO THE FRAME.
-
(GRAY) 8600
PUMP/MANIFOLD
HARNESS
(BLACK) 6100
(ORANGE) 3400
(WHITE) 6240
(GREEN) 2400
A
B
(BLUE) 1400
(WHITE) 6241
(WHITE) 6240
(WHITE) 6241
(BROWN) 4400
(BLACK) 8100
PUMP/MANIFOLD
HARNESS
RR RF LF LR
PRESSURE
SWITCH (50 PSI)
DO NOT REVERSE WIRE
COLORS TO A & B ON
PACKARD CONNECTORS
310 LEVELING SYSTEM
HYDRAULIC MANIFOLD-PUMP RELAY
ELECTRICAL CONNECTION DIAGRAM
SEE GROUNDING
INSTRUCTION DIAGRAM
NOTE :
IF THE PUMP BRACKET IS WELDED TO THE
BAA BB
A
NOTE:THE (4) DIGIT WIRE NUMBER
SUPERSEDES ANY AND ALL WIRE
COLORS.
40 AMP
FUSE
NOTE:THE (4) DIGIT WIRE NUMBER
SUPERSEDES ANY AND ALL WIRE COLORS.

+-
(3 USED)
USE GROUNDING STUD AND 3/8" INTERNAL
STAR LOCKWASHERS AS SHOWN.
PUMP MOUNTING GROUND CABLE
STRAP
3/8 -16 NUT
FRAME RAIL
(2 USED)
CABLE
STRAP
GROUND
3/8" INT. STAR LOCKWASHER
GROUNDING STUD
PUMP MOUNTING
POSITIONS.
PUMP/MANIFOLD HARNESS
GROUP OF WHITE
WIRES 6 INCHES FROM
END OF LOOM TO BE
(NOT USED
ON SOME PUMPS)
(NOT USED
ON SOME PUMPS)
-
GROUNDED TO STUD.
WIRES 6 INCHES FROM
GROUP OF WHITE
GROUNDED TO STUD.
END OF LOOM TO BE
+
WELDED PUMP MOUNT
SURFACE AND WIRE TERMINALS
MUST BE USED BETWEEN GROUNDING
IMPORTANT: STAR LOCKWASHER
PUMP
HARNESS
MANIFOLD
PUMP MOUNTED REMOTE
FROM FRAME
3/8" INT. STAR LOCKWASHER
(4 USED)
GROUND
STUD
STAR LOCKWASHERS AS SHOWN.
USE GROUNDING STUD AND 3/8" INTERNAL
STAR LOCKWASHER
MUST BE USED BETWEEN GROUNDING
SURFACE AND WIRE TERMINALS.
IMPORTANT:
310/325 LEVELING SYSTEM POWER UNIT/HARNESS
GROUNDING INSTRUCTIONS
MANIFOLD GROUND
PUMP RELAY ELECTRICAL
CONNECTION DIAGRAM
SEE HYDRAULIC MANIFOLD/
CONNECTION DIAGRAM
PUMP RELAY ELECTRICAL
MANIFOLD GROUND
SEE HYDRAULIC MANIFOLD/
CHANNEL
(WHITE) 6233
(WHITE) 6240
(WHITE) 6241
(WHITE) 6230
(WHITE) 6231
3/8-16 NUT
NOTE:THE (4) DIGIT WIRE NUMBER
SUPERSEDES ANY AND ALL WIRE COLORS.
6233
(WHITE) 6240
(WHITE) 6241
(WHITE) 6231
(WHITE) 6230
NOTE:THE (4) DIGIT WIRE NUMBER
SUPERSEDES ANY AND ALL WIRE COLORS.
ELECTRICAL CONNECTION DIAGRAM
MP85.3043
12MAY03

CONNECT THIS END
TO IGNITION "ON" POWER
5-15 AMP FUSE
+
_
BUZZER
DO NOT USE PURPLE
WIRE. REMOVE PURPLE WIRE
FROM MTA CONNECTOR
SPLICE BROWN WIRE FROM
HWH LIGHT PLATE TO BROWN
PIGTAIL WITH BUTT CONNECTOR
SEE TOUCH PANEL
CONNECTION
DIAGRAM
+12 - (PURPLE) 6121
CONTROL WIRE - (BROWN) 7699
WARNING LIGHT WIRES ARE PLUGGED
DIRECTLY INTO THE TOUCH PANEL
+
-
MASTER LIGHT/BUZZER CONNECTION DIAGRAM
MANUAL LEVELING SYSTEMS
CAUTION: THE PURPLE WIRE IN THE MASTER WARNING LIGHT PIGTAIL IS HOT WHENEVER THE IGNITION
IS "ON" OR IN "ACC". THE PURPLE WIRE MUST BE REMOVED FROM THE PIGTAIL WHEN USING DIRECT IGNITION
VOLTAGE FOR THE MASTER WARNING INDICATORS.
FIGURE 1
FIGURE 2
310 SERIES
SEE TOUCH PANEL
DIAGRAM
CONNECTION
NOTE:
JACKS DOWN
LIGHT INCLUDED
IN HARDWARE KIT
MP85.3053
10OCT02
A MASTER WARNING INDICATOR SHOULD ALWAYS BE USED. WHEN THE LEVELING SYSTEM HAS STRAIGHT-ACTING
JACKS A WARNING BUZZER MUST BE USED.
WHEN ONLY A RED MASTER WARNING LIGHT IS USED THE +12 POWER FOR THE LIGHT COMES THROUGH THE TOUCH
PANEL. (SEE FIGURE 1 BELOW.) WHEN BOTH A RED LIGHT AND WARNING BUZZER ARE USED THE +12 POWER FOR
BOTH INDICATORS IS SUPPLIED BY THE IGNITION SWITCH. THE POWER MUST COME FROM THE "ON" SIDE OF THE
IGNITION SWITCH, NOT THE "ACC" SIDE. (SEE FIGURE 2 BELOW.)
NOTE: BY SUPPLYING IGNITION POWER TO THE WARNING BUZZER AND LIGHT, AND "ACC" POWER TO THE CONTROL
BOX, THE SYSTEM MAY BE OPERATED IN ACCESSORY WITHOUT THE BUZZER SOUNDING. THE NEGATIVE SIGNAL
FOR THE WARNING INDICATORS MUST ALWAYS COME FROM THE TOUCH PANEL.
NOTE:THE (4) DIGIT WIRE NUMBER
SUPERSEDES ANY AND ALL WIRE COLORS.
PIGTAIL W/DIODE
AND IN-LINE FUSE HOLDER -
(PURPLE) 6121
PIGTAIL PROVIDED -
(BROWN) 7699
NOTE:THE (4) DIGIT WIRE NUMBER
SUPERSEDES ANY AND ALL WIRE COLORS.
12V

BREATHER CAP - DIPSTICK - 1/4" NUT DRIVER
MP85.999X
10JAN07
VALVE RELEASE
NUT 1 1/2" DIAMETER
SOLENOID VALVE
NOTE: DO NOT turn the valve
release nut more than 4 and 1/2
(four and one half) turns counter
clockwise. Damage to the valve
may result.
OIL LEVEL
BREATHER CAP
OIL LEVEL GROOVES
1/4" NUT DRIVER
NOTE: THE BREATHER CAP IS LOCATED
ON THE TOP SIDE OF THE POWER UNIT RESERVOIR.
IMPORTANT: PRIOR TO REMOVING THE BREATHER CAP,
EITHER TO CHECK THE OIL LEVEL OR TO USE THE 1/4" NUT DRIVER,
CLEAN ANY DEBRIS FROM THE TOP OF THE RESERVOIR.
INCLUDING DEBRIS INSIDE THE 1/4" NUT DRIVER.
REMOVE ANY PAINT CHIPS OR OTHER DEBRIS FROM THE DIPSTICK
BEFORE RETURNING THE BREATHER CAP TO THE RESERVOIR,
VALVE RELEASE
NUT
to the valve may result.
turn counter clockwise. Damage
NOTE: DO NOT turn the valve
release nut more than 1 full
PLASTIC PLUG
REMOVE TO
GAIN ACCESS
TO THE 1/4"
VALVE RELEASE
NUT
SOLENOID VALVE
2 1/4" DIAMETER