MI91.1275
01SEP15
625 TROUBLE SHOOTING STEPS
AUTOMATIC LEVELING
PART 4. DURING THE STABILIZING MODE ONE OR MORE JACKS LIFTS THE VEHICLE TO HIGH.
1. If a jack lifts the vehicle more than 3/4 inch but does not extend completely, the pressure
a. If the red LEDs for the front pressure switches are on and the front jacks continue
switch may need to be adjusted. Remove the rubber boot, loosen the jam nut and turn
the threaded portion counterclockwise 1/4 turn and retry. Repeat as necessary. If
adjusting the switch does not work, replace the pressure switch.
2. If a jack continues to extend and the pump will not shut off, check the red LED in the
control box for that pressure switch.
NOTE: If both red LEDs for the front pressure switches are not on,
both front jacks will continue to extend.
to extend, replace the control box. If a rear pressure switch LED is on and it’s jack
continues to extend, replace the control box.
b. If a jack is on the ground lifting the vehicle and it’s pressure switch LED is not on, the
pressure switch is bad, the wire is bad or the control box is the problem. Unplug the
pressure switch and ground the harness pin for that wire. If the red LED comes on,
replace the pressure switch. If the red LED does not come on, unplug the 12 pin gray
connector from the control box. Ground the appropriate pin in the box receptacle.
If the LED comes on, the harness wire or it’s connections are bad. If the red LED
does not come on, replace the control box.
EXCESS SLOPE: EXCESS SLOPE IS WHEN ONE OR TWO JACKS REACH FULL EXTENSION AND
ONE OR MORE YELLOW LEVEL LIGHTS REMAIN ON. WHEN THIS HAPPENS, THE 3000# PRESSURE
SWITCH ON THE MANIFOLD CLOSES SENDING A GROUND SIGNAL TO THE CONTROL BOX. THE
PUMP WILL SHUT OFF, THE SYSTEM WILL NOT STABILIZE AND THE TOUCH PANEL WILL TURN
OFF WITH THE "EXCESS SLOPE" LIGHT REMAINING ON. THE "EXCESS SLOPE" LIGHT WILL BE
ON WHENEVER THE IGNITION IS ON UNTIL THE JACKS ARE COMPLETELY RETRACTED WITH
THE "STORE" BUTTON OR THE PARK BRAKE IS RELEASED.
1. If the system will not go EXCESS SLOPE, the pressure switch is not working, the control box
is bad, the pressure wire (8100) is bad or the pump is the problem. The green LED 31 in the
control box should be on when the 3000# pressure switch comes on.
a. Unplug the 3000# switch and ground wire 8100. If LED 31 does not come on,
unplug the 12 pin brown plug from the control box and ground pin 2 in the control
box receptacle. If LED 31 does not come on, replace the control box. If the LED
comes on, the problem is the wire 8100 or it’s connections.
b. If LED 31 comes on when wire 8100 is grounded, retry automatic leveling with wire
SEE: MP85.184J
SEE: MP85.184J & MP85.091C
SEE: MP85.102K & MP85.184J
8100 grounded. Make sure a yellow level indicator light is lit. The pump should
shut off and the "EXCESS SLOPE" light should come on several seconds after the
pump starts running. If the pump continues to run, the problem is the control box.
If the panel shows "EXCESS SLOPE" the problem is the pressure switch or the
pump pressure is not high enough. Check the pump pressure. The pressure
should be between 3300# and 3600#. If the pump pressure is to low, replace the
pump. If the pump pressure is OK, replace the 3000# pressure switch.
PF3
22
MP85.184J
THE RED LED (18) WILL NOT BE ON. THE RED LED
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
NORMALLY CLOSED RELAY. WHEN THE YELLOW
NOTE: THE TRAVEL RELAY IS WIRED AS A
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
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.
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS SEE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH INPUT VOLTAGE IN THE
NO RED LED IS COMING ON THERE MAY BE
IF THE YELLOW LED’S ARE WORKING BUT
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
A LIT RED LED INDICATES THERE IS
IS A GROUND SIGNAL TO TURN THE
NOTE: A LIT YELLOW LED INDICATES THERE
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
IF A YELLOW LED IS LIT AND THE
CORRESPONDING RELAY ON.
4-PIN CONNECTOR.
OR CONNECTION CABLE
SENSING UNIT
BOX CONNECTION INFORMATION.
FRONT
GROUND
LEFT SIDE
PIN 1
RIGHT SIDE
REAR
+12V
39
27
26
28
24
25
23
SYSTEMS.
38
37
36
F10
32-RED
35-RED
36-RED
37-RED
39-RED
38-RED
34-RED
33-GREEN
23-YELLOW
25-RED
26-RED
27-RED
28-RED
29-RED
30-YELLOW
31-GREEN
24-YELLOW
PF4
13AUG07
F10 - 10 AMP
MP85.184J
LEFT FRONT PRESS SW
RIGHT FRONT PRESS SW
LEFT REAR PRESS SW
3000 LB PRESS SW INPUT
MASTER WARN CONTROL
RIGHT REAR PRESS SW
RIGHT REAR WARN SW
LEFT REAR WARN SW
JACK INTERRUPT
ACCESSORY OUT FOR
MASTER WARNING
50 LB PRESS SW INPUT
PARK BRAKE
BOARD ENABLE
ACCESSORY IN
LINK LIGHT
NOT USED
NOT USED
PF4
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
LEFT
31
FRONT
CRX2
FRONT
RIGHT
LEFT
REAR
REAR
RIGHT
DUMP
LED
FUSE
2
1
F2
11
12
4
F1
3
MASTER
RELAY
RELAY
PUMP
21
29 30
TRAVEL
19
13
14
F6
F7
8
18
F3
17
F8
6
16
15
5
7
1-YELLOW
CRX1
33 34 35
32
20
F9
F4
13-YELLOW
16-RED
18-RED
17-YELLOW
19-YELLOW
20-YELLOW
21-YELLOW
22-YELLOW
15-YELLOW
14-RED
4-RED
6-RED
8-RED
12-RED
5-YELLOW
7-YELLOW
11-YELLOW
3-YELLOW
2-RED
LED
FUSE
F1 - 15 AMP
F2 - 15 AMP
F3 - 15 AMP
F4 - 15 AMP
F6 - 5 AMP
F7 - 5 AMP
F8 - 5 AMP
F9 - 5 AMP
RIGHT REAR COIL
LEFT REAR OUTPUT
RIGHT FRONT COIL
RIGHT FRONT OUTPUT
LEFT FRONT COIL
LEFT FRONT OUTPUT
MASTER RELAY COIL
RIGHT REAR OUTPUT
LEFT FRONT WARN SW
RIGHT FRONT WARN SW
MASTER RELAY OUTPUT
PUMP OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
PUMP COIL
CRX 1
CRX 2
DUMP COIL
DUMP OUTPUT
LEFT REAR COIL
RELAY DESCRIPTION
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
PILOT AIR DUMP - PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
MP85.091C
TO HWH
GROUND
WARNING
SWITCH
PILOT AIR DUMP
STUD
LEFT REAR
4000
A
B
4200
6235
9301
9300
6231
6230
CONNECTION
PRESSURE
SWITCH
LIGHT
C
A
B
6231
9300
9301
6230
WARNING
SWITCH
PRESSURE
6111
BUZZER
FUSE
6111
PARK BRAKE
SWITCH
7699
WARNING
LIGHT
DIODE
DIODE
7699
7699
5AMP
+
LEFT FRONT
MASTER
1000
6110
A
B
1200
6235
SWITCH
9001 - TO
PARK BRAKE
9000
_
6120
9000
7699
TRAVEL
BRAKE
SLOPE
EXCESS
HWH COMPUTERIZED LEVELING
TOUCH PANEL
CAUTION!
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
TO IGNITION
TO ACCESSORY
STORE
AUTO
EMERGENCY
STOP
MODE
AUTO
LEVEL
PARK/
R
NOT IN
RETRACT
RETRACT
EXTEND
MANUAL
EXTEND
RIGHT REAR
MP85.091C
08AUG07
6235
SWITCH
WARNING
3000
A
B
3200
PRESSURE
SWITCH
GRAY
BLACK
8 PIN
12 PIN
GRAY
RIGHT FRONT
PILOT DUMP
CONNECTION
DIAGRAM - 625 SERIES
MANIFOLD - PUMP AND
MASTER RELAYS
LEVELING SYSTEM - LEVELING
SEE ELECTRICAL CONNECTION
4 PIN
12 PIN
BLACK
12 PIN
BROWN
12 PIN
GREEN
PRESSURE
SWITCH
6235
SWITCH
6230 - 6231
2000
9301
9300
WARNING
A
B
2200
BY OEM
ELECTRICAL CONNECTION DIAGRAM
625 SERIES SINGLE STEP LEVELING SYSTEM
MP85.102K
+
TO PUMP
MOTOR
#6
#7
RELAY
PUMP
#4
#5
#3
#1
8600
TO 3000 LB PRESSURE SWITCH - 8100
TO HWH GROUND STUD - 6240
PUMP
MOTOR
#9
HWH GROUND
STUD
1400
4400
6240
6240
A
B
A
B
MANIFOLD
LEVELING
P.E.D
P.E.D
8500
LR
LF
TO HOUSE
14JUN05
MP85.102K
BATTERY
RELAY
MASTER
#2
#8
TOUCH PANEL
HARNESS
6800
GROUND STUD
6230 - TO HWH
GRAY
4 PIN
BLACK
8 PIN
BROWN
12 PIN
PUMP AND MASTER RELAYS
LEVELING MANIFOLD
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
TO 50 LB PRESSURE SWITCH - 8101
2400
7600
7601
3400
B
B
A
A
P.E.D
P.E.D
LEVELING MANIFOLD
RF
RR
50 LB PRESS SW INPUT
33-GREEN
LEFT SIDE
MP85.184J
THE RED LED (18) WILL NOT BE ON. THE RED LED
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
NORMALLY CLOSED RELAY. WHEN THE YELLOW
NOTE: THE TRAVEL RELAY IS WIRED AS A
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
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.
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS SEE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH INPUT VOLTAGE IN THE
NO RED LED IS COMING ON THERE MAY BE
IF THE YELLOW LED’S ARE WORKING BUT
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
A LIT RED LED INDICATES THERE IS
IS A GROUND SIGNAL TO TURN THE
NOTE: A LIT YELLOW LED INDICATES THERE
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
4-PIN CONNECTOR.
OR CONNECTION CABLE
BOX CONNECTION INFORMATION.
IF A YELLOW LED IS LIT AND THE
CORRESPONDING RELAY ON.
GROUND
39
SYSTEMS.
38
37
36
35-RED
36-RED
37-RED
39-RED
38-RED
34-RED
F10 - 10 AMP
MP85.184J
13AUG07
JACK INTERRUPT
ACCESSORY OUT FOR
MASTER WARNING
PARK BRAKE
BOARD ENABLE
ACCESSORY IN
LINK LIGHT
PF4
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
LEFT
31
TRAVEL
MASTER
RELAY
RELAY
PUMP
DUMP
SENSING UNIT
PIN 1
RIGHT SIDE
REAR
+12V
FRONT
23
27
26
28
24
25
21
22
29 30
RIGHT
LED
FUSE
2
1
F2
11
12
4
F1
3
REAR
LEFT
REAR
FRONT
CRX2
FRONT
RIGHT
19
13
14
F6
F7
8
18
F3
17
F8
6
16
15
5
7
14-RED
F10
33 34 35
32
25-RED
26-RED
27-RED
28-RED
29-RED
30-YELLOW
31-GREEN
24-YELLOW
32-RED
PF4
16-RED
18-RED
17-YELLOW
19-YELLOW
20-YELLOW
21-YELLOW
22-YELLOW
15-YELLOW
23-YELLOW
PF3
CRX1
20
F9
F4
2-RED
4-RED
6-RED
8-RED
12-RED
5-YELLOW
7-YELLOW
11-YELLOW
3-YELLOW
13-YELLOW
1-YELLOW
LED
FUSE
F1 - 15 AMP
F2 - 15 AMP
F3 - 15 AMP
F4 - 15 AMP
F6 - 5 AMP
F7 - 5 AMP
F8 - 5 AMP
F9 - 5 AMP
MASTER RELAY OUTPUT
LEFT FRONT WARN SW
RIGHT FRONT WARN SW
LEFT FRONT PRESS SW
RIGHT FRONT PRESS SW
LEFT REAR PRESS SW
3000 LB PRESS SW INPUT
MASTER WARN CONTROL
RIGHT REAR PRESS SW
RIGHT REAR WARN SW
LEFT REAR WARN SW
NOT USED
NOT USED
PUMP OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
PUMP COIL
CRX 1
CRX 2
RELAY DESCRIPTION
LEFT REAR OUTPUT
RIGHT FRONT COIL
RIGHT FRONT OUTPUT
LEFT FRONT COIL
LEFT FRONT OUTPUT
MASTER RELAY COIL
RIGHT REAR OUTPUT
RIGHT REAR COIL
DUMP COIL
DUMP OUTPUT
LEFT REAR COIL
SEE: MP85.102K & MP85.184J & MP65.600C
MP65.600C
NOTE: BEFORE OPERATING ANY MANUAL VALVE RELEASE
READ AND UNDERSTAND PROCEDURE FOR MANUAL JACK
RETRACTION IN OPERATOR’S INSTRUCTIONS.
HYDRAULIC LINE CONNECTION DIAGRAM
(WITH 4 STRAIGHT-ACTING JACKS)
625 SERIES LEVELING SYSTEM
VELOCITY VALVE
(ROOM EXTENSION MANIFOLD NOT SHOWN)
"T"-HANDLES AND (2) SMALL VALVES THAT HAVE VALVE RELEASE
NUTS. SOME MANIFOLDS WILL HAVE (4) LARGE VALVES AND
SOME MANIFOLDS WILL HAVE (4) SMALL VALVES.
IS SHOWN WITH (2) LARGE VALVES THAT HAVE VALVE RELEASE
MP65.2802
LEFT
REAR
SWITCH
PRESSURE
3000 PSI
CHECK PUMP
MANIFOLDS
VALVES
PRESSURE
NOTE: SOME
ARE EQUIPPED
WITH VELOCITY
HERE
LR
LEFT
FRONT
CAP
VALVE
RELEASE
NUTS
BREATHER
08AUG06
50 PSI
SWITCH
PRESSURE
PUMP/MANIFOLD
ASSEMBLY
LF
RF
RR
REAR
RIGHT
MP65.600C
625 MANIFOLDS.
BE USED ON ALL
SWITCH MAY NOT
PRESSURE
NOTE: 50 PSI
SHUTTLE
VALVE
THIS MANIFOLD
RELEASE
VALVE
"T" HANDLES
RIGHT
FRONT
