MI91.1245
10SEP07
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
5 (right front solenoid valve) and 7 (right rear solenoid valve).
the red LEDs 2 (right rear solenoid valve),
4 (left rear solenoid valve), 6 (right front solenoid valve) and 8 (left front solenoid valve)
should come on. The LEDs will come on with their respective UP ARROWS as follows:
LEDs 5 and 7 (YELLOW) and LEDs 6 and 8 (RED)
LEDs 1 and 3 (YELLOW) and LEDs 2 and 4 (RED)
LEDs 1 and 5 (YELLOW) and LEDs 2 and 6 (RED)
LEDs 3 and 7 (YELLOW) and LEDs 4 and 8 (RED)
If the red LEDs are not coming on,
If the red LEDs are coming on as necessary,
on the appropriate output pins for the solenoid valves. There is most likely a problem
with the 12 pin brown connector on the back of the control box, the wires to the
REAR UP ARROW
RIGHT SIDE UP ARROW
LEFT SIDE UP ARROW
SEE: MP85.184J
THE PUMP RUNS UNDER A LOAD.
3. Check yellow LEDs 1 (right rear solenoid valve), 3 (left rear solenoid valve),
PART 6. WHEN PUSHING ANY UP ARROW (EXTEND) BUTTON, NO JACKS WILL EXTEND,
1. Use the manual valve release on the valves to open at least two (2) of the solenoid valves.
FRONT UP ARROW
Push any up arrow to make the pump run. If the jacks start to extend, proceed to section 2.
If no jacks extend, replace the shuttle valve.
2. Check LED’s 19 and 20. If either LED is not lit, replace the control box. SEE: MP85.184J
a. If yellow LED’s 1, 3, 5 and 7 are coming on,
the 6800 wire going to the 4 pin gray connector
this indicates there should be power
solenoid valves or their connections. Check the voltage for the valves at the valve
plugs while pushing an up arrow. With the valve plugged in and the pump running,
there should be a minimum of 10 volts. If the voltage is lower with the pump running,
replace the control box.
b. If yellow LED’s 1, 3, 5 and 7 are NOT coming on,
WILL EXTEND BUT NOT LIFT THE VEHICLE. THE PUMP IS FREE WHEELING UNDER
while running, should not be less than 10 volts. If the vehicle is equipped with any
HWH hydraulic room extensions, make sure none of the room extension solenoid
If the pump pressure is OK, replace the shuttle valve.
developing adequate pressure, replace the pump.
PART 7. WHEN PUSHING ANY UP ARROW (EXTEND) BUTTON, NO JACKS WILL EXTEND OR
a. Check the pump pressure. The pump pressure should
1. The problem is most likely the shuttle valve or the pump. Voltage at the pump motor,
SEE: MP65.600C
SEE: MP85.184J & MP85.102K or MP85.1035 or MP85.1045
SEE: MP85.184J & MP85.102K or MP85.1035 or MP85.1045
SEE: MP85.184J
MASTER RELAY OUTPUT
F7 - 5 AMP
14-RED
PUMP
RELAY
RELAY
MASTER
TRAVEL
DUMP
LATER LED’S 3 AND 19 WILL TURN OFF.
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
MP85.184J
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
OR CONNECTION CABLE
4-PIN CONNECTOR.
SYSTEMS.
31
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
A LIT RED LED INDICATES THERE IS
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
LEFT SIDE
CORRESPONDING RELAY ON.
BOX CONNECTION INFORMATION.
IF A YELLOW LED IS LIT AND THE
GROUND
39
SENSING UNIT
+12V
REAR
FRONT
PIN 1
RIGHT SIDE
25
24
28
26
27
21
23
22
29 30
38
36
37
34-RED
38-RED
39-RED
37-RED
36-RED
35-RED
F10
35
32
34
33
24-YELLOW
25-RED
33-GREEN
31-GREEN
30-YELLOW
32-RED
29-RED
28-RED
27-RED
26-RED
PF4
15-YELLOW
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
17-YELLOW
18-RED
16-RED
PF3
13AUG07
MP85.184J
F9 - 5 AMP
F8 - 5 AMP
F10 - 10 AMP
JACK INTERRUPT
MASTER WARNING
ACCESSORY OUT FOR
LINK LIGHT
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
PF4
LEFT FRONT PRESS SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
RIGHT REAR PRESS SW
50 LB PRESS SW INPUT
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
LEFT REAR PRESS SW
RIGHT FRONT PRESS SW
NOT USED
NOT USED
PUMP COIL
TRAVEL OUTPUT
TRAVEL COIL
PUMP OUTPUT
CRX 2
CRX 1
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
LEFT
RIGHT
FUSE
LED
1
2
12
11
F2
3
4
F1
REAR
REAR
LEFT
RIGHT
CRX2
FRONT
FRONT
F7
F6
14
13
19
7
17
18
8
5
15
16
6
F8
F3
CRX1
F4
F9
20
2-RED
3-YELLOW
13-YELLOW
11-YELLOW
7-YELLOW
5-YELLOW
12-RED
8-RED
6-RED
4-RED
1-YELLOW
LED
FUSE
F1 - 15 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
F2 - 15 AMP
RIGHT REAR COIL
LEFT FRONT COIL
RIGHT REAR OUTPUT
RELAY DESCRIPTION
MASTER RELAY COIL
LEFT FRONT OUTPUT
RIGHT FRONT OUTPUT
RIGHT FRONT COIL
LEFT REAR OUTPUT
LEFT REAR COIL
DUMP OUTPUT
DUMP COIL
on the back of the control box may be the problem. Check fuses F1, F2, F3 and F4.
If these fuses are blown, the solenoid valves may be bad. Whenever the ignition is
on and the park brake is set, the 6800 wire should have power on it. The 6800 wire
connects to terminal 3 of the master relay. If there is no power on the 6800 wire,
the connections to the problem is with the 6800 wire or it’s control box or to the
master relay. If the pump runs, the master relay is good. If the pump does not
run, refer to PART 7. If there is power on the 6800 wire, fuses F1, F2, F3 and F4
are OK and the red LEDs will not come on, replace the control box.
that indicates there may be a problem with the system grounds or the voltage supply
to the pump motor.
MASTER RELAY OUTPUT
F7 - 5 AMP
14-RED
PUMP
RELAY
RELAY
MASTER
TRAVEL
DUMP
LATER LED’S 3 AND 19 WILL TURN OFF.
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
MP85.184J
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
OR CONNECTION CABLE
4-PIN CONNECTOR.
SYSTEMS.
31
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
A LIT RED LED INDICATES THERE IS
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
LEFT SIDE
CORRESPONDING RELAY ON.
BOX CONNECTION INFORMATION.
IF A YELLOW LED IS LIT AND THE
GROUND
39
SENSING UNIT
+12V
REAR
FRONT
PIN 1
RIGHT SIDE
25
24
28
26
27
21
23
22
29 30
38
36
37
34-RED
38-RED
39-RED
37-RED
36-RED
35-RED
F10
35
32
34
33
24-YELLOW
25-RED
33-GREEN
31-GREEN
30-YELLOW
32-RED
29-RED
28-RED
27-RED
26-RED
PF4
15-YELLOW
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
17-YELLOW
18-RED
16-RED
PF3
13AUG07
MP85.184J
F9 - 5 AMP
F8 - 5 AMP
F10 - 10 AMP
JACK INTERRUPT
MASTER WARNING
ACCESSORY OUT FOR
LINK LIGHT
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
PF4
LEFT FRONT PRESS SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
RIGHT REAR PRESS SW
50 LB PRESS SW INPUT
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
LEFT REAR PRESS SW
RIGHT FRONT PRESS SW
NOT USED
NOT USED
PUMP COIL
TRAVEL OUTPUT
TRAVEL COIL
PUMP OUTPUT
CRX 2
CRX 1
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
LEFT
RIGHT
FUSE
LED
1
2
12
11
F2
3
4
F1
REAR
REAR
LEFT
RIGHT
CRX2
FRONT
FRONT
F7
F6
14
13
19
7
17
18
8
5
15
16
6
F8
F3
CRX1
F4
F9
20
2-RED
3-YELLOW
13-YELLOW
11-YELLOW
7-YELLOW
5-YELLOW
12-RED
8-RED
6-RED
4-RED
1-YELLOW
LED
FUSE
F1 - 15 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
F2 - 15 AMP
RIGHT REAR COIL
LEFT FRONT COIL
RIGHT REAR OUTPUT
RELAY DESCRIPTION
MASTER RELAY COIL
LEFT FRONT OUTPUT
RIGHT FRONT OUTPUT
RIGHT FRONT COIL
LEFT REAR OUTPUT
LEFT REAR COIL
DUMP OUTPUT
DUMP COIL
NO LOAD.
valves are open.
3400
7601
7600
2400
6240
6240
4400
1400
TO HWH GROUND STUD - 6240
MP85.102K
MASTER
RELAY
PUMP
#7
RELAY
#8
MP85.102K
14JUN05
4 PIN
GRAY
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
TO 3000 LB PRESSURE SWITCH - 8100
#9
TO PUMP
MOTOR
+
MOTOR
PUMP
#6
8600
LEVELING
MANIFOLD
HWH GROUND
STUD
#1
#3
#5
#4
8500
TO 50 LB PRESSURE SWITCH - 8101
LEVELING MANIFOLD
PUMP AND MASTER RELAYS
LEVELING MANIFOLD
P.E.D
A
A
B
B
A
B
A
P.E.D
P.E.D
P.E.D
B
RR
LF
LR
RF
HARNESS
6230 - TO HWH
GROUND STUD
6800
TO HOUSE
BATTERY
#2
BROWN
8 PIN
BLACK
TOUCH PANEL
12 PIN
12 PIN
MP85.1035
8600
NOTE: ROOM EXTENSION
MANIFOLD NOT SHOWN
PUMP
MOTOR
#6
#7
#9
MOTOR
TO PUMP
+
HWH GROUND
GROUND STUD
6231 - TO HWH
STUD
LEVELING
MANIFOLD
PUMP
RELAY
#5
#4
#3
#1
8500
6230 - TO HWH
GROUND STUD
MP85.1035
27APR05
GRAY
12 PIN
TO +12V
6800
BATTERY
MASTER
RELAY
#2
#8
6100
4 PIN
GRAY
BROWN
8 PIN
BLACK
12 PIN
BLACK
LEVELING MANIFOLD
PUMP AND MASTER RELAYS WITH PILOT AIR DUMP
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
TO 50 LB PRESSURE SWITCH - 8101
TO 3000 LB PRESSURE SWITCH - 8100
TO HWH GROUND STUD - 6240
6240
6240
4400
A
B
A
3400
7601
7600
2400
1400
B
A
A
B
B
P.E.D
P.E.D
P.E.D
P.E.D
LEVELING MANIFOLD
LF
LR
RR
RF
GROUND STUD
SEE ELECTRICAL
625 SERIES LEVELING
SYSTEM - AIR DUMP
9301
6230
9300
TO HWH
CONNECTION
DIAGRAM
LEVELING MANIFOLD
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
PUMP AND MASTER RELAYS
LEVELING MANIFOLD - AIR DUMP
MOTOR
PUMP
MOTOR
#7
#6
RELAY
PUMP
#4
#5
TO PUMP
#9
+
8600
HWH GROUND
MANIFOLD
STUD
TO HWH GROUND STUD - 6240
TO 3000 LB PRESSURE SWITCH - 8100
TO 50 LB PRESSURE SWITCH - 8101
1400
4400
6240
6240
A
B
A
B
2400
7600
7601
B
A
A
B
3400
LEVELING
P.E.D
P.E.D
P.E.D
P.E.D
RF
RR
LR
LF
HARNESS
TOUCH PANEL
GROUND STUD
6230 - TO HWH
BLACK
8 PIN
RELAY
MASTER
#1
#3
BATTERY
#8
#2
TO HOUSE
6800
14JUN05
MP85.1045
6230
9300
REAR AIR DUMP SOLENOID
REAR AIR DUMP SOLENOID
FRONT AIR DUMP SOLENOID
BROWN
TO HWH GROUND
GRAY
4 PIN
9300
12 PIN
STUD - 6230
A
B
P.E.D
B
A
B
A
B
A
MP85.1045
IS SHOWN WITH (2) LARGE VALVES THAT HAVE VALVE RELEASE
SOME MANIFOLDS WILL HAVE (4) SMALL VALVES.
NUTS. SOME MANIFOLDS WILL HAVE (4) LARGE VALVES AND
"T"-HANDLES AND (2) SMALL VALVES THAT HAVE VALVE RELEASE
(ROOM EXTENSION MANIFOLD NOT SHOWN)
VELOCITY VALVE
625 SERIES LEVELING SYSTEM
ASSEMBLY
PUMP/MANIFOLD
(WITH 4 STRAIGHT-ACTING JACKS)
HYDRAULIC LINE CONNECTION DIAGRAM
RETRACTION IN OPERATOR’S INSTRUCTIONS.
READ AND UNDERSTAND PROCEDURE FOR MANUAL JACK
NOTE: BEFORE OPERATING ANY MANUAL VALVE RELEASE
MP65.2802
REAR
LEFT
3000 PSI
PRESSURE
WITH VELOCITY
ARE EQUIPPED
NOTE: SOME
SWITCH
HERE
PRESSURE
VALVES
MANIFOLDS
LR
LF
FRONT
LEFT
CHECK PUMP
BREATHER
NUTS
RELEASE
VALVE
CAP
NOTE: 50 PSI
PRESSURE
SWITCH MAY NOT
BE USED ON ALL
625 MANIFOLDS.
RF
RR
PRESSURE
VALVE
SHUTTLE
SWITCH
50 PSI
08AUG06
MP65.600C
RIGHT
REAR
"T" HANDLES
VALVE
RELEASE
THIS MANIFOLD
FRONT
RIGHT
be between 3300 p.s.i. and 3600 p.s.i. If the pump is not
MP65.600C
