MI91.1260
19MAY08
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
PART 13. ONE OR MORE JACKS WILL NOT RETRACT WHEN A DOWN ARROW (RETRACT)
BUTTON IS PUSHED. SOME JACKS WILL RETRACT.
1.
a. If the jack will not retract, the problem is the hose, velocity valve (if so equipped)
The pump should not run when a DOWN ARROW is pushed. If a pump runs when
a DOWN ARROW is pushed, the control box or touch panel is the problem.
2. Open the valve release nuts (small valve - 4 1/2 complete turns;
large valve - 1 complete turn) or the valve release T-handle (large
or the jack. Slowly remove the hose from the jack. If the jack does not retract,
replace the jack. If the jack starts to retract, tighten the hose and loosen the hose
at the manifold. If the jack does not retract, there is a problem with the hose, such
as a kink. If the jack retracts and the manifold is equipped with a velocity valve,
the valve is most likely the problem. If there is no velocity valve, there may be a
check valve or solenoid valve problem. Contact HWH technical service.
3. If the jack retracts when the valve is manually opened, the control box is most likely
the problem. If the jack will extend, the valve and it’s connection to the control box
a. Check the yellow and red LEDs for the jack that is not retracting. If the yellow LED
is not coming on while the down arrow is being pushed, replace the control box.
If the yellow LED is coming on, review PART 11, 1b and 1c. If a jack will extend,
the solenoid valve and wiring should be OK when pushing a DOWN ARROW also.
REMEMBER LOW VOLTAGE WILL CAUSE PROBLEMS.
CAUTION:
DO NOT CRAWL UNDER ANY VEHICLE SUPPORTED ON THE LEVELING
JACKS WITHOUT PROPERLY SUPPORTING THE FRAME OF THE VEHICLE
SO IT CANNOT DROP WHEN THE FLUID IS RELEASED FROM A JACK.
PART 14. NO JACKS WILL RETRACT WHEN PUSHING ANY OF THE DOWN ARROW (RETRACT) BUTTONS.
1. Check the yellow and red LEDs for the solenoid valves while pushing the DOWN
ARROW buttons. If the yellow LEDs are not coming on, the problem is the control
box or touch panel. If the red LEDs are not coming on, the master relay may have a
problem, refer to PART 7. If the yellow and red LEDs are coming on, the problem is
most likely the shuttle valve. Open the valve release nut (small valve - 4 1/2 complete
turns; large valve - 1 complete turn) or the valve release T-handle (large valve -
approximately 5 full turns counter-clockwise). If the jacks retract, the problem is
the solenoid valves or their connections. If the jacks do not retract, replace the
NOTE: Remember yellow LEDs 19 and 20 should be on whenever the touch panel is on
except during the automatic retract mode. If LED 19 is not on, the right rear solenoid
valve will not function. If LED 20 is not on, the right front solenoid valve will not function.
SEE: MP65.600C
SEE: MP65.600C
SEE: MP85.184J
SEE: MP85.184J & MP65.600C
SEE: MP85.184J
PART 15. A JACK RED WARNING LIGHT WILL NOT GO OUT
1. Check the yellow LED for the proper warning switch input in the control box. Number 21
is for the left front jack, 22 is for the right front jack, 23 is for the right rear jack and 24 is
for the left rear jack. If the warning switch LED is not on, replace the control box.
SEE: MP85.184J
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
A LIT RED LED INDICATES THERE IS
(ROOM EXTENSION MANIFOLD NOT SHOWN)
MP65.600C
3000 PSI
PRESSURE
SWITCH
REAR
LEFT
ASSEMBLY
PUMP/MANIFOLD
VELOCITY VALVE
23FEB04
MP65.600C
RIGHT
REAR
LATER LED’S 3 AND 19 WILL TURN OFF.
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
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
625 SERIES LEVELING SYSTEM
(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
RR
BREATHER
RELEASE
WITH VELOCITY
ARE EQUIPPED
NOTE: SOME
MANIFOLDS
VALVE
VALVES
NUTS
LEFT
FRONT
CAP
LF
LR
RF
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
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
OR CONNECTION CABLE
4-PIN CONNECTOR.
IF A YELLOW LED IS LIT AND THE
SYSTEMS.
FRONT
RIGHT
RELEASE
"T" HANDLES
PRESSURE
SHUTTLE
SWITCH
50 PSI
VALVE
VALVE
THIS MANIFOLD
13AUG07
MP85.184J
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
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
5-YELLOW
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
PIN 1
27
CORRESPONDING RELAY ON.
BOX CONNECTION INFORMATION.
LEFT SIDE
GROUND
+12V
REAR
FRONT
RIGHT SIDE
28
39
SENSING UNIT
FUSE
LED
DUMP
12
11
25
24
26
21
23
22
29 30
RELAY
RELAY
MASTER
F7
F6
14
13
PUMP
TRAVEL
17
18
15
16
F8
38
36
37
38-RED
39-RED
37-RED
34-RED
36-RED
35-RED
33-GREEN
31-GREEN
30-YELLOW
32-RED
29-RED
28-RED
27-RED
35
32
34
33
F10
F9
17-YELLOW
24-YELLOW
25-RED
26-RED
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
18-RED
PF4
PF3
14-RED
15-YELLOW
16-RED
13-YELLOW
11-YELLOW
7-YELLOW
12-RED
8-RED
6-RED
LEFT
F1
RIGHT
1
2
REAR
F2
3
4
REAR
LEFT
CRX2
FRONT
19
RIGHT
FRONT
7
8
5
6
F3
CRX1
F4
20
2-RED
3-YELLOW
4-RED
1-YELLOW
LED
RIGHT FRONT COIL
F7 - 5 AMP
F9 - 5 AMP
F8 - 5 AMP
F10 - 10 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
JACK INTERRUPT
MASTER WARNING
ACCESSORY OUT FOR
RIGHT REAR PRESS SW
50 LB PRESS SW INPUT
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
LEFT REAR PRESS SW
LINK LIGHT
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
NOT USED
NOT USED
PF4
MASTER RELAY OUTPUT
LEFT FRONT PRESS SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
RIGHT FRONT PRESS SW
LEFT FRONT COIL
MASTER RELAY COIL
LEFT FRONT OUTPUT
RIGHT FRONT OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
CRX 2
CRX 1
PUMP COIL
PUMP OUTPUT
DUMP OUTPUT
DUMP COIL
FUSE
F1 - 15 AMP
F2 - 15 AMP
RIGHT REAR COIL
RIGHT REAR OUTPUT
RELAY DESCRIPTION
LEFT REAR OUTPUT
LEFT REAR COIL
valve - approximately 5 full turns counter-clockwise).
should be OK.
shuttle valve. IMPORTANT: Do not remove the shuttle valve until all solenoid
valves are closed, electrically or manually.
If either LED 19 or 20 is not on, replace the control box.
RIGHT FRONT OUTPUT
F3 - 15 AMP
6-RED
LED
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
MP85.184J
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
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
LATER LED’S 3 AND 19 WILL TURN OFF.
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
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
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
IF A YELLOW LED IS LIT AND THE
4-PIN CONNECTOR.
OR CONNECTION CABLE
SYSTEMS.
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS SEE
31
A LIT RED LED INDICATES THERE IS
IS A GROUND SIGNAL TO TURN THE
NOTE: A LIT YELLOW LED INDICATES THERE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
28
BOX CONNECTION INFORMATION.
CORRESPONDING RELAY ON.
RIGHT SIDE
FRONT
REAR
GROUND
LEFT SIDE
+12V
39
SENSING UNIT
PIN 1
FUSE
12
11
DUMP
27
22
23
21
26
24
25
30
29
RELAY
14
13
F6
F7
MASTER
RELAY
16
F8
15
18
17
TRAVEL
PUMP
38
37
36
38-RED
39-RED
28-RED
37-RED
32-RED
30-YELLOW
31-GREEN
33-GREEN
35-RED
36-RED
34-RED
29-RED
33 34
32
35
F10
F9
18-RED
19-YELLOW
27-RED
20-YELLOW
21-YELLOW
22-YELLOW
23-YELLOW
26-RED
25-RED
24-YELLOW
PF3
PF4
7-YELLOW
17-YELLOW
8-RED
12-RED
11-YELLOW
13-YELLOW
16-RED
15-YELLOW
14-RED
MP85.184J
13AUG07
F4 - 15 AMP
F6 - 5 AMP
F10 - 10 AMP
F8 - 5 AMP
F9 - 5 AMP
F7 - 5 AMP
LEFT REAR PRESS SW
3000 LB PRESS SW INPUT
MASTER WARN CONTROL
50 LB PRESS SW INPUT
ACCESSORY OUT FOR
JACK INTERRUPT
MASTER WARNING
LINK LIGHT
ACCESSORY IN
NOT USED
PARK BRAKE
BOARD ENABLE
NOT USED
PF4
LEFT FRONT OUTPUT
MASTER RELAY COIL
LEFT FRONT COIL
MASTER RELAY OUTPUT
RIGHT REAR PRESS SW
RIGHT FRONT PRESS SW
LEFT FRONT WARN SW
RIGHT FRONT WARN SW
RIGHT REAR WARN SW
LEFT REAR WARN SW
LEFT FRONT PRESS SW
TRAVEL OUTPUT
CRX 2
CRX 1
TRAVEL COIL
DUMP COIL
DUMP OUTPUT
PUMP OUTPUT
PUMP COIL
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
LEFT
REAR
2
1
RIGHT
LEFT
REAR
4
3
F2
F1
19
FRONT
CRX2
F3
6
5
8
7
FRONT
RIGHT
20
F4
CRX1
5-YELLOW
1-YELLOW
4-RED
3-YELLOW
2-RED
LED
F2 - 15 AMP
F1 - 15 AMP
FUSE
RIGHT FRONT COIL
LEFT REAR OUTPUT
RELAY DESCRIPTION
RIGHT REAR OUTPUT
RIGHT REAR COIL
LEFT REAR COIL
WHEN THE JACK IS FULLY RETRACTED.
ASSEMBLY
(ROOM EXTENSION MANIFOLD NOT SHOWN)
MP65.600C
SWITCH
LEFT
REAR
VELOCITY VALVE
23FEB04
MP65.600C
RIGHT
REAR
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
625 SERIES LEVELING SYSTEM
(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
RR
BREATHER
RELEASE
WITH VELOCITY
ARE EQUIPPED
NOTE: SOME
MANIFOLDS
3000 PSI
PRESSURE
VALVES
LEFT
FRONT
VALVE
NUTS
CAP
LF
PUMP/MANIFOLD
LR
RF
FRONT
RIGHT
PRESSURE
SHUTTLE
VALVE
SWITCH
50 PSI
"T" HANDLES
RELEASE
VALVE
THIS MANIFOLD
NOTE: Make sure the white wires of the harness and warning switch are in the "A"
pins of the Packard connectors. The black wires must be in the "B" pins of
the connectors.
