MI91.327M
19MAR12
PART 7a. SECTION E.1.a. CONTINUED
or more at the pump motor when running under load. If pump pressure is ok, replace the shuttle
relays, cables and the battery supply. Repair problem equipment so there is at least 10.5 volts
If the voltage is below 9 volts, check electrical connections, the pump ground, master and pump
If voltage is good at the relay and low at the valves, there is a problem with the I/O module or the
main ground for the I/O module. If voltage is low at the master relay, check voltage into the relay
and replace or repair equipment as needed to fix the voltage problem. If voltage at the solenoid
valves is ok, the problem is the solenoid valves. It would be rare to have 4 bad valves so you
should contact HWH Corporation to discuss possible issues that could cause all 4 valves to be
briefly and goes out, replace the solenoid valve. If the LED is staying on but the jack will not extend,
If the LED is coming on, plug the valve back in and retry. If the LED will not come on or comes on
while pushing the appropriate UP arrow button. If the LED does not come on, replace the I/O module.
a couple minutes then turn the ignition back on to the "ACC." position and check the solenoid valve LED
Make sure the ignition is off. Unplug the valve for the jack that will not extend. Wait
2. The solenoid valve LED for the jack that will not extend is not coming on while pushing the
to the manifold fitting. Check the pressure while pushing the UP arrow button.
remove that jack hose from the manifold and attach a pressure gauge
system voltage at the master relay. If there is low voltage only at one valve, replace the I/O module.
voltage is low, check voltage at other valves that are working. If voltage is marginal for other valves, check
arrow button with the valve plugged in. If voltage is 8.5 volts or better, replace the solenoid valve. If
check voltage between the white and black wire for the solenoid valve while pushing the UP
Manually open the solenoid valve then push an UP arrow button for that jack.
1. The solenoid valve LED is coming on while pushing the UP arrow button but the jack will not
button. There should always be two solenoid valve LEDs on while pushing an UP arrow button.
Check the appropriate solenoid valve LEDs while pushing the UP arrow
ONE OR MORE JACKS WILL NOT EXTEND. OTHER JACKS ARE WORKING PROPERLY AND THE
part 1. If the LEDs do not come on or come on briefly and go out, replace the solenoid valves.
come on and stay on, the jacks should be extending. If they are not extending, check PART 7 Section E
come on, plug the valves back in. Again check the LEDs while pushing an UP arrow button. If the LEDs
while pushing an UP arrow button. If the LEDs do not come on, replace the I/O module. If the LEDs
sure the ignition is off. Wait several minutes. Turn the ignition on and check the solenoid valve LEDs
Make sure the valves are marked so they can be reconnected easily. Unplug all four valves and make
there are two possibilities. Either the I/O module is bad or there are 4 bad solenoid valves.
2. If the solenoid valve LEDs are not coming on while pushing UP arrow buttons and the pump
should contact HWH Corporation to discuss possible issues that could cause all 4 valves to be bad.
valves is ok, the problem is the solenoid valves. It would be rare to have 4 bad valves so you
and replace or repair equipment as needed to fix the voltage problem. If voltage at the solenoid
main ground for the I/O module. If voltage is low at the master relay, check voltage into the relay
If voltage is good at the relay and low at the valves, there is a problem with the I/O module or the
If voltage is low, check the voltage at terminal #3 of the master relay while pushing an up arrow.
pushing the UP arrow buttons. If there is a minimum of 8.5 volts at the valve, the valve should open.
the valve plugged in, check voltage between the white and black wire for the solenoid valves while
b. If the jack extends after manually opening the valve,
PUMP IS RUNNING NORMALLY.
check Part 1 of this section.
UP arrow button.
If the jack still does not extend,
extends,
extend.
SEE: MP84.3240
SEE: MP64.3917 and MP84.3240
SEE: MP84.3240
is running,
F.
bad.
SEE: MP64.3917 and MP84.3240
SEE: MP84.3170
If the jack now
SEE: MP84.3240
SEE: MP84.3240
there is a valve or voltage issue. With
MANUAL SYSTEM OPERATION
725 TROUBLE SHOOTING STEPS
valve.
If there is good
pressure,
there is a problem with the
If there is no pressure,
solenoid valve or the inner check valve for that jack. Contact HWH Corporation for assistance.
reconnect the hose to the manifold and remove the hose at the jack. There should be a
good flow of fluid to the jack when pushing the UP arrow. If there is no flow, the hose is the problem.
If there is good flow, replace the jack cylinder.
MP64.3917
MP84.3170
LEFT FRONT JACK
LEFT REAR JACK
LINK LIGHT
MASTER RELAY
PUMP RELAY
DUMP
TRAVEL
GROUND STUD
RIGHT REAR JACK
RIGHT FRONT JACK
ELECTRICAL CONNECTION DIAGRAM
MULTIPLEXED INPUT/OUTPUT MODULE
LED AND WIRE/CONNECTION INFORMATION
NOTE: DUMP AND TRAVEL LEDS PRESENT
BUT NOT ALWAYS USED
VALVE RELEASE, READ AND UNDERSTAND
PROCEDURE FOR MANUAL JACK RETRACTION
IN OPERATOR’S INSTRUCTIONS. VALVES MAY
HYDRAULIC LINE CONNECTION DIAGRAM
(WITH 4 STRAIGHT-ACTING JACKS)
625/725 SERIES LEVELING SYSTEM
MANIFOLDS MAY HAVE FOUR (4) LARGE
VALVES OR FOUR (4) SMALL VALVES
BE EQUIPPED WITH VALVE RELEASE NUTS OR
CHECK
shuttle valve and shuttle
NOTE: SOME
MANIFOLDS
ARE EQUIPPED
WITH VELOCITY
LEFT
REAR
valve tube.
VALVES
3000PSI
PRESSURE
SWITCH
PRESSURE
HERE
ASSEMBLY
VELOCITY VALVE
PUMP/MANIFOLD
LR
LF
RF
RR
LARGE AND
SMALL VALVES
WITH RELEASE
NOTE: Load center is
not shown, load center
may need to be removed
to be removed to access
LEFT
FRONT
NUTS
BEFORE OPERATING MANUAL
BREATHER
CAP
RELEASE CAMS.
NOTE:
RIGHT
REAR
MP64.3917
07JUN11
CHECK
SHUTTLE
VALVE
PRESSURE
SWITCH
VALVES (4)
50PSI
PRESSURE
ALTERNATE
LOCATION
3000 PSI
SWITCH
OUTER
LARGE AND
SMALL VALVES
WITH RELEASE
CAMS
RIGHT
FRONT
MP84.3240
PUMP RELAY
8600 - (BLACK)
CONTROL
#9
MASTER
RELAY (A)
TO
BATTERY
+12 VOLT
6230 (RELAY GND)
#4
#2
MASTER RELAY
8500 (BLACK)
CONTROL
#3
#1
FUSE
40 AMP
RELAY (B)
PUMP
6230 (RELAY GND)
PUMP
MOTOR
+
6800
#5
#8
#7
#6
SIDE VIEW
MP84.3240
07JUN11
POWER UNIT
GROUND STUD
I/O MODULE
SEE DETAIL (A)
MULTIPLEX
MULTIPLEX I/O MODULE
SEE DETAIL (A)
ELECTRICAL CONNECTION DIAGRAM
LEVELING SYSTEM HYDRAULIC MANIFOLD
PUMP AND MASTER RELAYS
TO GROUND STUD
MULTIPLEX I/O MODULE
1400
DETAIL (A) - TOP VIEW
ON PUMP (6230)
B
A
BA
6230
6230
4400
3000 LB
PRESSURE
SWITCH
8100
BA
6230
3400
BA
6230
2400
LR
A
B
LR
P.E.D
P.E.D
A
B
B
A
LF
RF
A
B
RR
LF
RR
50 LB
PRESSURE
SWITCH
P.E.D
P.E.D
RF
8101
MASTER
RELAY (A)
SHOWN HERE BENEATH THE
GROUND STUD IN MANIFOLD
DEUTSCH CONNECTOR
SYSTEM
SINGLE STEP LEVELING
DIAGRAM - 725 SERIES
SEE ELECTRICAL CONNECTION
PUMP
MOTOR
PUMP
POWER UNIT
TOP VIEW
RELAY (B)
MP84.3240
RELAY (B)
PUMP
FUSE
40 AMP
MASTER RELAY
8500 (BLACK)
CONTROL
6230 (RELAY GND)
TO
BATTERY
+12 VOLT
MASTER
RELAY (A)
#4
#3
#1
#2
6230 (RELAY GND)
+
#9
PUMP
MOTOR
#5
#8
#7
6800
MULTIPLEX
SEE DETAIL (A)
I/O MODULE
MP84.3240
07JUN11
SIDE VIEW
POWER UNIT
GROUND STUD
8600 - (BLACK)
PUMP RELAY
CONTROL
#6
8101
B
RR
ELECTRICAL CONNECTION DIAGRAM
LEVELING SYSTEM HYDRAULIC MANIFOLD
PUMP AND MASTER RELAYS
8100
ON PUMP (6230)
DETAIL (A) - TOP VIEW
TO GROUND STUD
MULTIPLEX I/O MODULE
1400
B
A
BA
6230
6230
4400
SWITCH
BA
6230
3400
BA
6230
2400
3000 LB
PRESSURE
P.E.D
P.E.D
A
B
LR
A
B
B
A
LF
RF
LR
LF
P.E.D
P.E.D
RR
RF
50 LB
PRESSURE
SWITCH
PUMP
POWER UNIT
TOP VIEW
RELAY (B)
SHOWN HERE BENEATH THE
GROUND STUD IN MANIFOLD
SINGLE STEP LEVELING
DIAGRAM - 725 SERIES
SEE ELECTRICAL CONNECTION
DEUTSCH CONNECTOR
A
SYSTEM
MASTER
RELAY (A)
MOTOR
MULTIPLEX I/O MODULE
SEE DETAIL (A)
PUMP
PUMP AND MASTER RELAYS
LEVELING SYSTEM HYDRAULIC MANIFOLD
ELECTRICAL CONNECTION DIAGRAM
8101
TO GROUND STUD
ON PUMP (6230)
8100
4400
6230
6230
A
B
A
B
1400
PRESSURE
SWITCH
2400
6230
A
B
3400
6230
A
B
3000 LB
P.E.D
P.E.D
LR
LF
P.E.D
P.E.D
RR
RF
SWITCH
PRESSURE
50 LB
SEE ELECTRICAL CONNECTION
DIAGRAM - 725 SERIES
SINGLE STEP LEVELING
GROUND STUD IN MANIFOLD
SHOWN HERE BENEATH THE
RELAY (B)
TOP VIEW
POWER UNIT
PUMP
DEUTSCH CONNECTOR
SYSTEM
RELAY (A)
MASTER
SEE DETAIL (A)
MULTIPLEX I/O MODULE
MOTOR
PUMP
MP84.3240
BE EQUIPPED WITH VALVE RELEASE NUTS OR
VALVES OR FOUR (4) SMALL VALVES
MANIFOLDS MAY HAVE FOUR (4) LARGE
VELOCITY VALVE
BREATHER
625/725 SERIES LEVELING SYSTEM
ASSEMBLY
PUMP/MANIFOLD
(WITH 4 STRAIGHT-ACTING JACKS)
HYDRAULIC LINE CONNECTION DIAGRAM
IN OPERATOR’S INSTRUCTIONS. VALVES MAY
PROCEDURE FOR MANUAL JACK RETRACTION
VALVE RELEASE, READ AND UNDERSTAND
BEFORE OPERATING MANUAL
valve tube.
REAR
LEFT
WITH VELOCITY
ARE EQUIPPED
MANIFOLDS
NOTE: SOME
SWITCH
PRESSURE
3000PSI
HERE
VALVES
LR
LF
shuttle valve and shuttle
to be removed to access
may need to be removed
not shown, load center
NOTE: Load center is
FRONT
LEFT
NOTE:
WITH RELEASE
SMALL VALVES
LARGE AND
RELEASE CAMS.
CHECK
PRESSURE
NUTS
CAP
VALVES (4)
LOCATION
SWITCH
ALTERNATE
3000 PSI
PRESSURE
RF
RR
SWITCH
PRESSURE
VALVE
SHUTTLE
50PSI
11JUL11
MP64.3917
RIGHT
REAR
WITH RELEASE
SMALL VALVES
LARGE AND
CAMS
OUTER
CHECK
FRONT
RIGHT
MP64.3917
