MP24.9740
17JUN09
SECTION III
625/625S SERIES LEVELING SYSTEMS
SYSTEM START-UP AND ADJUSTMENTS
At any time the system will not function, refer to the 625 or 625s
1.) PARK BRAKE CHECK
repair manual in the service manual section of the HWH website.
The park brake circuit must function properly for the leveling system to function properly. The test is different between the 625
system and the 625S single step system. CHOCK THE WHEELS DURING THIS TEST SO THE VEHICLE CAN NOT ROLL
WHEN THE PARK BRAKE IS RELEASED.
625 system park brake test. Turn the ignition switch to the "ACC" position. Make sure the park brake is set. Push the "I" /
"HYD" button. The on light above the button should come on. The "NOT IN PARK / BRAKE" light should not be on. Push on
the foot brake so the vehicle can’t roll, then release the park brake. The "NOT IN PARK / BRAKE" light should come on. With
straight-acting jacks, push any manual UP ARROW. With kick-down jacks, push the "I" / "HYD" button a second time. With
either system, the pump should not run. If the pump runs with the "NOT IN PARK / BRAKE" light on, or if the "NOT IN PARK /
BRAKE" light will not come on with the park brake released, refer to the 625 repair manual.
625S system park brake test. Turn the ignition switch to the "ACC" position. Make sure the park brake is set. Push any
manual UP ARROW, the pump should run. Release the UP ARROW. Push on the foot brake and release the park brake.
Again, push any UP ARROW. The "NOT IN PARK BRAKE" light should come on while pushing the UP ARROW and the
pump should not run. If the pump runs or the "NOT IN PARK / BRAKE" light will not come on with the park brake released,
refer to the 625S repair manual.
2.) HYDRAULIC START-UP
Kick-down jacks. Make sure the ignition is in the "ACC" position and the park brake is set. Push the "I" / "HYD" button one
time. Make sure the ON light is lit. Push the "I"/ "HYD" button a second time. The pump should run. The jacks should try to
swing vertical, starting with the left front jack, then the right front jack, then the right rear jack and finally the left rear jack. The
pump should run no more than 15 to 20 seconds then shut off. The first time the system is run, the jacks may or may not
swing vertical. This is due to the priming of the pump and filling the hydraulic lines. Push the "OFF"/ "EMERGENCY STOP"
button then the "STORE" button. Make sure all jacks have retracted. Repeat the procedure until all four jacks have swung
vertical. After 2 or 3 times at the most, all the jacks should be swinging vertical. The individual red warning lights on the touch
panel should be on when the appropriate jack is in the vertical position. The master warning light should be on if any jack is in
the vertical position. With the jacks fully retracted to the horizontal position, the touch panel warning lights and the master
warning light should be out. Check the reservoir fluid level and fill as needed.
If all of the jacks will not swing vertical, check the hydraulic circuit and the touch panel warning lights. Make sure the
warning lights are off when the jacks are in the horizontal position. With the touch panel on, pull each jack to the vertical
position and make sure the appropriate touch panel warning light comes on. The warning lights must work correctly for
the jacks to swing to the vertical position and for the system to function properly. Make sure the hoses are connected to
the correct fittings.
Chock the tires so the vehicle cannot roll. Push the "I"/ "HYD" button twice to put the jacks in the vertical position. Push
the front UP ARROW to extend the front jacks to the ground and lift the vehicle 1 or 2 inches. Push the rear UP ARROW to
extend the rear jacks to the ground and lift the vehicle 1 or 2 inches. Do not raise the rear of the vehicle high enough to
lift the rear tires off the ground. The vehicle will roll forward or backwards off the jacks if the rear tires leave the
ground. Push the "OFF" / "Emergency Stop" button. Push the "STORE" button. When the jacks have fully retracted
repeat the procedure at least once more. With the jacks retracted to the horizontal position, check the fluid level and
fill as necessary. The system should now be ready to make adjustments and test the automatic function of the system.
Straight-acting jacks; 625 leveling system. Make sure the ignition is in the "ACC" position and the park brake is set. Push
the "I" / "HYD" button one time. Make sure the ON light is lit. Push and release the front UP ARROW at 5 second intervals
until both front jacks reach the ground and lift the vehicle 1 or 2 inches. When the jacks have extended approximately 1 inch,
the front red warning lights on the touch panel should be on. The master warning light should be on. Push and hold the front
DOWN ARROW until both front jacks have fully retracted. The touch panel warning lights should go out. The master warning
light should be out. Check the reservoir fluid level and fill as necessary. Repeat this with the rear up arrow and check the fluid
level and fill as necessary. Repeat the complete procedure at least once more. Now extend the front jacks then with the front
jacks extended, extend the rear jacks. Push the "Store" button and check that all the jacks will fully retract. Check and fill the
reservoir as necessary. The system should now be ready to make adjustments and test the automatic function of the system.
