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D. FINAL ADJUSTMENTS
This section contains procedures that might be needed after lift is installed in vehicle. It is not a requirement
to perform all procedures after lift installation, but only those that are necessary. Additional adjustment
procedures, that would normally be needed after maintenance or repair, are in
Chapter IV.
WARNING!
FAILURE TO PROPERLY ADJUST EQUIPMENT MAY RESULT
IN UNSAFE OPERATING CONDITIONS FOR THE LIFT USER.
1. HYDRAULIC BLEEDING
The fluid in hydraulic system will contain air after installation of lift into vehicle. It may also contain air
as a result of doing maintenance or repairs. The trapped air must be removed by "bleeding" the
hydraulic system.
Two methods are possible. The first is a traditional procedure that requires opening the hydraulic
system. The second procedure is quicker and easier because it does not require any disassembly.
However, the second procedure will not remove air as thoroughly as the first.
a. TYPICAL BLEEDING PROCEDURE
NOTE:
The following procedure should be performed by two people, and may spill hydraulic fluid.
1) Fully deploy lift.
2) Raise platform to floor height, and support.
WARNING!
THE SERVICE ACCESS PANEL IS HINGED ALONG THE REAR EDGE AND SHOULD
BE HELD UP WHILE REMOVING THE RETAINING SCREWS AT THE FRONT EDGE.
THIS WILL PREVENT PANEL FROM FALLING AND CAUSING INJURY OR DAMAGE.
3) To gain access to underside of lift, hold service access panel up, remove the two retaining
screws and lock-nuts near front edge of panel, and then lower panel.
WARNING!
•• WEAR PROTECTIVE CLOTHING AND EYE PROTECTION AT ALL TIMES. BAT-
TERIES CONTAIN ACID THAT CAN BURN. IF ACID COMES INTO CONTACT
WITH SKIN, IMMEDIATELY FLUSH AFFECTED AREA WITH WATER AND WASH
WITH SOAP.
•• ALWAYS WORK IN A PROPERLY VENTILATED AREA. DO NOT SMOKE OR USE
AN OPEN FLAME IN THE VICINITY OF BATTERY.
•• DO NOT LAY ANYTHING METALLIC ON TOP OF BATTERY.
4) Disconnect positive battery (+) cable in vehicle battery compartment.
5) Locate air bleeder valve on top side of hydraulic cylinder (cylinder located in carriage).
Access to this valve is through a hole in the rear carriage frame channel.
6) Remove platform support.
WARNING!
THE FOLLOWING STEP OPENS THE HYDRAULIC BLEEDER
VALVE AND WILL ALLOW THE PLATFORM TO SLOWLY DROP.
NOTE: This step will spill hydraulic fluid; have dry rags on hand.
7) Open bleeder valve slightly.
Let air and hydraulic fluid escape from cylinder.
8) Close air bleeder valve.
9) Manually lower platform to ground.
CAUTION!
Check and add hydraulic fluid when platform is at ground level. Adding fluid
with platform raised will cause oil reservoir to overflow when it is lowered.
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