11921 Slauson
A
ve. Santa Fe Springs, CA. 90670 (800) 227-41
16 F
AX (888) 771-7713
PAGE 42
PLATFORM RAISES PARTIALLY AND STOPS
1. Lower the opened Platform to the ground. Fill the Pump Reservoir on Gravity-Down
Liftgates to within 1/2” below the top with hydraulic fluid recommended in Periodic
Maintenance Checklist.
2. Use voltmeter to verify that the Battery shows 12.6 volts or more.
3. Check for Structural damage, or poor lubrication. Replace worn parts.
4. Check the Hydraulic Cylinder. With the Platform on the ground, remove the Breather Plug or
Vent Line from the Vent Port of the Cylinder
(FIG. 3)
. Raise the Platform even with the bed.
Allow pump motor to run two seconds more while you watch for hydraulic fluid at the Vent
Port. A few drops of hydraulic fluid escaping the Vent Port is normal; however, if it streams
from the Vent Port, Piston Seals are worn. Replace Seals.
5. Check Filter in the Pump Reservoir. Replace filter if necessary.
6. Check for dirty pump motor relief valve. Clean if necessary. Replace any worn out relief
valve parts.
NOTE:
In most cases, you can avoid having to bleed the hydraulic system by correctly
positioning Liftgate Platform before opening hydraulic lines. Refer to following procedure.
Save time on the job and prevent accidental fluid spills and hazards.
Keep dirt, water and other contaminants from entering the hydraulic system. Before
opening the hydraulic fluid reservoir filler cap, drain plug and hydraulic lines, clean up
contaminants that can get in the openings. Also, protect the openings from accidental
contamination during maintenance.
CAUTION
