11921 Slauson
A
ve. Santa Fe Springs, CA. 90670 (800) 227-41
16 F
AX (888) 771-7713
PAGE 41
PLATFORM RAISES BUT LEAKS DOWN
1. Check if Solenoid Valves are constantly energized by touch-
ing a screwdriver to the top nut of the Solenoid
(FIG. 1)
. Try
pulling the screwdriver away from the solenoid. If the solenoid
nut attracts the screwdriver (magnetically) without pushing the
toggle switch, the control circuit is operating incorrectly.
Check if toggle switch, wiring or coil are faulty.
2. Check the Valve Stem by removing the Coil Assembly
(Item 1, FIG. 2)
. With platform on
ground, unscrew the Valve Stem,
(Item 2, FIG. 2)
from the Pump. Push on the plunger that is
located inside the Valve Stem by inserting a paper clip in the end. If the Plunger does not
move freely (approximately 1/8”) replace the Valve Stem.
When re-installing valve stem,
torque hex nut to 30 lbs-in.
3. 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 escap-
ing the Vent Port is normal; however, if it streams from
the Vent Port, Piston Seals are worn. Replace Seals.
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.
PRESSURE
PORT
VENT PORT
FIG. 3
FIG. 2
COIL
FIG. 1
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.
CAUTION
2
1/8”
1
