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29
NUT
COIL
VAL
VE
CARTRIDGE
REMOVING SOLENOID VALVE
FIG. 29-1
CHECKING SOLENOID VAL
VE
FIG. 29-2
CHECKING SOLENOID VALVE
FIG. 29-3
2. Make sure platform is on the ground. Remove
lowering solenoid valve (FIG. 29-1). Push on
the plunger in the valve by inserting small
screwdriver in the open end (FIG. 29-2). If the
plunger does not move with a smooth, spring-
loaded action (approximately 1/8”), replace
the valve cartridge. Reinstall lowering valve.
Torque valve cartridge to 30 lbs.-ft. and
hex nut to 30 lbs.-in.
3. Check the hydraulic cylinder. With platform at
vehicle ! oor level, remove the hydraulic line
from the RELIEF port on the cylinder (FIG.
29-3). Hold the control switch in the RAISE
position for two seconds while you watch for
hydraulic ! uid at the RELIEF port. A few drops
of hydraulic ! uid escaping the port is normal.
However, if ! uid streams out, piston seals are
worn, Replace seals.
Keep dirt, water and other contaminants from entering the hydraulic system.
Before opening the hydraulic !
uid reservoir " ller cap, drain plug and hydrau-
lic lines, clean up contaminants that can get in the openings. Also, protect the
openings from accidental contamination during maintenance.
CAUTION
VALVE
CARTRIDGE
RELIEF
PORT
1/8”
RAISE
PORT
CYLINDER
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