11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713
43
4. Make sure platform is on the ground. Remove
cartridge for solenoid valve S1 (FIGS. 43-1
and 43-2). Push on the plunger in the valve
by inserting small screwdriver in the open end
(FIG. 43-3). If the plunger does not move with
a smooth, spring-loaded action (approximately
1/8”), replace the valve cartridge. Reinstall
cartridge and coil for valve S1. Torque
valve cartridge to 25 - 30 lb-in and coil nut
to 15 - 45 lb-in.
CHECKING SOLENOID VALVE
FIG. 43-3
Keep dirt, water and other contaminants
from entering the hydraulic system. Be-
fore opening the hydraulic fl uid reservoir
fi ller 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
REMOVING SOLENOID VALVE
(GRAVITY DOWN POWER UNIT)
FIG. 43-1
VALVE CARTRIDGE
1/8”
5. Check the hydraulic cylinders. With the platform
at vehicle fl oor level, remove the line from the
LOWER port on the cylinder (FIG. 43-4). Hold
the control switch in the “UP” position for two
seconds while you watch for hydraulic fl uid at
the LOWER port. A few drops of hydraulic fl uid
escaping the port is normal. However, if fl uid
streams out, piston seals are worn. Replace
seals or cylinders.
FIG. 43-4
LOWER PORT
RAISE PORT
REMOVING SOLENOID VALVE
(POWER DOWN POWER UNIT)
FIG. 43-2
VALVE S1
CARTRIDGE
COIL
NUT
COIL
NUT
VALVE S1
CARTRIDGE
To Next Page
Loading...
