Maxon RA-35, Maintenance Manual

Page: 29 / 36

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29
NUT
COIL
VALVE
CARTRIDGE
REMOVING SOLENOID VALVE
FIG. 29-1
CHECKING SOLENOID VALVE
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 fl 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 fl uid at the
RELIEF
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.
Keep dirt, water and other contaminants from entering the hydraulic system.
Before opening the hydraulic fl uid reservoir fi 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