Maxon MXT-25, Руководство по обслуживанию

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1
1921 Slauson
A
ve. Santa Fe Springs, CA. 90670 (800) 227-41
16 F
AX (888) 771-7713
53
CHECKING SOLENOID VALVE
FIG. 53-3
REMOVING “S1” SOLENOID VALVE
(GRAVITY DOWN POWER UNIT) FIG.
53-1
VALVE CARTRIDGE
1/8”
5.
Check the hydraulic cylinder. With the plat-
form at vehicle fl oor level, remove the hy-
draulic line from the
LOWER
port on the cyl-
inder
(FIG. 53-4)
. Hold the control switch in
the “
RAISE
” 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.
FIG. 53-4
LOWER PORT
RAISE PORT
REMOVING “S1” SOLENOID VALVE
(POWER DOWN POWER UNIT)
FIG. 53-2
NUT
COIL
VALVE
CARTRIDGE
4.
Make sure platform is on the ground. Remove
“S1”
lowering solenoid valve
(FIGS. 53-1 and 53-2)
.
Push on the plunger in the valve by inserting small
screwdriver in the open end
(FIG. 53-3)
. If the
plunger does not move with a smooth, spring-load-
ed action (approximately 1/8”), replace the valve
cartridge.
Reinstall lowering solenoid valve.
Torque valve cartridge to 25-30 lb-ft and hex
nut to 15-45 lb-in (TABLE 40-1)
.
NUT
COIL
VALVE
CARTRIDGE
NOTE:
In most cases, you can avoid having
to manually bleed hydraulic system by
correctly positioning Liftgate platform
before disconnecting any lifting cylin-
der high pressure hydraulic lines.
Keep dirt, water and other contaminants
from entering the hydraulic system. Before
opening the hydraulic fl uid reservoir fi ller
cap, drain plug and hydraulic lines, clean
up contaminants that can get in the open-
ings. Also, protect the openings from acci-
dental contamination during maintenance.
CAUTION