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
46
PLATFORM RAISES PARTIALLY AND STOPS
1.
Lower the opened platform to the ground. Do the
CHECKING HYDRAULIC FLUID
procedure in
this manual. If necessary, add hydraulic fl uid.
2.
Use voltmeter to verify the battery voltage, under
load from pump motor, is a minimum 10.5 volts
DC, or 21 volts DC for a 24 volt system, .
3.
Check for structural damage and poor lubrication.
Replace worn parts.
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
cylinder
(FIG. 46-3)
. 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.
6.
Check pump oil fi lter in the reservoir
(FIGS. 46-1 and 46-2)
. Clean or re-
place fi lter, if necessary.
4.
Check for dirty 2750 psi relief valve
(FIGS. 46-1 and 46-2)
. Clean or replace
2750 psi relief valve, if necessary.
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
FIG. 46-3
LOWER PORT
RAISE PORT
RELIEF
VALVE
ADJUSTMENT
COVER
CHECKING 2750 PSI RELIEF VALVE
(GRAVITY DOWN POWER UNIT)
FIG. 46-1
RESERVOIR
(PUMP OIL FILTER INSIDE)
RELIEF
VALVE
ADJUSTMENT
COVER
RESERVOIR
(PUMP OIL FILTER INSIDE)
CHECKING 2750 PSI RELIEF VALVE
(POWER DOWN POWER UNIT)
FIG. 46-2
NOTE:
In most cases, you can avoid having to
manually bleed hydraulic system by
correctly positioning Liftgate platform
before disconnecting any lifting cylinder
high pressure hydraulic lines.