Maxon MTB 72-25C, Руководство по обслуживанию

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11921 Slauson
A
ve. Santa Fe Springs, CA. 90670 (800) 227-41
16 F
AX (888) 771-7713
PAGE 43
LIFTGATE WILL NOT LIFT RATED CAPACITY
1. Use voltmeter to verify that the Battery shows 12.6 volts or more under load from pump
motor.
2. Check for Structural damage or lack of lubrication.Replace worn parts.
PRESSURE
PORT
VENT PORT
FIG. 4
PRESSURE
GAUGE
RELIEF
VALVE
ADJUST
SCREW
FIG. 5
!!!!!
Keep dirt, water and other contaminants from entering the hydraulic system. Before
opening the hydraulic fluid reservoir filler cap, drain plug and hydraulic lines, clean up
contaminants that can get in the openings. Also, protect the openings from accidental
contamination during maintenance.
NOTE: In most cases, you can avoid having to bleed the hydraulic system by correctly
positioning Liftgate Platform before opening hydraulic lines. Refer to following procedure.
Save time on the job and prevent accidental fluid spills and hazards.
3. With Platform on the ground, remove the pressure
hose and fitting from the Pump and replace it with a 0-
3000 PSI Pressure Gauge. Hold the switch in the “UP”
position. Adjust the Relief Valve on the side of the
Pump until the gauge shows 2800 to 3000 PSI
(FIG. 5) .
Remove guage and re-install pressure hose.
4. Check for dirty pump motor relief valve. Clean if
necessary. Replace any worn out relief valve parts.
5. Check the Hydraulic Cylinder. With the Platform on the
ground, remove the Breather Plug or Vent Line from
the Vent Port of the Cylinder
(FIG. 4) . Raise the
Platform even with the bed. Allow pump motor to run
two seconds more while you watch for hydraulic fluid
at the Vent Port. A few drops of hydraulic fluid escap-
ing the Vent Port is normal; however, if it streams from
the Vent Port, Piston Seals are worn. Replace Seals.
6. If Pump cannot produce 2800-3000 PSI with a mini-
mum of 12.6 Volts available, the Pump is worn and
needs to be replaced.
CAUTION