Maxon MTB 72-25C, Руководство по обслуживанию

Страница: 44 / 45

11921 Slauson
A
ve. Santa Fe Springs, CA. 90670 (800) 227-41
16 F
AX (888) 771-7713
PAGE 44
PLATFORM RAISES SLOWLY
TERMINAL
“A”
FIG. 6
FLOW
CONTROL
VALVE
VENT PORT
PRESSURE
PORT
FIG. 8
PRESSURE
GAUGE
RELIEF
VALVE
ADJUST
SCREW
FIG. 7
1. Use voltmeter to verify that power is being supplied to
Solenoid Terminal “A”. Recharge the battery if volt-
meter indicates less than 12.6 Volts
( FIG. 6) .
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.
CAUTION
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.
2. 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. 8) . 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 escaping the Vent Port is normal; however, if it streams
from the Vent Port, Piston Seals are worn. Replace Seals.
3. Check and clean Flow Control Valve in high pressure hydraulic line attached to Cylinder.
When installing Flow Control Valve make sure arrow on valve is oriented as shown
in (FIG. 8) .
4. Lower the opened Platform to the ground. Fill the Pump Reservoir on Gravity-Down
Liftgates to within 1/2” below the top with hydraulic fluid recommended in Periodic
Maintenance Checklist.
5. Verify the Pump Motor is grounded to the vehicle frame.
6. Check for leaking hoses and fittings. Tighten or replace as
required.
7. Check for structural damage or poor lubrication. Replace
worn parts.
8. Check the Filter in the Pump Reservoir. Replace if neces-
sary.
9
. 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 Control switch in the “RAISE”
position. Adjust the Relief Valve on the side of the Pump
until the gauge shows 2800 to 3000 PSI
(FIG. 7) . Remove
guage and re-install pressure hose.