Anthony Liftgates MTU-GLR Series, Руководство по обслуживанию

Страница: 21 / 24

MTU-GLR Maintenance
21
Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
Troubleshooting Chart
Problem Possible Causes Possible Solution
Motor runs, but liftgate will not open or
lower to the ground.
Structural damage. Check clearance
between platform and dock bumpers.
Fix damage. Replace worn parts.
Latch pin. Slide the latch pin to the open position.
Lowering valve solenoid. Check the solenoid. “4.8 Checking
Lowering Valve Cartridge and Solenoid”
on page 13.
Lowering valve cartridge. Check, remove, and clean valve
cartridge using the procedure in the
Maintenance section. “4.8 Checking
Lowering Valve Cartridge and Solenoid”
on page 13.
Flow control valve. Remove flow control valve and hook
hydraulic hose directly to the cylinder.
If the cylinder operates properly, replace
the valve. “4.13 Checking Flow Control
Valve” on page 14.
Motor runs, but platform will not raise,
will not raise rated capacity, or raises
but drifts down when control switch is
released.
Load capacity has been exceeded. Verify load capacity and adjust load
weight.
Structural damage. Replace damaged parts.
Low fluid level. Fill reservoir. “4.1 Monthly Inspection”
on page 10.
Low Voltage. Inspect the battery connection
terminals and check the battery’s
Voltage (9 Volts minimum).
Faulty lowering valve. Solenoid or cartridge may need cleaning
or replacement. See Maintenance
section. “4.8 Checking Lowering Valve
Cartridge and Solenoid” on page 13.
Defective piston seals. See Maintenance section for Checking
Cylinder for Leakage. “4.11 Checking
Cylinder Piston Seals (drifting - caused
by seal leakage)” on page 14.
Hydraulic pump is worn. Replace hydraulic pump.
Latch pin is broken or bent. Operator has lowered platform without
releasing latch pin.
The latch pin is only used to prevent the
liftgate from opening due to a pressure
leak or pressure bleed-off over an
extended period of time. Always release
latch before opening liftgate.
Liftgate raises truck when lowered to
the ground.
Power down system pressure is set too
high.
See Maintenance section for Checking
System Pressure. “4.12 Checking System
Pressure” on page 14.
Liftgate will not open. Platform operating area is not clear. Clear platform operating area.
Latch pin will not slide freely to release
liftgate.
Activate the “UP” switch and raise the
liftgate to the fully stored position.
The latch pin should slide freely.