Harrington Hoists and Cranes TCR Hoist - (1/4-6 Ton) - Manual (Page 44)

44
8.0 Troubleshooting
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HAZARDOUS AIR PRESSURE IS PRESENT IN THE HOIST, IN THE SUPPLY OF COMPRESSED AIR TO
THE HOIST, AND IN CONNECTIONS BETWEEN COMPONENTS.
Before performing ANY maintenance on the equipment, de-energize the supply of compressed air to the
equipment, and lock and tag the supply device in the de-energized position. Refer to ANSI Z244.1, “Personnel
Protection - Lockout/Tagout of Energy Sources.”
Only Trained and competent personnel should inspect and repair this equipment.
Table 8-1 Troubleshooting Guide
Symptom Cause Remedy
Does not operate
Lack of air pressure or loss of air
supply.
Repair or adjust air supply or filters.
Seizure of Main Spool, Brake Spool,
or Air Motor.
Repair at service facility.
Seizure of brake or brake
mechanism fails to release.
Repair at service facility.
Bending or crimping of pendant hose
or control tubes Correct or repair bend or crimp in hose
and/or tubes
Air leak between the two chambers
in the Top Cover
Correct or repair to eliminate air leak.
Hoist is overloaded.
Reduce the load to the rated capacity
of hoist.
Lifting speed is slow
Low air pressure at hoist inlet port.
Repair or adjust air supply or filters.
Check for air line obstruction.
Air supply hose or piping is too small.
Replace hose or piping sizes with
recommended sizes in
Section 3.0 .
Malfunction of brake. Repair at service facility.
Bending or crimping of pendant
hoses or control tubes Correct or repair the bend or crimp in
hose and/or control tubes
Lack of sufficient oil in air supply to
hoist
Increase oil in air supply to hoist in
accordance with requirements in
Section 3.0 .
Exhaust Silencer or Nylon Silencer
clogged
Clean or replace.
Air flow capacity of compressed air
system insufficient
Increase air flow capacity of
compressed air system to
requirements in
Section 2.0 .
Air motor vanes or bearings worn Repair at service facility.
Air supply to hoist contains dirt or
debris
Filter the air supply to the hoist in
accordance with the requirements in
Section 3.0 .
Air leak between the two chambers
in the Top Cover
Correct or repair to eliminate air leak.