Harrington-hoists-and-cranes TCR Hoist - (1/4-6 Ton) User Manual download pdf (Page 44)

8.0 Troubleshooting



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.

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Harrington-hoists-and-cranes TCR Hoist - (1/4-6 Ton) User Manual Page 44

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