MCCOY KT5500 - 6.4 FAILURE OR DIFFICULTY OF TONG TO SHIFT; 6.5 GENERAL COMMENTS

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80-0420-23 POWER TONG

Manual № TM12012

Section 6

Page 6.5

Troubleshooting

6.4 FAILURE OR DIFFICULTY OF TONG TO SHIFT

POSSIBLE PROBLEM SOLUTION(S)

1 Bent or broken shifter yoke

Inspect components through inspection door. Replace shifter yoke if

necessary.

2 Bent or broken shifter shaft Replace shifting shaft.

Locking nuts on shifting shaft have loosened

and position of yoke has changed

Reposition yoke and re-tighten locking set screws.

4 Shifting yoke has come loose from shifting shaft

Inspect yoke and inspect for damage. If free of damage, replace on

shaft and tighten locking nuts

5 Shifting mechanism requires adjustment Adjust shifting mechanism - see Section 5.6.4

6.5 GENERAL COMMENTS

The following factors generally contribute to poor hydraulic operation and premature wear of equipment:

1. Contaminated hydraulic fluid due to overuse, overheating, or inadequate fluid filtration.

2. Unsuitable hydraulic fluid, especially in extreme climatic conditions.

3. Defective packing or seals in components of the hydraulic system.

4. Poor or incomplete hydraulic system training. Users must be fully qualified to operate the equipment, and have

complete understanding of the hydraulic system.

If your hydraulic troubleshooting procedures involve flow and pressure tests at the power unit, McCoy Global recommends

construction of a test rig that can easily be connected to the main suction and discharge ports of the power unit.