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TM 5-2420-222-34
16-4.
HYDRAULIC IMPACTOR MOTOR ASSEMBLY REPLACEMENT.
This Task Covers:
a.
Removal
c.
Installation
b.
Cleaning and Inspection
Initial Setup:
Equipment Conditions:
Materials/Parts:
•
Hydraulic impactor lines and fittings removed (see
•
Rags (Item 28, Appendix B)
TM 5 2420-222-20).
•
Dry cleaning solvent (Item 31, Appendix B)
•
Two seals
General Safety Instructions:
Tools/Test Equipment
•
Dry cleaning solvent is flammable and must not
be used near open flame. Use only in a well
•
General mechanic's tool kit
ventilated area.
a.
REMOVAL
1.
Remove four screws (1) from rock drill bit (4) and hydraulic impactor (8).
2.
Remove seal (3), rock drill bit (4), retaining plate (5), and seal (6) from hydraulic impactor (8). Discard seals.
3.
If damaged, remove four bushings (2) and studs (7).
TA701669
16-17
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