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TM 5-2420-222-34
16-3.
HYDRAULIC EARTH DRILL BORING HEAD REPAIR.
This Task Covers:
a.
Disassembly
c.
Repair
b.
Cleaning and Inspection
d.
Assembly
Initial Setup:
Equipment Conditions:
Materials/Parts:
•
Hydraulic earth drill boring head motor removed (see
•
Hydraulic fluid (Item 15, Appendix B)
paragraph 16-1).
•
Grease (Item 22, Appendix B)
•
Rags (Item 28, Appendix B)
Tools/Test Equipment:
•
Dry cleaning solvent (Item 31, Appendix B)
•
General mechanic's tool kit
•
Nonelectrical wire (Item 44, Appendix B)
•
Field automotive shop set
•
Two seals
•
Gaskets (as required)
References:
•
TM 9-214
General Safety Instructions:
•
Dry cleaning solvent is flammable and must not
be used near open flame. Use only In a well-
ventilated area.
a.
DISASSEMBLY
1.
Remove four nuts (6), washers (5), housing (3), and gasket (4) from housing (7) and cover (1). Discard gasket.
2.
Remove two screws (2) from housing (7) and cover (1).
16-11
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