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TM 5-2420-222-34
16-2.
HYDRAULIC EARTH DRILL BORING HEAD MOTOR 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
•
Rags (Item 28, Appendix B)
paragraph 16-1).
•
Dry cleaning solvent (Item 31, Appendix B)
Tools/Test Equipment:
•
Two preformed packings
•
General mechanic's tool kit
General Safety Instructions:
•
Field automotive shop set
•
Dry cleaning solvent is flammable and must not
be used near open flame. Use only in a well-
ventilated area.
a.
DISASSEMBLY
NOTE
Match-mark housings to ensure proper assembly of hydraulic earth drill boring
head motor.
1.
Remove four bolts (7) and washers (6) from top housing (5).
NOTE
Six keys may fall out when removing top housing.
2.
Remove top housing (5) from center housing (1). Remove six keys (4) from spacer (3).
3
Remove preformed packing (9) from center housing (1). Discard preformed packing.
TA701659
16-6
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