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TM 5-2420-222-34
16-3
HYDRAULIC EARTH DRILL BORING HEAD REPAIR (Con’t).
11.
Remove seal (25) from housing (7). Discard seal.
12.
Using arbor press, remove shaft (19) from housing (7).
13.
Using arbor press, remove pinion (18), cup (21), and cone (20) from shaft (19). Remove cone from cup.
14.
Remove spacer (22) and shims (23) from shaft (19). Note quantity of shims for proper placement during
assembly.
15.
Remove seal (24) from housing (7). Discard seal.
b.
CLEANING AND INSPECTION
WARNING
Dry cleaning solvent, P-D-680, Is toxic and flammable. Always wear protective
goggles and gloves, and use only In a well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open flame
or excessive heat. The solvent's flash point Is 100°F-138°F (38°C-59°C). If you
become dizzy while using cleaning solvent, immediately get fresh air and medical
help. If solvent contacts eyes, Immediately wash your eyes and get medical aid.
1.
Clean housing and cover with dry cleaning solvent and clean rags. Dry thoroughly with clean, dry rags.
2.
Clean all other metal parts with dry cleaning solvent. Dry thoroughly with clean, dry rags.
3.
Inspect gears and pinion for cracks, breaks, and damaged teeth and splines.
4.
Inspect all other metal parts for cracks, breaks, and abnormal bends.
5.
Inspect all threaded parts for damaged threads.
6.
Inspect cups and cones (see TM 9-214).
TA701665
16-13
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