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TM 5-2420-222-34
16-3
HYDRAULIC EARTH DRILL BORING HEAD REPAIR (Con’t).
3.
Remove eight bolts (8) from housing (7) and cover (1).
4.
Remove cover (1) and gaskets (9) from housing (7).
5.
Using micrometer calipers, measure thickness of each gasket (9). Record quantity and size of each gasket to
ensure proper assembly. Discard gaskets.
6.
Remove shaft (10) with assembled parts from housing (7).
7.
Using arbor press, remove cup (11) and cone (12) from shaft (10). Remove cone from cup.
8.
Cut and remove lockwire (13) from 12 bolts (17). Discard lockwire.
9.
Remove 12 bolts (17) from ring gear (16).
10.
Using arbor press, remove ring gear (16), cup (14), and cone (15) from shaft (10). Remove cone from cup
TA701664
16-12
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