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TM 5-2420-222-34
16-1
HYDRAULIC EARTH DRILL BORING HEAD MOTOR REPLACEMENT (Con’t).
8.
Position wheel sprocket (15) and hub (13) in place and install roller chain (7) on wheel sprocket.
9.
Secure wheel sprocket (15) and hub (13) with washer (12), nut (11), and new cotter pin (10).
10.
Install four screws (9) in hub (13) and wheel sprocket (15). Secure screws with lockwire (14) (see paragraph 1-
28).
11.
With the aid of an assistant, slide housing (2) on boring head (1).
12.
While assistant supports housing (2) in place, tighten four nuts (6).
13.
Install new gasket (3) and housing (4) on housing (2) and boring head (1) with 13 bolts (5).
FOLLOW-ON TASKS:
•
Fill hydraulic earth drill boring head (see LO 5-2420-222-12).
•
Install hydraulic earth drill boring head (see TM 5-2420-222-20).
16-5
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