TM 5-3820-241-34
b. Disassembly.
NOTE
When disassembling the drill engine,
always keep the working area clean. Clean
all disassembled parts and place the small
items in a box to prevent loss. Handle
parts carefully; they may be chipped or
broken if dropped on a hard surface.
(1) Clamp the drill securely to a clean bench.
(2) Disassemble the drifter drill assembly in
numerical sequence as illustrated in figure 5-8.
Legend for Fig. 5-8:
1 Striking bar retainer
14 Spring retainer
2 Swivel bushing
15 Back head spring
3 Air and water swivel
16 O-ring
4 Air inlet swivel
17 Plunger
5 Gland plug
18 O-ring
6 Air tube
19 Pin
7 Air tube packing
20 Rotation release ring
8 Hose connector
21 Rifle bar
9 Plain hex nut
22 Rifle bar O-ring
10 Side rod
23 Ratchet pawl
11 Back head assembly
24 Pawl plunger
12 Jam nut
25 Pawl spring
13 Back head adjusting screw 26 Ratchet ring
27 Support ring
28 Chuck housing
29 Rotating chuck
30 Locating pin
31 Valve block cover
32 Outside valve
33 Valve block
34 Valve seat assembly
35 Valve seat
36 Spacer bushing
37 Inside valve
38 Cylinder and buffer ring
39 Cylinder assembly
40 Buffer ring assembly
41 Piston
42 Rifle nut
43 Thrust plate
44 Support ring
45 Chuck assembly
46 Chuck bushing
47 Locating pin
48 Retainer bushing
49 Yoke
50 Counter gear assembly
51 Socket head capscrew
5 2 L o c k n u t
53 Lockwasher
54 Spring
55 Back-up friction plate
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
Clutch gear
Friction plate
Friction back-up plate
Gear hub assembly
Self locking nut
Hex head capscrew
Lockwasher
Motor cap
Motor cap vented plug
Spring pin
Shaft
Spring pin
Spring
Vane motor cover assembly
Bearing
Hose nipple
Bandit hose nipple
Hose nipple
Motor cover
Bearing support
Bearing retaining ring
Needle bearing
Stator
Packing
Rotor and pinion
Rotor vane
Cap
Motor cover stud
5-12
