TM 5-3820-241-34
(1) Reassemble the feed and feed chain
Legend for Fig. 5-14:
mechanism in the reverse of numerical sequence
1 Feed chain assembly
23
Connector
2 Roller line
as illustrated in figure 5-14.
21
Hex head capscrew
3 Connecting link
25
Self locking nut
(2) Install the feed transmission (para 5-8).
26
Machine bolt
4 Off-set link
(3) Install the drifter drill engine (para 5-12).
27
Spring
5 Lubrication fitting
(4) Refer to TM 5-3820-241-12 and install the
6 Lubrication fitting
28
Bushing
rock drill feed assembly, centralizer and the feed
29
Centralizer half
7 Lubrication fitting
8 Spring pin
30
Centralizer half
control valve.
9 Pin
31
Bushing
(5) Refer to LO 5-3820-241-12 and service
32
Plain hex nut
10 Plain hex nut
the rock drill.
11 Adjusting yoke
33
Lockwasher
12 Spring pin
34
Machine bolt
5-21. Boom Pivot Mechanism, Removal and
13 Pin
35
Plain hex nut
Disassembly
14 Plain hex nut
36
Lockwasher
a. Removal.
15 Lockwasher
37
Hex head capscrew
16 Flex head capscrew
(1) Refer to TM 5-3820-241-12 and remove
38
Manifold
17 Bushing
39
Plain hex nut
the rock drill feed assembly.
18 Sprocket
40
Lockwasher
(2) Remove the feed tilt cylinder (para 3-2).
19 Snap ring
41
Hex head capscrew
(3) Remove the boom lift cylinder (para 3-5).
42
Bracket
20 Oil seal
(4) Remove the feed swing cylinder (para 3.
43
Hex head capscrew
21 Bearing
22 Snap ring
44
Hex head capscrew
8).
(5) Remove the boom swing cylinder (para 3-
5-19. Feed and Feed Chain, Cleaning, Inspection
11).
and Repair
(6) Remove the feed extension cylinder (para
a. Cleaning. Clean all parts in cleaning solvent
(FED SPEC PD 680) and dry thoroughly.
(7) Remove the tilt and swing boom
b. Inspection and Repair.
assembly (para 2-11).
(1) Inspect t h e c h a i n a n d c h a i n d r i v e
b. Disassembly.
sprockets for cracks, breaks or excessive wear.
(1) Disassemble the boom tilt and swing
(2) Inspect all bushings and bearings for
mechanism in numerical sequence as illustrated in
rough spots or excessive wear.
(3) Inspect a l l h a r d w a r e f o r damaged
threads. Replace defective hardware.
(4) Repair by replacement of defective parts.
5-20. Feed and Feed Chain, Reassembly and
Installation
a. Reassembly.
5-21