TM 5-3820-241-34
Legend for Fig. 6-6: (Cont’d)
35 Angle socket
17 Lubrication fitting
36 Spring pin
18 Lubrication fitting
37 Pivot pin
19 Plain hex nut
38 Plain hex nut
20 Lockwasher
39 Lockwasher
21 Hex head capscrew
40 Yoke mounting shaft
22 Plate
41 Lubrication fitting
23 Plain hex nut
42 Yoke
24 Lockwasher
43 Thrust washer
25 Machine bolt
4 4 I d l e r o i l s e a l
26 Equalizer arm
45 Idler
27 Snap ring
46 Bronze idler bearing
28 Bronze bearing
47 Idler spacer shaft
29 Equalizer bar
48 Spring
30 Lubrication fitting
49 Spring cap
31 Snap ring
50 Cap O-ring
32 Bearing
51 Backup leather ring
33 Snap ring
52 Shaft
34 Oil seal
53 Shaft O-ring
(2) Use a suitable press to remove bronze
bearings from track roller (14), equalizer arm (26),
and track idler (45).
6-11. Crawler Side Frame Cleaning Inspection
and Repair
a. Cleaning.
(1) Clean all parts with cleaning solvent,
(FED SPEC PD 680) and dry thoroughly.
(2) Discard and replace all oil seals and O-
rings.
b. Inspection and Repair.
(1) Inspect all bronze bushings for excessive
wear and proper fit on shafts.
(2). Inspect the side frame, equalizer arm,
equalizer bar and idler yokes for cracks breaks or
other damage.
(3) Inspect the idler springs and the idler for
cracks breaks or other damage.
(4) Inspect
all hardware
for damaged
threads.
(5) Repair minor cracks on side frame
equalizer arm and equalizer bar by welding.
(6) Replace defective hardware and other
parts.
6-12. Crawler Side Frame and Equalizer,
Reassembly and Installation
a. Reassembly.
(1) Reassemble the crawler side frame in the
reverse of numerical sequence as illustrated in
figure 6-6.
(2) Use a suitable press to install bronze
bushings in the track rollers (14). equalizer arm
(26) and idler (45).
b. Installation.
(1) Install the equalizer arm and bar as
illustrated in figure 6-5.
(2) Install th e crawler drive side frame as
illustrated in figure 6-4.
(3) Installl the t ramming transmission and
brake housing (para 2-18).
(4) Install the t ramming motor (para 2-14).
(5) Refer to LO 5-3820-241-12 and lubricate
the rock drill.
6-13
