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 TM 9-6920-361-13&P
Section III. ORGANIZATIONAL
4-5.
General. This section describes organizational
(1) Remove breech
bolt
group
from
maintenance for the 14.5-mm field artillery trainer M31
barrel receiver (para. 3-9).
and subcaliber devices. Replacement of repair parts will
be limited to those allocated in the maintenance
(2) Disassemble the breech bolt group in
allocation chart (app. B) and repair parts and special
accordance with figure 4-1.
tools list (app. C). For troubleshooting see chapter 3.
b.
Maintenance.
4-6.
Removal
and
Installation
of
Major
Components. The major components of the trainer are
(1) Clean and oil the breech bolt group as
contained in the shipping and storage chest.
If
indicated in the lubrication chart (fig. 3-1) and paragraph
necessary to remove components from assembled
trainer, refer to paragraph 2-6 For assembly, refer to
(2) Remove corrosion, burs, or scored
areas with crocus cloth.
4-7.
Maintenance of Breech Bolt Group.
(3) Replace damaged or broken parts. If
a.
Disassembly (Fig. 4-1).
either the bolt or breech bolt lever is unserviceable, notify
direct support maintenance personnel.
1.
Bolt Screw - 11578612
8.
Extractor - 11578608
2.
Detent Spacer - 11578578
9.
Extractor Spring
3.
Bolt Lever - 11578601
10.
Plunger - 11578609
4.
Firing Pin Spring - 11578613
11.
Spring
5.
Spring Guide - 11578610
12.
Breech Bolt - 11578600
6.
Firing Pin - 11578606
13.
Plunger - 11578611
7.
Extractor Pin - 11578631
14.
Bolt Spring
Figure 4-1. Disassembly/assembly of breech bolt group
4-2
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