Carbine 6850 Manuel de service Page 136

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TM 9-1005-319-23&P 0012
0012-4
INSPECTION — ACCEPTANCE AND REJECTION CRITERIA
1 v s 0 8 5
U N S E R V I C E A B L E
S E R V I C E A B L E
Figure 5. Bolt Face Inspection.
1. Inspect bolt (4) for pits, burrs, and wear as follows:
a. Bolt faces with a cluster of pits which are touching or tightly grouped, covering an area measuring
approximately 1/8 in. (0.32 cm) across, will be rejected and replaced.
b. Bolts which contain individual pits or a scattered pattern will not be rejected.
c. Bolts that contain pits extending into the firing pin hole will not be rejected unless firing pin hole
gaging check determines excess wear.
d. Rings on the bolt face (machine tool marks), grooves, or ridges less than approximately 0.010 in.
(0.025 cm) will not be cause for rejection.
1 v s 0 8 6
4
1 0
9
Figure 6. Inspection for Cracks in Bolt Assembly.
2. Inspect bolt (4) for cracks in locking lugs (10) and bolt cam pin hole (9) area. Use black light if
available; otherwise, use a glass of no more than 3X magnification or use a penetrant kit (WP 0045,
item 27). Pay close attention to the area where the locking lugs meet the body. Replace bolt assembly
if bolt is defective.
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