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TM 10-3930-638-24&P
4-2. ENGINE MAINTENANCE (cont)
f. Pistons and Connecting Rods.
This task covers repair and replacement of pistons and connecting rods consisting of:
a. Removal
b. Disassembly
c. Cleaning
INITIAL SETUP
TOOLS
Piston Ring Expander
Thickness Gage
Plastic Scraper
Wood Dowel, 1 inch diameter
Reamer
Bore Gage, zero to 5 inches
Micrometer, zero to 5 inches
Piston Ring Compressor
Plasti Gage
No. 1 Common Organiza-
tional Maintenance Tool Kit
Sleeve, 1-5/16 inches diameter
Groove Cleaning Tool
MATERIALS/PARTS
Capscrew, 1/2-13 UNC,
grade 5, 1-1/4 inches long
Flat washer, 9/16 inch ID,
NSN
d. Inspection
e. Reassembly
f. Installation
EQUIPMENT CONDITION
Paragraph
Condition Description
5120-00-221-1999
3-5k
Oil pan removed.
3-5g
Cylinder head assembly removed.
NSN 4910-00-754-0654
FSCM 10988 P/N 13-820
1-3/8 inches OD, 7/64 inch thick
FSCM 10988 P/N 95-8
Cleaning solvent P-D-680
Clean cloths
Oil, No. 30
Piston rings
KEY
1. Connecting rod nuts
2. Connecting rod cap
3. Connecting rod
4. Piston
5. Top piston ring
6. Second piston ring
7. Piston oil ring
8. Retaining rings
9. Piston pin
10. Piston pin bushing
11. Screws
12. Bearing liners
4-41
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