TM 5-4310-379-14
5-20. Pistons and Connecting Rods.
This task covers:
a.
Replace
b.
Repair
INITIAL SETUP
Tools
Materials/Parts
General Mechanic's Tool Kit (NSN 5180-00-177-7033)
Assembly, Piston
Wrench, Torque (NSN 5120-00-247-2540)
Assembly, Rod
Installer and Remover, Piston and Connecting Rod
Rags, Wiping (Item 21, Appendix D)
Bushing (PN J 1513-02)
Solvent, Dry Cleaning (Item 23, Appendix D)
Reamer Set, Connecting Rod Bushing (PN J 1686-D)
Detector, Leak (PN J 2398)
Equipment Condition
Reamer Set, Piston Pin Bushing (PN J 3071-01)
Ball Attachment, Micrometer (PN J 4757)
Cylinder head assembly removed (para. 5-18).
Installer, Piston Pin Retainer (PN J 23762-A)
Oil pan removed (para. 4-14).
Fixture, Piston Bushing Reamer (PN J 5273)
Oil pump removed (para. 4-16).
Set, Feeler Gage (PN J 5438)
Holder, Connecting Rod (PN J 7632)
Assembly Tool, Piston Ring (PN J 8128)
Nozzle Remover, Connecting Rod (PN J 8995)
Piston Ring Compressor (NSN 5120-00-250-6055)
or (PN J 3272-03)
a.
Replace. (figure 5-22)
NOTE
The engine is equipped with two pistons and connecting rods, replacement of each one is the same.
(1)
Remove all carbon deposits from top of piston (1) and cylinder (2).
(2)
Remove two connecting rod bolts (3) and nuts (4) and remove bearing cap (5) and lower bearing shell (6).
(3)
Slide piston (1) with connecting rod (7) out of cylinder (2).
(4)
Remove upper bearing shell (8) from connecting rod (7).
(5)
Install upper bearing shell (8) in connecting rod (7).
(6)
Using suitable ring compressor, install connecting rod (7) with piston (1) in cylinder (2).
(7)
Position connecting rod (7) on crankshaft (9).
(8)
Install lower bearing shell (6) and bearing cap (5) and secure with two connecting bolts (3) and nuts (4). Torque
nuts to 60-70 Ib-ft (81-95 Nm).
5-72
