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TM5-4210-224-14&P
6-16.
CONNECTING ROD AND PISTON MAINTENANCE.
This task covers:
a. Removal
b. Inspection
c. Installation
Equipment
Condition
INITIAL SETUP
:
Para.
Condition Description
Tools
Oil Pan Removed
General Mechanics Tool Kit
Cylinder Head Removed
Ring Compressor (J-8037)
Oil Pump Removed
Brass Mallet
General Safety Instructions
Materials/Parts
Engine OFF
Lubricating Oil
Transmission in (N) neutral.
Connecting Rod
(14025523)
Parking brake and micro-brakelock set.
Piston
(23500391)
Lint Free Cloth
REMOVAL
f. Remove the rod and piston assembly through
a. Place a cloth (Appendix D, Item 12) on top of
the top of the cylinder bore.
the piston.
NOTE
b. Use a ridge reamer to remove any ridges or
deposits from the upper end of the cylinder
If connecting rod bearings, are to be
bore.
reused, place them in an organizer rack
so they can be returned to their original
c. Turn the crankshaft until the piston is at the top
locations.
of the stroke and remove the cloth and cuttings.
g. Remove the connecting rod bearings.
d. Remove the connecting rod cap.
INSPECTION
CAUTION
a. Inspect connectin rods for cracks twisting, or
g
Check the connecting rod and cap for
bending. Replace connecting rods if damaged.
identification marks. Mark the parts if
required. The connecting rod and cap
b. Inspect the pistons for cracked ring lands, skirts
must be kept together as mating parts.
or pin bosses, wavy or worn ring lands, scuffed
or damaged skirts, eroded areas at top of piston,
e. Attach two short pieces of 3/8 inch (10 mm)
any other damage or excessive wear. Replace
hose to the connecting rod bolts to protect the
pistons that are damaged or show signs of
crankshaft bearing journal during removal of the
extensive wear.
connecting rod and piston.
6-24
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