TM 5-3805-281-24-2
Cylinder Block, Liners, Pistons, and Rods
INSPECT PISTON PIN AND BORE
NOTE: Piston pin must be in good condition and not worn
beyond specification given below.
1. Dip piston in clean engine oil.
2. Install pin (A) through piston.
Pin should pass through piston using only light thumb
pressure.
Installing Pin in Piston
3. Check taper in piston pin bore by inserting pin from
both sides. If pin enters freely, but binds in the center,
the bore could be tapered (B).
4. Insert pin in piston to check for bore alignment. Pin
should not "click" or need to be forced into bore on
opposite side (C).
5. Measure piston pin and piston bore specifications. If
either are not within specification, replace pin, piston,
and liner.
Piston Pin--Specification
Inspecting for Piston Pin Bore Wear
OD ................................................................................. 47.60--47.61 mm
(1.8739--1.8745 in.)
Piston Bore--Specification
ID ................................................................................... 47.62--47.63 mm
(1.8748--1.8752 in.)
RG,RG34710,1122
1923OCT971/1