TM 5-3805-281-24-2
Cylinder Block, Liners, Pistons, and Rods
4. Insert pin from either side of rod bushing. If pin is free
on one end, but tight on the other, the bore could be
tapered (A). If pin enters freely from both sides, but is
tight in the center, bore is bell-mouthed (B).
5. Measure I.D. of rod pin bushing and O.D. of piston pin.
Compare measurements with specifications given
below:
Piston Pin--Specification
OD ............................................................................. 47.597--47.613 mm
(1.8739--1.8745 in.)
Inspecting Piston Pin Bores
Pin Bore--Specification
ID ............................................................................... 47.620--47.630 mm
(1.8739--1.8745 in.)
Installed Rod Pin Bushing (after Boring)--Specification
ID ............................................................................... 47.655--47.681 mm
(0.0017--0.0033 in.)
Rod Pin-to-Bushing Oil--Specification
Clearance ...................................................................... 0.042--0.084 mm
(0.0017--0.0033 in.)
Wear Limit .............................................................. 0.102 mm (0.0040 in.)
6. If necessary, remove and replace piston pin bushing.
See REMOVE PISTON PIN BUSHING, CLEAN AND
INSPECT PIN BORE, later in this group.
RG,RG34710,1129
1923OCT972/2
11-172
