Cylinder Block, Liners, Pistons, and Rods
02
030
47
RG,RG34710,132 –19–01NOV00–1/2
Assemble Pistons and Connecting Rods
RG8401 –UN–09DEC97
6125 Piston Crown and Skirt
RG8400A –UN–22MAY98
Assembling Piston and Rod
A—Piston Steel Crown (6125 Engine)
B—Piston Skirt (6125 Engine)
C—Connecting Rod
D—Compression Rings (2 used)
E—Oil Control Ring
NOTE: Piston and liner sets differ between engines. DO
NOT mix piston and liner sets. See parts catalog
for correct applications.
IMPORTANT: Pistons must be installed on same
connecting rods from which they were
removed and NEW piston pin snap
rings must be used.
If a new piston and liner assembly is to
be installed, DO NOT remove piston
from liner. Push piston out of liner
bottom only far enough to install piston
pin.
1. On 6125 engines, assemble piston crown (A) and skirt
(B) so that connecting rod pin bushings are aligned.
2. Lubricate piston pin and bushings with clean engine oil.
NOTE: Pistons are symmetrical; new pistons can be
installed either way. If pistons are being reused,
align front reference mark made during
disassembly with front of connecting rod.
3. Install piston pin through piston and connecting rod
(C).
4. Install NEW piston pin snap rings in grooves. Make
certain snap rings have completely expanded in
grooves of piston. Sharp edge of snap ring MUST face
toward outside of piston.
Continued on next page
CTM100 (06APR04)
02-030-47
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=187
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