EPA07/10 DD PLATFORM WORKSHOP MANUAL - ENGINE
15.6 INSTALLATION OF PISTON AND CONNECTING ROD ASSEMBLY
Install as follows:
1. If the rings have been removed, install them into the grooves of the piston and rotate
120° apart as follows:
[a] Install the oil ring expander in the lowest groove in the piston.
[b] Install the oil ring (top label up) in the lowest groove around the oil expander ring.
[c] Install the compression ring (top label up) in the middle groove.
[d] Install the
fi
re ring (top label up) in the top groove.
2. Allowable new ring end gaps for (A), (B), and (C) are shown below.
Ring
Ring End Gap
Fire Ring (A)
0.35 - 0.75 mm (0.024 - 0.030 in.)
Compression Ring (B)
0.7 - 0.9 mm (0.027 - 0.035 in.)
Oil Control Ring (C)
0.4 - 0.6 mm (0.016 - 0.024 in.)
Table 15-1
Allowable Ring End Gaps
3. Add clean engine oil to a clean pan at least 305 mm (12 in) in diameter, until the level
reaches approximately 76 mm (3 in).
4. Place the piston and connecting rod assembly into the pan, with the combustion dome of
the piston on the bottom of the pan.
5. Coat the upper connecting rod bearing shell with clean engine oil.
All information subject to change without notice.
DDC-SVC-MAN-0081 2010
Copyright © 2010 DETROIT DIESEL CORPORATION
15-11
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