TM 9-6115-604-34
NAVFAC P-8-633-34
Figure 9-29. Inspection of Connecting Rod Bolt
(14)
Inspect the top and intermediate compression rings (5 and 6, Figure 9-24) and oil control ring (7) as follows:
(a)
It the ring side groove clearance, as measured in step c(l), above, exceeded 0.006 inch (0.15 mm), but the
piston is OK (see step (13)(b), above), replace the rings.
(b)
Insert each ring (5, 6, or 7) individually in its corresponding cylinder liner (27).
(c)
Using the piston (10), push the ring (5, 6, or 7) into the cylinder liner (27) so that it is seated squarely in the
ring travel area of the liner.
(d)
Check the end gap (Figure 9-30) with a feeler gage.
(e)
If the end gap of any ring (5, 6, or 7) is not within specifications shown in Figure 9-30, replace them.
(15)
Inspect the cylinder liners (27, Figure 9-24) in accordance with paragraph 9-23.
(16)
Inspect connecting rod bearing shells (11) in accordance with paragraph 9-21.
(17)
Inspect crankshaft (32) journals in accordance with paragraph 9-21.
f. Assemble and install.
CAUTION
To prevent severe engine damage, and ensure proper Installation, the piston must be
assembled to the connecting rod with the piston part number (on top of the piston) and the
bearing tang locidng groove In the connecting rod on the same side (or the piston and
connecting rod cylinder numbers on the same side). Discard the old snap rings; use new
snap rings only.
NOTE
Piston rings must be replaced in sets only.
(1)
Install a new piston pin snap ring (8, Figure 9-24) in one groove of the piston pin bore. Heat the piston (10) in
boiling water or in an oven at or below 210°F (99°C) for approximately 15 minutes.
(2)
Install the pin (9) through the piston (10) and connecting rod (4) pin bores before the piston cools.
(3)
Secure the piston (10) with a second new snap ring (8) in the groove at the opposite end of the pin bore.
(4)
Install the top and intermediate compression rings (5 and 6), and oil control ring (7) as follows:
9-54
