TM 9-6115-604-34
NAVFAC P-8-633-34
(4)
Position the crankshaft (32) at BDC for the connecting rod being removed. If Wi connecting rods are being
removed, start at No. 1 cylinder.
NOTE
Original equipment connecting rods, caps, and pistons are marked 1L through 6L for the left
bank and 1R through 6R for the right bank The numbered side of the piston and rod
assemblies face the inspection holes. A replacement connecting rod or piston could,
however, be unmarked. Be sure all assemblies are properly marked before removal.
Figure 9-25. Inspection of Connecting Rods
(5)
Check for identifying marks on the connecting rod (4) and cap (3). If unmarked, steel-stamp the cylinder number
and bank location on the inspection hole side of both connecting rod (4) and cap (3). Be sure all connecting rods
and caps are marked before removal.
(6)
Loosen the connecting rod bolts (1) approximately 0.5 inch (13 mm) and tap the ends of the bolts alternately with
a plastic mallet until connecting rod cap (3) is free of the dowels (12).
CAUTION
During removal, be careful that the crankshaft journals and cylinder liners are not nicked by
sharp edges on the connecting rod. Because of insufficient clearance between the crankshaft
counter weights, the crankshaft must be turned to allow clearance for removal of the
connecting rod assembles, To avoid crankshaft damage Install nylon guide pins In the
connecting rod and adhere to the following steps carefully.
NOTE
If the connecting rod bearing shells (11) come out of the connecting rod and cap, remove the
bearing shells and tape them together. Mark the bearing shells with a felt pen as to top and
bottom, rod number, and bank location .
(7)
Remove the connecting rod bolts (1), washers (2), and cap (3). Install nylon guide pins 3375098 in the
connecting rod bolt holes.
9-47
