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 TM 55-1905-217-34
NOTE
When attaching the pump outlet and the pressure regulator, none of the bolts should be tightened
until all the bolts have been started. After all bolts are started, the outlet pipe bolts (33) should be
tightened alternately, then the pressure regulator bolts (15) should be tightened, and finally the pipe-
to-regulator bolts (29) should be secured. This procedure prevents twisting the outlet pipe.
(4) Attach the pump screen brackets (3) to the main bearing caps with lock washers and bolts (2). Do not tighten the bolts.
(5) Affix a new gasket (46) to the pump end of the inlet pipe (6), then attach the pipe to the oil pump.
(6) Set the screen cover (1) over the outer end of the oil inlet pipe (6) and secure it to the pipe and brackets (3) with bolts (4).
Tighten the bracket bolts (2) to the bearing caps.
(7) Place the screen (40) in the cover (1) and lock it in place with retainer (39).
(8) Recheck all bolts for tightness to assure there will be no leaks in the oil pump and pipe mounting connections.
(9) Place a new gasket on the oil pan and install the oil pan on the cylinder block. All the oil pan bolts should be started before
any are tightened. Bolts should be tightened snugly but not excessively, starting with the center bolts and working toward each end o the
oil pan. Excessive tightening of the bolts will crush the oil pan gasket unnecessarily.
3-20. Pistons and Connecting Rods
a. Removal.
(1) Drain lubricating and cooling systems (TM 55-1905-217-12, para 3-2).
(2) Remove cylinder head (para 3-13).
(3) Remove oil pump (para 3-19).
(4) Remove the carbon deposits from the upper inner surface of the cylinder liner.
(5) Use a ridge cutter to remove any ridge in the cylinder liner at the top of the piston ring travel.
NOTE
Move the piston to the bottom of its travel and place a cloth over the top of the piston to collect the cuttings. After the ridge has been
removed, turn the crankshaft to bring the piston to the top of its stroke and carefully remove the cloth with the cuttings.
(6) Remove nut (15), bolt (11), and the bearing cap (14, fig. 3-72) and lower bearing shell from the connecting rod. Then,
push the piston and rod assembly out through the top of the cylinder block. The piston cannot be removed from the bottom of the
cylinder block.
Figure 3-72. Piston, connecting rod and cylinder sleeve, removal, disassembly, reassembly, and
installation
3-99
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