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 (11) Fill the fresh water cooling system, after
reconnecting fuel and raw water lines to the engine.
(12) Install starter and generator (para 5-2).
(13) Reconnect the power generator to engine
5-5. Cylinder Liner
a. General. The replaceable type cylinder liner is
accurately machined and heat treated to provide a long
wearing, scuff resistant surface. A flange at the top fits into a
counterbore in the cylinder block and rests on a replaceable
cast iron insert which permits accurate alignment of the liner.
Compression is sealed with an individual laminated
compression gasket for each cylinder. The liner is cooled by
the waterjacket in block, and by the scavenging air furnished
by the blower, through air inlets in liner.
NOTE
If necessary, the air inlet ports may be
cleaned without removing the liner.
b. Cleaning the Installed Liner.
(1) Remove the cylinder head (para 5-3).
(2) Remove the air box handhole covers.
(3) Install a cylinder liner hold down clamp (fig.
Figure 5-20. Compressing the piston rings.
NOTE
Compressors are not always wide enough
to compress six rings of this size at once.
If this is true here, compress the bottom
pair first, until they have entered the liner,
then move compressor to the top four.
(3) Wipe clean, then lubricate journal. Position
the upper bearing half (5, fig. 5-16) (the one with a short
groove at each parting line) in the connecting rod, and
position the rod and bearing half on the journal.
(4) Note match marks on bearing caps. Install
lower bearing half in bearing cap with tang of bearing half in
groove of cap. Position the cap and bearing, then install bolts
(7) through rod and cap. Torque bolts to 50 ft. lbs. and
install new cotterpins.
(5) Install remaining pistons in a similar manner.
(6) Install lubricating oil pump and screen (para 5-
Figure 5-21. Cylinder liner hold down clamp.
(7) Position a new oil pan gasket on pan, position
pan under block, and secure with lockwashers and capscrews.
(4) Turn engine over until the piston of the liner
(8) Tighten hoist, remove blocks from under
whose ports are to be cleaned, is at the bottom of its stroke.
engine, then slide engine to engine mount while guiding it onto
(5) Position a cloth on top of piston, to catch
pilot pin in generator housing and in position to receive the
carbon removed from liner ridges and ports. Clean all ridges
mounting bolts. Lower engine when in place.
and ports with a suitable tool or a hardwood stick, from the
(9) Replace the cylinder head (para 5-3) and all
inside of each liner.
accessories removed (para 5-2) in reverse order of their
removal.
(10) Fill crankcase with engine oil (LO 55-1925-
204-12-5).
5-24
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