The replaceable type cylinder liner (Fig. 1) is accurately
This motion persists throughout the compression stroke
machined and heat treated to provide a long wearing
scuff-resistant surface. The flange at the top fits into a
counterbore in the cylinder block and rests on a
The wear on a liner and piston is directly related to the
replaceable cast iron insert which permits accurate
amount of abrasive dust and dirt introduced into the
alignment of the cylinder liner.
engine combustion chamber through the air intake. This
dust, combined with lubricating oil on the cylinder wall,
A long-oval port cylinder liner (Fig. 2) is used with
forms a lapping compound and will result in rapid wear.
pistons equipped with three compression rings and a fire
Therefore, to avoid pulling contaminated air into the
ring (top ring groove).
cylinder, the air cleaners must be serviced regularly
according to the surroundings in which the engine is
NOTE: Do not use the short-oval port liners in this
engine. Only long oval port liners can be used.
Remove Cylinder Liner
The liner is cooled by means of a water jacket in the
cylinder block and by the scavenging air introduced into
It is very important that the proper method is followed
the cylinder through the air inlet ports around the liner
when removing a cylinder liner. Do not attempt to push
(Figs. 1 and 2). The air inlet ports are machined at an
the liner out by inserting a bar in the liner ports and
angle to create a uniform swirling motion to the air as it
rotating the crankshaft, otherwise the piston may be
enters the cylinder.
damaged or the upper ring groove may collapse.
Remove a cylinder liner as follows:
1. Remove the piston and connecting rod assembly as
outlined on page 10-2-79.
2. Remove the cylinder liner with tool J 1918-02 as
a. Slip the lower puller clamp up on the puller rod
and off the tapered seat. Cock the clamp so it
will slide down through the liner. The clamp will
drop back on the tapered seat after it clears the
bottom of the liner. Then slide the upper puller
clamp down against the top edge of the liner.
b. With the tool in place, strike the upset head on
the upper end of the puller rod a sharp blow with
the puller weight, thus releasing the liner (Fig.
c. Remove the tool from the liner. Then remove
the liner from the block.
d. Remove the liner insert and shims (if used) from
the counterbore in the block.
e. Tag the liner, insert and shims.
Fig. 1. Typical Cylinder Liner.
If tool J 1918-02 is unavailable, tap the liner out with a
hardwood block and hammer.