6-27.4. CYLINDER LINER - MAINTENANCE INSTRUCTIONS.
a. The replaceable type cylinder liner is 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 replaceable cast iron insert
which permits accurate alignment of the cylinder liner. Compression is sealed with an individual laminated compression
gasket for each cylinder.
b. The liner is cooled by a water jacket in the cylinder block and by the scavenging air introduced into the cylinder
through the air inlet ports around the liner. These ports are machined at an angle to create a uniform swirling motion to
the air as it enters the cylinder. This motion persists throughout the compression stroke and facilitates scavenging and
c. The wear on a liner and piston is directly related to the amount of abrasive dust and dirt introduced into the
engine combustion chamber through the air intake. This dust, combined with lubricating oil on the cylinder wall, forms a
lapping compound and will result in rapid wear. To avoid pulling contaminated air into the cylinder, the air silencer must
be serviced regularly.
d. This paragraph also includes installation of the piston and connecting rod assembly into the cylinder liner. Next
these components are installed in the engine.