Farymann Diesel 15D Series, Workshop Manual

Page: 48 / 76

III. ENGINE REPAIR
49
Oil the ring and piston skirts. Check that
piston ring gaps are 120 degrees offset.
Compress rings with ring compressor. Lay
the cylinder down on the bench with the
bottom facing up. Install the piston into the
cylinder from the bottom. Never tap on the
piston crown.
Attention: Never try to install piston
through top of cylinder liner as liner is
slightly tappered. Push in the piston so
far that the piston pin bore is slightly
above edge of cylinder.
(Figure 19)
Slide the piston and cylinder over the studs
with the crescent shaped sparing in the
cylinder fins facing the gear side of the
engine.
For 18B/D engines only:
The arrow stamped on the piston top
must point towards the flywheel.
Align the piston and connecting rod bores.
Push the piston pin in and insert the
retaining ring. Push the cylinder down until it
seats firmly onto the engine block.
(Figure 20)
11. Cylinder head
Press the valve guides into the cylinder
head using driver (for protrusion dimension
see III.2.17/
18). Special care is necessary to ensure
that the guide is exactly vertical before
pressing in.
Attention: Before pressing in exhaust
valve guide, assemble the two small
washers and retainer ring (the exhaust
valve has the larger counterbore when
viewed from top but the smaller valve
diameter when viewed from the bottom.
(Figure 21)