Farymann Diesel 15W Repair Manual page 49

Note : Picture shows air cooled cylinder head !
REASSEMBLY PROCEDURES
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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 bottom facing up. Install
piston from bottom side of the cylinder. Never
tap on the piston crown.
Attention
Never try to install piston through top of the liner
as liner is slightly tapered. Push in the piston so
far that the piston pin bore is slightly above edge
of cylinder.
Slide the piston and cylinder over the studs.
For 18W / 32W only :
The arrow-sign ( or crankshaft-sign ) stamped
on the piston top must point towards the fly-
wheel.
Align the piston and conecting rod bores. Push
the piston pin in and insert the retaining
ring.Push the cylinder down until it seats firmly
onto the engine crankcase.
11. Cylinder head
Press the valve guides into the cylinder head
using a driver. Special care is necessary to en-
sure that the guide is exactly vertical before
pressing in.
Attention
Before pressing in the exhaust valve guide, as-
semble the two small washers and retainer ring.