Farymann Diesel 15W Series, Repair Manual, Page: 53 / 80

REASSEMBLY PROCEDURES
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When a new decompression device is installed
the correct function must be checked. To do so
install the decompression device with the 0,4
mm thick gasket. Continue with steps 14, 15 and
16. Turn the flywheel approx. 1/8 revolution be-
fore TDC and measure with a depth gauge the
distance between bracket of the rocker arm
shaft and spring collar of the intake valve. Next
activate the decompresion device and measure
the distance again. There must be a difference
between the two measurements of about 0,7 –
0,9 mm. If it is less than 0,7 mm you’ve to disas-
semble the deco device and replace the 0,4 mm
gasket with two 0,3 mm gaskets ( all included in
the joint set ). Carry out the two measurements
again.
If the tolerance is more than 1,0 mm replace the
0,4 mm gasket with a 0,3 mm gasket. Carry out
the two measurements.
14. Push rods and protection tube
Slide the protection tube down onto the decom-
pression device. Assemble the retaining spring
exactly as shown.
Don’t tighten the nut yet.
Insert the push rods through the protection tube
into top of the decompression device. Both push
rods are alike. Intake push rod has to be placed
into tapped top hole closest to cylinder.
15. Rocker arms
Place piston to TDC position. Line up rocker
arms and push rods.
Oil rocker arm bolt before installing it into the
support.
Attention
To prevent damage of push rods while torquing
the cylinder head nuts, ensure sufficient clear-
ance between setting screws and push rods.
Tighten cylinder head nuts in 3 steps to speci-
fied torque.