Release 00 - 11/2018
page 43
15. ENGINE BLOCK - External operations
15.6. Replacing the lower compression ring of the
engine shaft (sump side)
NOTE - Remove the motor from the lawnmo-
wer;
- drainalltheoilfromthesump;
- drain the petrol from the tank and carbu-
rettortray;
- turn the motor 180°.
1 - Take out the spline key (26).
2 - Use a thin screwdriver inserted under the sealing
lip to extract the oil seal ring (27).
3 - Make a paper tube (28) around the shaft to
protect the sealing lip and insert the new ring (29)
so that it enters its housing.
4 - Complete the insertion with the help of a pipe
(30) of a diameter of approximately 30-35 mm.
Tightening torques
2 Spark plug tightening torque 25-32 Nm
6 Valve cover xing screws 8-12 Nm
13 Flywheel xing nut 55-65 Nm
19 Blow-by closure plate screws 5-7 Nm
Technical information
Inlet valve clearance 0,10-0,15 mm
Exhaust valve clearance 0,15-0,20 mm
Special equipment
3 Compression testing tool
26
27
29
28
30
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