113
8
503 84 40-01
502 50 38-01
A
B
C
Check the connecting rod small end.
Check the crankshaft bearing.
Tightness testing
Fit the sealing plates and pressure test
the nipple.
Connect the pressure gauge and check
the leakage.
Check the connecting rod small end.
If there are signs of seizure marks or
discolouring on the bearing race, the
crankshaft should be replaced.
Crankshaft and crankcase
Check the crankshaft bearing. The con-
necting rod should not have any radial
play (upwards and downwards).
It should, however, have axial play in or-
der to ensure adequate lubrication of the
crankshaft bearing.
Tightness testing
Clamp a sealing plate (A) between the
carburettor and inlet pipe and a sealing
plate (B) between the muffler and the
cylinder. Tighten the screws to ensure
tightness.
Fit the pressure test nipple (C)
503 84 40-01 instead of the plug.
Connect pressure gauge 502 50 38-01 to
the nipple and pump up a pressure in the
crankcase of 50 kPa (0.5 kp/cm
2
).
Max. permissible leakage: 20 kPa (0.2
kp/cm
2
) per 30 seconds.
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