16 ENGINE 128
16.4.16 Checking oil pumps for wear
Info
The oil pump wear check shown here is on the suction pump but it applies to all oil pumps.
300106-10
– Use a feeler gauge 1 to measure the play between the external rotor and the
engine case as well as between the external rotor and the internal rotor.
Oil pump
Clearance between external rotor
and engine case
≤ 0.20 mm (≤ 0.0079 in)
Clearance between external rotor
and internal rotor
≤ 0.20 mm (≤ 0.0079 in)
Axial clearance 0.04… 0.08 mm (0.0016…
0.0031 in)
» If the measured value does not meet specifications:
– Change the oil pump and, if necessary, the engine case.
16.4.17 Replacing autodecompressor
300107-10
– Take the lock ring 1 off the autodecompression shaft and dispose of it.
300108-10
– Pull the autodecompression shaft 2 from the camshaft.
300109-10
– Disconnect the autodecompression spring. Loosen the screw 3 and remove it
together with the autodecompression spring and the autodecompression weight 4.
300110-10
– When assembling, first connect the autodecompression spring and then insert the
screw through the autodecompression weight.
The arm of the autodecompression spring 5 is long enough to pass right
through the autodecompression weight.
– Position the autodecompression weight. Mount and tighten screw 3. Reconnect
the autodecompression spring.
Guideline
Screw, autodecompression M6 3… 4 Nm
(2.2…
3 lbf ft)
Loctite
®
243™
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