Checking the engine flywheel

Checking the engine flywheel

• Check that the ring gear teeth are not cracked or show signs of seizure; if they do, change the ring gear as described below:

• working under the press remove the old ring gear;
• accurately clean the contact surfaces of the new ring gear and of the flywheel;
• evenly heat the new ring gear to 120° + 140°C and fit it on the flywheel: leave to cool naturally, do not force cool.

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Checking the oil pump

Check that the clearance between the pump casing and the driven gear is within the specified limit.

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Clearance between pump casing and driven gear
0.170 + 0.275 mm

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Clearance between pump casing rest surface and upper side of gears
0.025 + 0.075 mm

1. Check that the clearance between the lobe of the inner gear and that of the driven gear is within the specified limits.

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Clearance between driven gear and inner gear
0.040 + 0.290 mm

• Using a torque meter, check that the characteristic data of the engine oil pressure limiting valve control spring are within the specified limits.

Spring length
With spring free 54 mm
With static load (14.6 kg) 36 mm
With dynamic load (21 kg) 28 mm