How to repair the axial clearance of the crankshaft

The axial clearance of the crankshaft is also known as the end clearance of the crankshaft. During the operation of the engine, too small a gap can cause the parts to expand due to heat and become stuck; Excessive clearance will cause axial movement of the crankshaft, accelerate cylinder wear, and affect the valve timing and normal operation of the clutch. Therefore, during engine maintenance, the size of this gap should be checked and adjusted until it is appropriate.

1) Inspection method:

When prying the crankshaft back and forth in the axial direction, use a dial indicator contact to press against the crankshaft or flywheel end face to measure the axial movement of the crankshaft;

B The crankshaft can be pried to the bottom along the shaft end, and then measured directly between the thrust surfaces using a feeler gauge.

2) Adjustment method: For models that use flanged main bearings, crankshaft thrust bearings, to limit axial movement, there is a wear-resistant alloy on the thrust edge of the bearing that can be scraped. For models that use thrust pads or thrust plates to limit axial clearance, the thickness of the thrust pads or thrust plates can be changed. For the model of inorganic thermal insulation mortar mixer (main bearing and thrust bearing are integrated in the body), it can be solved by adjusting the thickness of the main bearing cap end face gasket.