How to check and adjust the camshaft axial clearance? Pump camshaft manufacturers for you to introduce it:

Inspection of camshaft axial clearance. After removing the other parts of the valve transmission set, push the dial gauge probe against the camshaft end and push and pull the camshaft back and forth along the arrow direction. The pendulum momentum of the dial gauge pointer is the axial clearance of the camshaft.

If the camshaft axial clearance exceeds the allowable limit, the thickness of the spacer can be reduced or the thrust flange can be replaced.