Precision cam splitter bearing repair knowledge

1. Criterion of the size of the cam bearing journal, select the bearing of the same level of patch size.

2. The cam bearing and the bearing hole should have a positive interference.

3, criticized the journal size scraping bearing, the essentials are: the bearing is placed on the corresponding journal, the bearing is removed after several turns of the bearing, the bearing alloy is repaired by the smashing environment, and the bearing is placed on the journal after the scraping After removing the bearing, the snoring environment is repaired again and the shaving is repeated. The thickness of the thick gauge inserted between the bearing and the journal = the common interference between the bearing and the bearing bore + the common clearance between the bearing and the journal, and a slight resistance when the thickness gauge is pulled. In this way, when the cam splitter presses the bearing into the bearing hole, the required common gap can be obtained because the reduction of the inner diameter of the bearing is close to the interference between the bearing and the bearing hole. When scraping, even if the bearing wall thickness is symmetrical, the concentricity of each bearing is covered.

4. Lower the rear end cover of the cylinder block and remove the old bearing. When the new bearing is pressed in, the oil hole should be carefully aligned, and the camshaft bearings of each lane should not be misplaced, so as not to affect the lubrication of the rocker arm mechanism.

5. Insert the cam bearing into the bearing hole and turn it a few times. The environment with proper tightness and snoring area is properly repaired. The main method for checking the common tightness is to apply oil to the bearing. After turning the camshaft a few times, when the splitter uses the finger to move the timing gear, the motor should be rotated without the jamming sign, and the cam bearing can be pulled up and down without significant gap. .
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