The manufacturer of the bearing adapter sleeve talks about the inspection and repair of the bearing seat

Check and correct crankshaft bearing damage during use, mainly including wear, fatigue peeling, and burning. When the engine is serviced, new bearings must be replaced. Before repairing the bearing, it is necessary to check whether the bearing seat hole meets the requirements, and the roundness and cylindricity errors of the bearing hole are not greater than 0.015mm. The inspection and correction methods are as follows: wipe off the bearing seat, install the bearing cover, tighten the bolts or nuts according to the specified torque, and use the oil cylinder gauge to check whether the hole roundness and cylindricity exceed the specified value. When the roundness and cylindricity exceed the specified value, weld or pad both ends of the bearing cover for adjustment. Do not file the bearing cover.

The method for bearing wear is to clean the journal and bearing oil, cut the plastic wire gap gauge into a length equal to the width of the bearing, and then place it on the crank pin so that it is parallel to the shaft centerline. Carefully install the bearing cover, tighten the nut to the specified torque, and carefully remove the bearing cover. Carefully remove the bearing cover with a plastic wire partition, and seal it with a plastic wire partition. If the limit value is exceeded, replace the bearing with a new one.

Currently, the commonly used bearing alloys for gasoline engine crankshaft bearings include babbitt alloy and high tin aluminum alloy, with an alloy layer thickness of 0.30 to 0.35mm. In addition to the standard dimensions, there is also a repair dimension corresponding to the crankshaft journal, which can be selected for repair based on the crankshaft journal.

Methods for Solving the Fault of Heavy Bearing Block

1. Carry out planned and planned maintenance on the machine, so as to maintain the machine in good working condition;

2. If oil leakage occurs at the end face, the bearing pads should be repaired to ensure that all components meet the specified requirements, and if necessary, the pads should be reground. During assembly, the correct clearance value should also be ensured, and the viscosity of the selected lubricating oil should also be appropriate;

3. Overhaul components and parts related to bearings and shafts to maintain good static and dynamic balance;

4. If the bearing has pitting corrosion, peeling cracks, etc., it should be repaired and replaced in a timely manner, and the lubricating oil should be kept clean at all times, and replaced regularly;

5. Another situation is that the bearing starts slowly, and the solution is to appropriately increase the bearing clearance if the clearance is small; Also, if the tile surface is not clean, it should be cleaned in time to make the tile surface clean.