What are the specific operation steps of pins
1. First stop the crank of the pumping unit at 45-60 ° above the right, brake the brake tightly, clamp the polished rod with the polished rod clamp, sit on the packing box and remove the load.
2. Remove the connecting rod and crank pin bearing seat, pull out the cotter pin, remove the crown nut, remove the crank pin from the crank hole, clean the crank hole and apply grease.
3. Remove the brake washer and round nut of the bearing cover, smash out the old crank pin, install a new crank pin, tighten the nut, brake washer and bearing cover, and inject butter.
4. Install the new bushing into the crank stroke hole, and then install the new pin. After installing the key, place the compression washer and install the crown nut.
5. Connect the connecting rod and tighten the crown nut. The compression washer shall maintain a gap of 4-10mm with the end face of the crank hole, and install the cotter pin.
6. Loosen the brake, disc the pumping unit, let the donkey head hang the load, and remove the polished rod clamp on the packing box.
7. Open the pump and check the installation quality.
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