Front cuff
1. Remove the crankshaft pulley/vibration damper and hub as described in paragraph 5.
2. Measure and record the insertion depth of the cuff.
3. Hook and pull the cuff out of the body. You can drill a small hole in the cuff, and screwing a self-tapping screw into it, use the pliers to pull out the cuff.
4. Check the bushing at the end of the crankshaft. If wear or scoring is found, it must be replaced. If the bushing is tight, carefully remove it with a lever.
5. Clean the oil seal housing and crankshaft bushing.
6. Dip a new seal in clean engine oil and press it with a pipe or wrench head into the body (open end first) to the marked depth. A piece of thin polyethylene or tape around the sleeve will help protect the cuff from damage during installation.
7. Where used, remove the plastic or adhesive tape from the sleeve.
8. Install the crankshaft pulley/vibration damper and hub as described in paragraph 5.
Back cuff
9. Remove flywheel/drive faceplate as described in paragraph 14.
10. Follow the steps described in p.p. 2 and 3.
11. Check whether the surface of the crankshaft under the cuff is not damaged. If significant wear is found, the crankshaft should be replaced.
12. Clear the case of a cuff and a surface of a flange of a cranked shaft.
13. Dip a new seal in clean engine oil and press it with a pipe or wrench head into the body (open end first) to the marked depth. A piece of thin plastic or duct tape around the back of the crankshaft flange will help protect the oil seal from damage during installation. Please note that for reliable sealing, the collar must be installed to the crankshaft flange at a right angle.
14. Where used, remove plastic or adhesive tape.
15. Install handwheel/faceplate as described in paragraph 14.