Guide Bushing 503855201

The rubber guide bushing on my Husqvarna 440 chain saw had torn. Unrelated to this, the small plastic wear protector had done its job by preventing damage to the larger plastic piece to which it was attached. The chain had cut into the protector. The repairs were done with a screwdriver to remove the cover and replace the parts. Just be sure to make sure the chain brake is disengaged before attempting to remove the cover. I neglected to do this and had to pry off the cover. This action may have caused the damage to the guide bushing. It also required disengaging the brake before the cover could be reinstalled. To do this, I had to modify the socket wrench that came with the saw in order to reset the brake. Otherwise, this was a very easy repair.

1)Remove two 1/2" nuts that hold cover on bar on to the engine
2) Remove chain and Bar
3) Clean, check for damage
4) replace cover and use screw driver to tighten cover screws
5) replace bushing on top of cover replace with new screw and tighten securely

1) Remove the chain cover (9/16 socket/wrench)
2) Remove the 2 screws holding the bushing in place (phillips screwdriver)
3) Replace the bushing (pull old one off and push new one on)
4) Reassemble.

Easy peasy. Remove the chain cover. Remove 3 phillips screws. Replace bushing. Clean parts. Replace 3 phillips screws. Put cover back on.

Remove side cover
Remove old bushing
Install new one
Replace air filter
Replace side cover