Return to the Garages/Workshops Forum | Post a Follow-Up

Craftsman 139.53629SRT Keeps Running

Posted by najajr (My Page) on
Sat, Feb 9, 08 at 19:29

Hello Craftsmen Door Guy Experts (Pretty soon I will be able to join your ranks I think).

One of you advised me about 2-3 years ago (Doorman06?) when I replaced the drive gear on my Craftsman 1/2 HP Unit. Today I needed to replace the drive gear AND sprocket. (Replacement Part 41C4220A) It seems some type of bearing had worn out, the sprocket had all types of play, and the chain would not stay put. Anyway, after two or three hours spent replacing the drive gear and sprocket, I believe I may have upset something inside the unit and the motor runs continually even after the limit terminals make contact.

What did I do wrong? Better yet, what do I do now?



Follow-Up Postings:

RE: Craftsman 139.53629SRT Keeps Running

Sounds like you may have knocked loose a wire that runs to the limit switch. If you did I would think it would be hanging there.

RE: Craftsman 139.53629SRT Keeps Running

Hi Don,

Thanx for reponse. I disconnected and reconnected all of the terminal wires I could see. Could the circut board have shorted out or something? Sears wants $200.00 (120 + 80) for a new unit plus install. I think it would be $80.00 well spent!!



RE: Craftsman 139.53629SRT Keeps Running

Hi Nick, good chance you already had an inop limit circuit in yuor logic board. I ALWAYS test the limits first b4 putting in a gearkit or sprocket assy. Sorry , Dave.

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Garages/Workshops Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here