Film-Tech Forum ARCHIVE: Dolby Cat 701 Omega Spring Replacement

This is topic Dolby Cat 701 Omega Spring Replacement in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=011087

Posted by Justin Schroepfer (Member # 6004) on 11-12-2011, 08:49 AM:

The bottom omega spring on our Dolby Cat 701 sound head snapped. I have the replacement part, but I don't know how to go about replacing it. I've never taken apart the sound head before and I can't seem to find a guide or manual to help me.

Any tips/advice for me?

Posted by Monte L Fullmer (Member # 2797) on 11-12-2011, 12:15 PM:

1-Remove the guidance roller off the shaft that is partically blocking the pivot shaft of that pad roller where the omega spring is broken. 1/16" allen is to be used to remove the roller

2-You loosen up the lower pad roll allen screw and pull it out were you can get the spring out and to replace.

Re-assemble in reverse.

Good luck-Monte

Posted by Mark Gulbrandsen (Member # 72) on 11-12-2011, 02:21 PM:

Monte left one important thing out... Don't loose the wavy washer at the end of the pad roller arm casting! Put a little grease on it to hold it to the main frame when re-assembling.it in the verticle position... or do it horizontally on a bench without any grease.