Mark,
The shaft under the moto drivs the keyboard. If it is turning you should be able to transmit.
The grinding you hear may be from the function clutch , behind the ribbons. It has teeth that engage the two halves of the clutch, but some times they don't disengage fully, making a grinding sound. There are two arms on one side of the clutch. One should hit a ball bearing to disengage the clutch..
Try to push on it to fully disengage the clutch
Good luck
Duncan
K2OEQ
Sent from my Kleinschmidt TT-4/TG, the US Army's first portable digital communications device, 1950-1980
-------- Original message --------
Date: 5/30/23 14:50 (GMT-05:00)
Subject: [GreenKeys] TT-76 Help/Howard Weeks
It's been 10 years since I last had a TT-76, it was in a GRC-142 shelter which I sold about 10 years ago. When I secured a TT-76 for it I put out a call for help on here and I believe his name was Howard Weeks responded, I shipped it to him and a short time later I had a 100% working TT-76. I hope I have the name right, it's been a while, I think he was from GA or nearby.
Well here I am again with another GRC-142 and a sick TT-76, the motor turns and I am able to adjust the speed but it sounds like a meat grinder instead of just a motor hum. I lightly touched up the bearings with some Kroil and it did not change. When I type I get no response, I do see what looks like a clutch linkage front right just under and left of the motor closing when I type so it's doing something.
This machine is really out of my area of ability and I am hoping I can find MR. Weeks again or another to get it back up and running again. I have the UGC-74, radio's, modem etc all working again.
73
Mark
K1HF