Actually I think I just need to get to the gearbox disassembly to the point of Steps/Pictures 12-16 in Chapter 10 in the manual. Once I get the gear off the MHZ shaft I am good.
From: [email protected] <[email protected]> on behalf of rochep--- via R-390 <[email protected]> Date: Tuesday, June 16, 2026 at 11:40 AM To: Jacques Fortin <[email protected]>; 'Jordan Arndt' <[email protected]>; [email protected] <[email protected]> Subject: Re: [R-390] Removing Megacycle Change shaft I agree, taking out the gearbox is what I am looking at. Got alot more to learn before getting at this, I assume the entire RF deck and gearbox comes out together. Lots of YouTube videos to follow. Thank you all! Paul From: Jacques Fortin <[email protected]> Date: Tuesday, June 16, 2026 at 11:21 AM To: 'Jordan Arndt' <[email protected]>; 'PAUL ROCHE' <[email protected]>; [email protected] <[email protected]> Subject: RE: [R-390] Removing Megacycle Change shaft Hi Jordan, Not sure about this clamp ID, but it must have a 13/32" hole to fit the gear part that it have to hold to the shaft. See attached picture. The ultimate problem that Paul is facing will be to remove the broken clamp there without damaging anything else around. Using a two-part clamp is a good idea, medium hard to machine, but there can be other hidden mechanical damages in his set. We never know what happened to these radios before. To maintain (or restore) those requires both electrical and mechanical skills. IMHO, Paul should attempt a gearbox disassembly, cleaning and reassembly (Y2K-R3a manual Chapter 10). At least, he will be able to catch any other marginal mechanical flaw within during the process. This is one of the worst case I seen so far: a clamp broken at the worst possible place, but.. any other broken clamp within the gearbox will require disassembly, anyways. There is other "stupid" damages I was able to see in my "spare" EAC RF deck yesterday night: some of the clamp screws heads are "eaten" internally, most probably because someone tried to use Allen bits instead of Bristol ones on those. That one will be due for a complete overhaul, I believe: it is completely gummed up, also. PAUL: just a comment... The answers you provided came to me OK directly to my email address, but the same text did not "passed" thru the forum: the postings came to me "empty". I cannot tell why, but have a check... 73, Jacques, VE2JFE in Montreal ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
