[R-390] Info from HSN Issue 37 on repairing a bent PTO shaft

[Les Locklear]

You must be subscribed to the R-390 List. You’ll have to unsubscribe on their website: http://mailman.qth.net/ Go to directory of lists, scroll down to R-390 and follow the instructions. I have no control in this matter.

Les Locklear

From: ecarmichael2001 
Sent: Thursday, July 11, 2013 2:31 PM
To: leslocklear at hotmail.com 
Subject: Re: [R-390] Info from HSN Issue 37 on repairing a bent PTO shaft

Sending me all these emails opt out


>From my Android phone on T-Mobile. The first nationwide 4G network.



-------- Original message --------
From: Les Locklear <leslocklear at hotmail.com> 
Date: 07/11/2013 3:14 PM (GMT-05:00) 
To: ecarmichael2001 <ecarmichael2001 at yahoo.com> 
Subject: Re: [R-390] Info from HSN Issue 37 on repairing a bent PTO shaft 



?

From: ecarmichael2001 
Sent: Thursday, July 11, 2013 2:03 PM
To: leslocklear at hotmail.com 
Subject: RE: [R-390] Info from HSN Issue 37 on repairing a bent PTO shaft

Stop


>From my Android phone on T-Mobile. The first nationwide 4G network.



-------- Original message --------
From: Les Locklear <leslocklear at hotmail.com> 
Date: 07/11/2013 2:39 PM (GMT-05:00) 
To: r-390 at mailman.qth.net 
Subject: [R-390] Info from HSN Issue 37 on repairing a bent PTO shaft 


STRAIGHTENING A BENT R-390A KCS CHANGE SHAFT [Shawn Merrigan] An R-390A purchased
"as is" from Fair Radio had a bent KCS (vfo) change shaft which wobbled visibly when rotated. This
caused binding at the bushing in the gear plate and at the front panel bushing. The result was a hard to turn
KCS change control. I could have simply loosened the front panel bushing lock nut slightly, allowing the
shaft and bushing to float, but I decided to do the right thing and replace the shaft. This is a fairly
straightforward job, but there are a couple of things to watch, and keeping them in mind will help:
1. A taper pin indexes the dial lock hub and gear to the KCS change shaft. This pin has to come out
to remove the shaft. Drive the pin out from the narrow side! This is a small taper pin.
2. A larger taper pin holds the ten-turn stop assembly on the KCS change shaft. This pin must also
be driven out from the narrow side. Look for the smaller of the two holes in the ten-turn stop end
block (looks like a big thick washer) and drive the pin out from that side.
3. When driving out the pins, particularly the larger one, counterbalance  the shaft with a large mass
so you will not bend it. Use WD-40 to loosen the pin and tap gently.
In fact, I wound up straightening out the old shaft using machinist's V -blocks and a brass drift. I then
polished the shaft to remove any burrs and blew out the taper pin holes with WD-40 to prevent binding'
The run out of the straightened shaft was very small and, after re-assembly, there was no binding evident
and the shaft turned smoothly.

Les Locklear
______________________________________________________________
R-390 mailing list
Home: http://mailman.qth.net/mailman/listinfo/r-390
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:R-390 at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html