[R-390] RF subchassis separation

[rbethman]

Mark,

I've looked at the post you showed in the pic.

Since it was highly likely a press fit, it can be "staked" to fix it 
back in place.

It won't be a simple task.  I'd seek out someone with machinist skills.  
That would be someone that can help with this.

Application of something very like the metal bonding tube that for the 
life of me that I can't remember right now.

The combination of "staking" and that compound should make it tight once 
more.

By golly!  I think it is JB Weld.  It finally popped into the old noggin 
as I began to sign the end!

Regards,
Bob - N0DGN



On 3/3/2014 8:35 PM, Mark Richards wrote:
> Now finally doing a rebuild of my R-390A.  Gear train has been 
> disassembled, cleaned, and now in the re-assembly process I hit a 
> snag:  there's a post which hosts the Differential Gear Assembly, and 
> it is very loose.  It cannot be screwed down tightly.  I suspect that 
> this post is press-fit into the gear backing plate. As the post is 
> loose, I think this is accounting for the fact that the Differential 
> Gears are not aligning properly with adjacent gears, nor with the 
> front gear cover.  There is considerable mechanical friction when the 
> front plate is attached.
>
> So, my questions:
>
> 1. Can the RF Subchassis be separated from the gear assembly plate and...
> 2. Can the Differential Gear Assembly post be repaired?
>
> A photo of the offending post:
>
>     http://kumichan.net/private/03-03-2014 20-28-04.png
>
>
> I have another complete gear/RF Subchassis that is of dubious 
> electrical condition, but is mechanically sound.  If I can separate 
> gears from chassis, then maybe an option is to swap out the RF 
> Subchassis with the good gear set?
>
>
> /K1MGY