[R-390] RF subchassis separation

[Norman Ryan]

Here's the link again for those who could not open it:


http://kumichan.net/private/03-03-2014-20-28-04.png

Copy and paste it to your browser if clicking on it does not open it.

Norman




On Monday, March 3, 2014 9:41 PM, rbethman <rbethman at comcast.net> wrote:
 
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
>
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