Brush gobbler

[thomas_sorrentino]

Ryan,
I am going thru the exact same thing right now(yanmar/kohler). What I
discovered is that the rear commutator slip ring has a grove worn
into it, but only about a third of the way around. Causing the ring
to be more egg shaped. Which I think is whats causing that brush to
wear out so rapidily. I have no idea what has caused this irregular
wear pattern. I bought new slip rings and rear bearing, but don't
have enough guts to attempt the R+R yet! If anybody has been thru
this I also would appreciate any tips and advice.

Tom Sorrentino
1987 PT38
Bedford Hills, NY


--- In WanderlodgeForum@yahoogroups.com, "Ryan Wright"
wrote:
>
> What would cause my generator (12.5kw Yanmar powered Kohler) to eat
> through brushes at a rapid rate?
>
> Some time after buying my coach last year, the generator quit
working.
> I found the rear brush to be worn all the way down and the wire
popped
> off. The front brush looked OK, but I replaced them both anyway, as
> well as the little holder for them just for kicks. Fast forward to
> this weekend: With only ~30 hours of operation on the new brushes,
the
> generator stopped and I found the rear brush worn down with it's
wire
> popped off again. Front brush still looks new. Thankfully, I still
had
> the good front brush from before, so I installed it in place of the
> worn rear brush. This was Saturday morning.
>
> Roughly 5 additional hours of runtime later, the generator stopped
> again. That was this morning and I haven't climbed under there yet
but
> I suspect I'll find that rear brush worn back down.
>
> What's the deal here?
>
> -Ryan
> '86 PT-40 8V92
>