[AT] 6 to 12 volt starter conversion

[Dennis Johnson]

I have a JD 420 that has a bad spot on the flywheel. I need to get organized enough to split the tractor to get to the flywheel. I could probably rotate the flywheel 1 or 2 bolt holes and be OK. I think that the engine tends to stop on the same rotational angle most times, which causes excessive wear on 1 spot. Any good ideas on supporting each end?? Front is tricycle type. Back support can be either blocks. Maybe I can use 2 hoists on my small gantry crane - need to keep it from tilting. Guess I need to build a small beam with some plates to bolt to side of blocks. Anyone have a better idea or experience in doing this??

Thanks,
Dennis


Sent from my iPad

> On Dec 12, 2016, at 8:44 AM, Ralph Goff <alfg at sasktel.net> wrote:
> 
>> On 12/11/2016 7:19 PM, Dean Vinson wrote:
>> Any experiences converting starters to 12 volt, or not, when converting the
>> rest of the tractor?
> Hi Dean
> I hesitated to even reply since they never seem to make it to the list 
> lately but I guess its typing practice if nothing else.
> I've had the same problem as you with the gear grinding Cockshutt 50 on 
> 12 volts. I don't really think 12 volts is to blame
> as this tractor used to occasionally grind the starter gear when it was 
> still on 6 volts. My 40 has always been 6 volt and
> even it occasionally grinds the starter gear if the engine stops with 
> the ring gear in the bad spot.
> We had the 50's ring gear reversed years ago when the engine was out for 
> repair. Simple job to just heat the ring gear and
> watch it drop off the flywheel. It helped for a few years but its back 
> to grinding bad again . It only takes a couple of turns to
> start on 12 volts but trying to hit a good spot on the ring gear is a 
> real challenge now.
> Other than the engagement I have never had a problem with 12 volts on a 
> 6 volt starter. Two old IH trucks spin the 6 volt
> starters quickly and start way better than they did on 6. No engagement 
> problems at all.
> Hope to see this show up on the list but not holding my breath.
> 
> Ralph in Sask.
> 
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