That would make it one of the earlier models: 1947 I'd guess
Our 5U 3005 was a '48 model.
Carb kits for the pony can be had from the green dear tractor dealership: It's the same as what was used on the JD 730 Diesel starting engine.
Good luck with the acute attack of yello-ironitis!
Lots of options on pony motors.......
Remove and convert to direct electric start-OM has a page with instructions about how to bore the bell housing for the starter and all the bits necessary for the conversion.
replace with good used-Any D2/D4/D3400/D4400/D311/D315 pony motor block from 1937-1957/58 approximately will interchange. There are differences in the manifolds and top cover etc, but the basic blocks are the same. D6/D4600/D318 6 cylinder diesel ponies are larger/different engine.
Overhaul-oversize pistons are still available from CAT dealer last time I heard, These are 0.060 oversize and can be turned to whatever size less than that you need.
Lots of the ponies have been bored and sleeved back to standard to use standard pistons probably because of the tendency to flood the crankcase with gasoline and dilute the oil if the fuel tap is left on after starting the main engine. When the rod bearings fail, they frequently break out part of the lower cylinder.
Crankshaft bearings can be a problem. I believe several folks have made new from brass or aluminum bearing stock when the necessary undersize was not available. Since the main bearing journals are on the ends of the crankshaft, a couple of folks have installed a sleeve on the worn area and turned back to standard with good results
CAT would likely be a good place to start looking for the parts you may need, but I would not order before checking around, some of their prices are scary. Sometimes they are the only source, but not likely for most of what you may need.
So I was looking at my machine and i read the serial number wrong it is a 5J not a 5U so the serial number is 5J1310 sorry for the mistake everyone.
The pony motor is seized up so i need to dive into that to that and see what the problem is. The main engine runs. we tow started it with a tractor. Here is a couple pics.
5J1310 is a 1939 according to the D2 tractor/owner listing over on ACME in the archived information section.
Do you have manuals? A parts book is really nice to have just to have a picture of what is there. You need one that covers the serial number range including your tractor. I expect it would be 5J1-5J3500 because the one I have is 5J3501-10561. The parts book covers the whole tractor and engine(s) as well as any CAT attachments that were available at the time (lighting systems, electric start, bumpers, PTO units etc). Blades and hydraulic units produced by CAT have their own books. Yours is too old to have had a CAT dozer from the factory. I wonder if it isn't a Bucyrus Erie. Any tags etc on it?
There are also..
Operator's instructions-adjustments, maintenance, lubrication, basic operating instructions etc.
Serviceman's Reference book for tractor (doesn't include engines other than install and remove them or perhaps change water pump)
Serviceman's Reference book for D3400 engine and starting motor.
Lots of reprints out there, some not so good quality, but still useful. Might find an original on ebay or here or you can get a good quality reprint from CAT's legendary equipment literature site. Not cheap and not original size, but good quality.
http://www.cat.com/cda/layout?m=90800&x=7
5J1310 is a 1939 according to the D2 tractor/owner listing over on ACME in the archived information section.
Do you have manuals? A parts book is really nice to have just to have a picture of what is there. You need one that covers the serial number range including your tractor. I expect it would be 5J1-5J3500 because the one I have is 5J3501-10561. The parts book covers the whole tractor and engine(s) as well as any CAT attachments that were available at the time (lighting systems, electric start, bumpers, PTO units etc). Blades and hydraulic units produced by CAT have their own books. Yours is too old to have had a CAT dozer from the factory. I wonder if it isn't a Bucyrus Erie. Any tags etc on it?
There are also..
Operator's instructions-adjustments, maintenance, lubrication, basic operating instructions etc.
Serviceman's Reference book for tractor (doesn't include engines other than install and remove them or perhaps change water pump)
Serviceman's Reference book for D3400 engine and starting motor.
Lots of reprints out there, some not so good quality, but still useful. Might find an original on ebay or here or you can get a good quality reprint from CAT's legendary equipment literature site. Not cheap and not original size, but good quality.
http://www.cat.com/cda/layout?m=90800&x=7
CCjersey:
Why go to the ACME site when we have a complete listing for every model on the ACMOC chapter 12 site.
http://www.chriscomachinery.com/SerialNumberList.htm
[quote="chriscokid"]CCjersey:
Why go to the ACME site when we have a complete listing for every model on the ACMOC chapter 12 site.
http://www.chriscomachinery.com/SerialNumberList.htm[/quote]
Because the ACME site is more user friendly and it appears you stole a lot of the info off their site.
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