Need help with engine serial number

I show a D8800 Industrial engine serial number 4H3001 - up from 1936 to 1939.

so... that means this unit was never in a crawler, but always a stationary power unit?
Do you by chance have a serial breakdown and specs. for that engine?

so... that means this unit was never in a crawler, but always a stationary power unit?
Do you by chance have a serial breakdown and specs. for that engine?

Chriscokid, hi.

Your remark

that's not necessarily so. There’s a power unit that was built (would bet ) on the same day as your engine and it’s mounted in a early D7. I know it’s a 9G series, but the cable unit mounted on the rear has the Sn covered up. I was surprised to find the power unit mounted in the tractor. you will note the SP stamped at the end of the Sn.
Kelly
Sp (special parts ) no doubt something in the transmission or final drive on the cat, and was added later to the tag. My guess is the tractor is after 9G2500. Interesting.

thanks guys,
I appreicate the info, I will try and post some pics of my engine today

In general the biggest challenge to mounting an industrial or gen set engine in a tractor is the oil pan and pump system. Stationary engines normally have a single central oil pan sump and single section oil pump where the tractor uses a three section oil pump to supply lube oil and scavenge the front and rear sumps.
Aside from these and other bolt ons it's still the same basic engine. The governor is also tailored to the application.

So Here are the Pics.
4H3375

I'd say you were just past the RD7 designation with the later style injection pump and "Caterpillar" radiator. The pump change (on tractors) was at 9G2876 which would be in the 9G2505-9G4344 1937 range. I don't have any closer breakdown on the 4H years of production.

Thanks OM,
Your help is much appreicated, can i ask where you found the info on the 4H series motors?