Hi Neil P,

I would hazard a guess that the pilot motor off a D7E would go close to a fit up to a D8H without too much modification, if any.

Regards, Neil C

Hi Team
I had a pair of ponies from I think 572E (D7E) pipe layers that were updated to Direct Start and there is an early pilot engine that will not fit the later S/No machines due if I recall changes to oil cooler lines or other reasons.
I sold the early one to a person who gave me the incorrect S/No for his machine and he found this issue out as his was the later version pony--he tried fitting the timing gear cover off his old pony to to the one I sold him and he found the pony cylinder blocks were different.
The front timing cover has the boss on it to mount a bracket to the Diesel engine block and this is different by a lot.

I do not have the data now as this was 20 + years ago now--you will need to be wary.
I offer this in good faith and hope others can enlighten us further.
I stand to be corrected as I do not have D7E Parts Books to cross reference this.

This points out the on-going issue of Caterpillar's ongoing improvements that necessetate correct S/No's for supply of correct data.

Regards,
Eddie B.

Borrow a couple of large 12volt batteries, a can of starting fluid and a 24 volt starter with the pinion changed over to the pilot motor type. I think would be the quickest way to fire up and move it. You might mention what the serial number is.
Regards, Wombat

The 17a starting engine is't the same model from 46a ,timing cover ,front and rear wather pipe,exhaust pipe,the front and center support and rear pinion and more