The Ford Barn - View Single Post - '34 21 stud

Bruce Lancaster · 07-14-2010, 03:13 PM

The flathead pump system is simple and sturdy, but there are a couple ways it can fail, as distinguished from just slow deterioration in pressure from general wear.
If the drop to nothing turns out to be real, it is possible that accumulated crud from storage came loose...a nice mouse nest or some such...and totally blocked the pickup. Also, a '34 would still have the drive gear on the rear of the cam that turns the pump made with a round hole pressed onto a round shaft. Later ones have D-shaped hole and shaft. The round setup can slip and rapidly wear to free fit on the shaft if something (again, possible crud) gets into pump teeth and adds resistance.

07-14-2010, 03:13 PM	#4
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: '34 21 stud - no oil pressure The flathead pump system is simple and sturdy, but there are a couple ways it can fail, as distinguished from just slow deterioration in pressure from general wear. If the drop to nothing turns out to be real, it is possible that accumulated crud from storage came loose...a nice mouse nest or some such...and totally blocked the pickup. Also, a '34 would still have the drive gear on the rear of the cam that turns the pump made with a round hole pressed onto a round shaft. Later ones have D-shaped hole and shaft. The round setup can slip and rapidly wear to free fit on the shaft if something (again, possible crud) gets into pump teeth and adds resistance.