The Ford Barn

john charlebois · 01-28-2018, 06:03 PM

I rebuilt our oil pump for '30 engine and tested it today by putting it in a container of oil and hooked my drill up. Just checking, it worked well only when the drill was in REV. Is that correct??

wrndln · 01-28-2018, 07:22 PM

Model A oil pumps are very simple. There isn't much you can do to mess them up. Just remember to make sure the spring is on the bottom. I don't know about REV on a drill. I would think either way the pump would pump oil, however I have never tried to use a drill to test my rebuilt pumps - they just work.
Rusty Nelson

1955cj5 · 01-28-2018, 07:29 PM

The oil pump is driven by the same gear and shaft that drives the distributor cam and rotor.

As viewed from above, when the engine is running the distributor cam and rotor turn counter-clockwise.

So if FWD on your drill is clockwise, REV must be counter-clockwise, the same direction as the pump would be driven by the engine

cpf240 · 01-28-2018, 07:50 PM

Maybe its a pump meant for use in the Southern Hemisphere?

Synchro909 · 01-28-2018, 09:25 PM

Quote:

Originally Posted by cpf240

Maybe its a pump meant for use in the Southern Hemisphere?

No, the pumps here suck oil from the sump via the bearings.

Big hammer · 01-28-2018, 10:14 PM

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Quote:

Originally Posted by john charlebois

I rebuilt our oil pump for '30 engine and tested it today by putting it in a container of oil and hooked my drill up. Just checking, it worked well only when the drill was in REV. Is that correct??

That’s correct! Did you make a big mess turning it with a drill ?

Anteek29 · 01-29-2018, 01:13 AM

I hope you used a variable speed drill and started SLOW?

Purdy Swoft · 01-29-2018, 01:08 PM

Model A oil pumps will even pump thin liquid . I test mine over my parts cleaner tub . There was some really good info on oil pumps in some of the early secrets of speed journals . Most if not all of the rebuild kits include a gasket for the bottom plate of the pump . I don't believe that Ford used this gasket . The lower gasket creates more area inside the pump . More area inside the pump slightly reduces pumping action . I only use the upper screen cover gasket .

George Miller · 01-29-2018, 01:42 PM

Quote:

Originally Posted by Purdy Swoft

Model A oil pumps will even pump thin liquid . I test mine over my parts cleaner tub . There was some really good info on oil pumps in some of the early secrets of speed journals . Most if not all of the rebuild kits include a gasket for the bottom plate of the pump . I don't believe that Ford used this gasket . The lower gasket creates more area inside the pump . More area inside the pump slightly reduces pumping action . I only use the upper screen cover gasket .

Me to

01-28-2018, 06:03 PM	#1
john charlebois Junior Member Join Date: May 2012 Posts: 4	oil pump rebuild I rebuilt our oil pump for '30 engine and tested it today by putting it in a container of oil and hooked my drill up. Just checking, it worked well only when the drill was in REV. Is that correct??

01-28-2018, 07:22 PM	#2
wrndln Senior Member Join Date: May 2010 Location: Lakeville, MN Posts: 5,162	Re: oil pump rebuild Model A oil pumps are very simple. There isn't much you can do to mess them up. Just remember to make sure the spring is on the bottom. I don't know about REV on a drill. I would think either way the pump would pump oil, however I have never tried to use a drill to test my rebuilt pumps - they just work. Rusty Nelson

01-28-2018, 07:29 PM	#3
1955cj5 Senior Member Join Date: Apr 2015 Location: Boise, Idaho Posts: 1,578	Re: oil pump rebuild The oil pump is driven by the same gear and shaft that drives the distributor cam and rotor. As viewed from above, when the engine is running the distributor cam and rotor turn counter-clockwise. So if FWD on your drill is clockwise, REV must be counter-clockwise, the same direction as the pump would be driven by the engine __________________ Early '29 CCPU that had a 4-speed, but not any more.......in the family since '62

01-28-2018, 07:50 PM	#4
cpf240 Senior Member Join Date: Feb 2017 Location: Northern Idaho Posts: 282	Re: oil pump rebuild Maybe its a pump meant for use in the Southern Hemisphere?

01-29-2018, 01:13 AM	#7
Anteek29 Senior Member Join Date: Dec 2014 Location: Santa Maria, CA Posts: 985	Re: oil pump rebuild I hope you used a variable speed drill and started SLOW? __________________ Alan 1929 Special Coupe 1941 Pick-Up 1955 Victoria

01-29-2018, 01:08 PM	#8
Purdy Swoft Senior Member Join Date: May 2010 Location: Alabama Posts: 8,099	Re: oil pump rebuild Model A oil pumps will even pump thin liquid . I test mine over my parts cleaner tub . There was some really good info on oil pumps in some of the early secrets of speed journals . Most if not all of the rebuild kits include a gasket for the bottom plate of the pump . I don't believe that Ford used this gasket . The lower gasket creates more area inside the pump . More area inside the pump slightly reduces pumping action . I only use the upper screen cover gasket .