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Discussion Forum

'39 AC Model B Oil Pump

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04-29-2002 19:51:50

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I just recently purchased a '39 AC Model "B". I starting to restore it. When I started it up it was not pumping oil. I started looking for the oil pump to replace it but I can't find it!!! The oil filter is a mason jar but the oil pump is no where to be found.

Can anyone please offer some help as to where it could possibly be hiding??

Appreciate any help here!


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04-30-2002 19:13:49

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 Re: '39 AC Model B Oil Pump in reply to Jim/Pittsburgh, 04-29-2002 19:51:50  
your oil pump probly just needs primed. to do this you take off your oil filter and then pour oil down into where the filter screws onto untill it will take no more oil. sometimes you will have to leave it sit and let the oil get down into the pump not just above it. i've had to put almost a quart of oil in one of these before it would work again. just my .02

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04-30-2002 17:47:10

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 Re: '39 AC Model B Oil Pump in reply to Jim/Pittsburgh, 04-29-2002 19:51:50  
Jim, where ya at in the Burgh?
I'm up here north in the Cranberry area

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05-01-2002 19:00:21

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 Re: Re: '39 AC Model B Oil Pump in reply to brian, 04-30-2002 17:47:10  
Brian, I live south of Pittsburgh in Jefferson Boro. I was just up your way today checking out a junkyard looking for parts. Didn't have anything I could use.

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04-30-2002 10:47:44

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 Re: '39 AC Model B Oil Pump in reply to Jim/Pittsburgh, 04-29-2002 19:51:50  
Jim, Oil pump is on back of engine. It's below the tube on the right side at the back, below the mason jar. Take the mason jar off and see if there is a tube in the middle. That tube can get pushed to far down and cause the pressure to be bad by blocking the flow.You do need a tube for it to work right. Prime with oil-squirt can as others have described. Make sure pressure guage is good before spliting tractor. Filter is a C-159 at Carquest. Also might take the oil line loose that goes to head and see if oil is flowing.15-18 lbs. is good. Have one that starts out around 18 lbs. but when temperature reaches 180 degrees it drops to around 8 lbs.HTH. Dale

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04-29-2002 20:13:06

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 Re: '39 AC Model B Oil Pump in reply to Jim/Pittsburgh, 04-29-2002 19:51:50  
the pump is mounted outside the engine at the rear corner on the right, but inside the torque tube. you have to remove the torque tube (clutch housing) to see it. You can see a 1/4 inch pipe coming out of the top of th housing in this area. this is the "output" and then divides to go to the filter and engine valve train. you migh take the tube off and the tee and pump oil down th settl pipe with an oil gun to "prime it". you will only get about 15 psi, an dthat is on a good day. if it runs and has 10 psi, you are o.k. amke sure there is a small 1/4 inch tube stickung up thru the oil filter. only 15% of the oil goes thru the filter, if the tube is gone you will steel the oil and not read right on the gauge.

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Terry R.

04-29-2002 20:09:00

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 Re: '39 AC Model B Oil Pump in reply to Jim/Pittsburgh, 04-29-2002 19:51:50  
Its on the back of the engine.It is hooked to the cam.You have to split the engine away from the housing to get to it.

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