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bench test Allis B Oil Pump

N

NWagschal

New User
Does any one know how to test or check a oil pump off of the tractor i am concerned because on my current one the pump loses its prime when it is turned off , when i pump oil into the top of it , id drains out through the holes in the shaft is that normal ? i bought one on ebay and it seems like it is acting the same , if isnt going through the check valve , but it seeeps though the area betrween the shaft and the boddy and out the 2 holes on the top of the pump???
 
Aboout the only bench test that will work on a vane pump like that is to make sure if the clearance under the cover and make the ball is seating in the neck. To loose prime it has to get air to let the oil run back down. Much like holding liquid in a drinking straw with your finger over the end. when you lift your finger the liquid runs out. The oil can loose its prime from a bably scored cover, mixing up the gaskets and putting the thick one under the cover rather than the thin one, the ball or seat can be pitted, as well as the pipe in the pan not being tight or cracked which would allow air to get in to the system.
 
Do you know where i can order new gaskets for it over the internet ?

I kinda hate to spit the tractor again just to try it without knowing for sure if it will work : )

I already droped the pan and the pickup was loose and i tightened it , but it didnt help : (
 
Sandy Lake Imp. would have them. They have a web site. They might have the gaskets here on the web site as well. You might want to drop the pan, remove the pick up along with the pipe and inspect them for cracks or rust holes.

Splitting the tractor does get old real fast.
 
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