[AT] cub / prime oil pump

[Mark Greer]

On rebuilds I have always packed the oil pump with Lubriplate 105 Motor
assembly lube which dissolves into the engine oil after the engine warms up.
Having the pump full gives it "seals" the gears giving them extra suction to
pull oil into the pickup tube.
Mark

----- Original Message ----- 
From: "H. L. Staples" <hlstaples at mcloudteleco.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Thursday, June 09, 2005 12:45 PM
Subject: Re: [AT] cub / prime oil pump


> Walt  a gear pump will not pump air as well as it will oil because of the
> necessary clearances within the pump and the fact that air is so much
> thinner than is oil.
>
> I have always been told to pack a new pump with light weight gun grease so
> that all the air spaces are filled. If a gear pump were made with zero
> clearance so that there was no air space then the pump would also be
locked
> up.
>
> Vane pumps do a pretty good job of pumping air until the vane ends become
> worn and allow slippage or bypass.
>
>
> H. L. Staples
> McLoud, Oklahoma
> USA