[AT] Allis C Oil Pump....

[william.neff.powell at comcast.net]

Carl,

Actually, there are no gears on the C oil pump.... It is a vain pump that spins directly off of the camshaft. I can't remember if it has two vains/brushes that push out or one... 

Since the vain(s) are constantly pushed out via a spring they should always be tight... 

I think you are right, it probably has worn a gap between the plate and the spinning portion of the pump...

Just wondering if anyone else has solved an oil pump problem on a C.....?

Regards,

Will Powell
 -------------- Original message ----------------------
From: "carl gogol" <cgogol at twcny.rr.com>
> Is it possible the clearance between the gears and the housing have worn and 
> are too wide on your oil pump?  Seems like the spec on the D-14 is about 
> 0.005" -- it is relatively easy to lap the housing to bring the clearance 
> back to the spec,  In my case the cover was grooved by the gears and I just 
> lapped the cover to take the grooves mostly out.  Anybody with a repair 
> manual on the C should be able to find that spec for you.  Or perhaps the 
> pump is different than the D series - but AC was really good about reusing 
> solid designs.
> In my case, I still needed a new spring and ball for the relief to restore 
> full pressure.
> Carl Gogol
> Manlius, NY
> AC One Seventy diesel
> (2) AC D-14, AC 914H
> Simplicity 3112 & 7116
> Kubota F-2400, B-7300
> ----- 
> 
> 
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