Author Topic: Cam Bush Oiling - Govener end  (Read 2946 times)

matt

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Cam Bush Oiling - Govener end
« on: October 10, 2008, 12:16:30 AM »
Hi,

What direction should the oil groove be placed when installing a new cam bush in the govener end?

My original bush had oil groove at the bottom, but that doesen't make sense to me. I would have put the groove at the top to allow oil to splash in there and then let gravity and the spinning motion take over to spread the oil around in there.

Am I missing something? 

I am rebuilding my engine (Listeroid) and thought I would ask the original lister experts about this issue.

Thanks,
Matt

SHIPCHIEF

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Re: Cam Bush Oiling - Govener end
« Reply #1 on: October 10, 2008, 04:37:13 AM »
I'm with you. Oil in at the top. The load is on the bottom, the cams push the tappets up. So the bushing needs to be plain and smooth on the bottom to support the load.
If you have a twin, MAKE SURE you get oil into the injector pump support casting on the side opposite from the governor end. This area is lubbed by throw off from the cam bushing. That is not enough to lube the injector pump cam and roller tappet. Several posters have reported worn out fuel injector tappets / cams in this area.
I ran an oil line to this area from the oil pump: I tapped a small oil line off the top of the oil pump, and also drilled a hole in the injector pump support casting, aimed to the cam / tappet. I tapped this 1/8" pipe. I modified the 1/8" pipe end of the hose fitting by soldering in a short piece of steel brake line. When I threaded this fitting into the support casting, I bent the stub of steel  brake line to aim the oil to the contact point of the fuel pump cam and tappet. I put a Frantz toilet paper filter in the oil line for good measure.
Scott E
Ashwamegh 25/2 & ST12
Lister SR2 10Kw 'Long Edurance' genset on a 10 gallon sump/skid,
Onan 6.5NH in an old Jeager Compressor trailer and a few CCK's