Oil Coming throuh Generator

Decent amount of oil leaking through generator , needing help with problem solving.

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jon1
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Oil Coming throuh Generator

#1

Post by jon1 » Thu Aug 08, 2019 1:40 pm

Hi, I recently finished my first basket case build on a 63 FLH that had been dissembled since 1974. I have around 300 miles on it now. It has just started leaking oil through the base of the generator. ( a decent amount of oil) . This generator does not have a oil slinger. I am putting a new armature seal on generator today. My question is Why? Can it be too much oil pressure causing this? Should I add a oil slinger? Would over filling oil horse shoe tank cause this? I'm I looking in the wrong area for root cause? Thanks for any suggestions for this novice builder.



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Re: Oil Coming throuh Generator

#2

Post by George Greer » Thu Aug 08, 2019 1:48 pm

Jon,

Welcome on board, I would go to the intro page and introduce yourself. Might get more answers that way.

Don't know if this will help, but on my 58FL project, I took the generator gasket where the slots are, and rotated the gasket to where I could punch a hole to mate up with the generator not a slot that won't seal around the entire generator..

That is what I am doing, and I don't even know if it makes any sense to do it.......but I did..time will tell if it works out OK, once I am finished my long worked on project.

George

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Re: Oil Coming throuh Generator

#3

Post by RUBONE » Thu Aug 08, 2019 1:54 pm

Hi Jon1, and welcome to the Forum. Please go to the new member area and do an introduction so the members have an idea who you are.

As for the leak, is the factory crankcase breather open to the atmosphere? And no filters or other nonsense on the breather? If the cases are being pressurized one of the easiest routes out for the pressure is through the generator, and it carries oil with it.

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Re: Oil Coming throuh Generator

#4

Post by jon1 » Thu Aug 08, 2019 4:34 pm

No breather or filter on the crank case vent.

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Re: Oil Coming throuh Generator

#5

Post by RooDog » Thu Aug 08, 2019 4:46 pm

Belt or chain primary?

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Re: Oil Coming throuh Generator

#6

Post by RUBONE » Thu Aug 08, 2019 5:34 pm

jon1 wrote:
Thu Aug 08, 2019 4:34 pm
No breather or filter on the crank case vent.
So does that mean it is open or not? Does it still exit into the primary case?

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Re: Oil Coming throuh Generator

#7

Post by Larry » Thu Aug 08, 2019 9:11 pm

See what happens when the seal is replaced. I like using the slinger.

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Re: Oil Coming throuh Generator

#8

Post by jon1 » Thu Aug 08, 2019 10:57 pm

Have not quite figured the site out yet as to responding, but It is a chain drive, The vent is open and drips oil onto the primary chain. No slinger on my generator.

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Re: Oil Coming throuh Generator

#9

Post by RUBONE » Fri Aug 09, 2019 12:23 am

With a good seal and a sealed bearing on the generator the slinger is redundant. I use a sealed on side bearing (open facing the engine side for vapor to oil) and a modern seal without issues. The early (pre '45) seals were merely a felt washer.

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Re: Oil Coming throuh Generator

#10

Post by RooDog » Fri Aug 09, 2019 12:35 am

Upon returning home from of my earliest test ride on my recently resurrected 1950 Panhead I found that my -65B genny had unscrewed itself and ,literally, was hanging on by a thread. My fix was to make a new gasket from some gasket stock material, about twice the thickness of the normal replacement paper gasket, with the mount holes punched like George Greer described, glued to the genny end plate. I also replaced the OEM 5/16 FL cap screws with those speced for a Sportster as they are about 1/4" longer for better purchase. -65A uses the same attachment. Since your breather pipe is intact an functioning, a good solid attachment/mounting of your genny may be all you need to fix this issue....
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