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1934 Cruiser automatic lubrication

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1934 Cruiser automatic lubrication

Post  Graham M on Thu Jun 08, 2017 8:31 am

Hi all,
Starting to try to work out the ins and outs of my bike and are wanting to know how to test if this system is working and I am aware that it needs to be sealed with a cap for it to work, mine has a huge cork in the filling tube.
Does anyone know what thread the cap is and where to get one, also what grade of oil is used by this system?
Thanks
Graham
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Re: 1934 Cruiser automatic lubrication

Post  MoscowFlyer on Thu Jun 08, 2017 11:33 am

Hi, I found this pic which maybe useful in finding a replacement cap, the tread is usually BSP, I'm sure if I'm wrong someone will put us right. In my old books the lubrication is SAE 30. Mike

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Re: 1934 Cruiser automatic lubrication

Post  Graham M on Fri Jun 09, 2017 6:57 am

Thanks for your help Mike, will look at it next week as the old wiring needs attention before trying to start it.
Can I use a normal 2 stroke mix if it doesn't work?
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Re: 1934 Cruiser automatic lubrication

Post  Sorcererflyer on Fri Jun 09, 2017 6:48 pm

I don't think that pre-mix lubrication will work well on this engine, as the main crankshaft bearing are merely brass bushes, and the premix lube will not penetrate between the bush and shaft.

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Re: 1934 Cruiser automatic lubrication

Post  Graham M on Sat Jun 10, 2017 3:48 am

Thanks for your reply as I would have wrecked the engine.
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Cruiser lube

Post  keith.hodgenia on Sat Jun 10, 2017 3:16 pm

Straight 30 is what was used originally. The oil forms the seal in the plain bronze bearings so 2 stroke oil probably a bit thin to seal properly. Keith.

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Re: 1934 Cruiser automatic lubrication

Post  Graham M on Sun Jun 11, 2017 8:30 am

Thanks Keith, will have to work out if the system is working.
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Cruiser lube

Post  keith.hodgenia on Sun Jun 11, 2017 9:35 am

You will only know if it's working once the engine is running. As you have said all the joints and the cap need to be air tight. I run this system on a 1E engined model 14 with mk11 oil regulator l imagine yours will use the same oil system. There is a very small hole under the sight glass of the regulator if it gets blocked the oil tank will syphon into the engine after you park up, guess how I know. Once set up it is an excellent system.

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Re: 1934 Cruiser automatic lubrication

Post  Graham M on Tue Jun 13, 2017 6:42 am

Could anyone let me know how to check if the pump is working and which pipe is oil into the motor and which one is the return to the tank.
Thanks
Graham
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Cruiser lube

Post  keith.hodgenia on Wed Jun 14, 2017 12:01 pm

Hi Graham, there is no oil pump. By a series of galleries and drillings crankcase pressure is used to pressurise the oil tank, the regulator then meters the amount of oil that is delivered to the engine. I am not familiar with your engine so can't comment on which pipe goes where. There are diagrams that explain it better, try to find one to get a better idea of how it works.

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Re: 1934 Cruiser automatic lubrication

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