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Two crankcase scews #745690 08/16/18 11:11 am
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Don Leaming Offline OP
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See those two little slot headed scews on either side of the crankcase thru stud located just above the floor jack supporting the engine. What are they there for?
Can they be removed to further drain the sump?
This 65 Interceptor has only one screened sump drain plug not two like the S1A bikes.

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1965 Royal Enfield Interceptor
1969 Triumph Tiger 650
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Re: Two crankcase scews [Re: Don Leaming] #745841 08/17/18 3:47 pm
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Al Eckstadt Online Content
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Hi Don, You probably already know that they seem to be in the parts list as 49 and 50, chaincase level plug and fibre washer. Why chaincase and not crankcase? But it looks like they are designed to empty the crankcase and the oil tank chambers.
Al


Al Eckstadt
Re: Two crankcase scews [Re: Al Eckstadt] #746284 08/21/18 11:19 am
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Don Leaming Offline OP
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I think it is just that the chain part should have been typed as crank! But, .. level plugs? Two of them side by side? That’s what the dip stick is for.
If they are drain plugs, why are two needed? Does the shop book or owners book mention removing these plugs during an oil change?
Gotta love these Enfields!
Cheers
Don


1965 Royal Enfield Interceptor
1969 Triumph Tiger 650
Re: Two crankcase scews [Re: Don Leaming] #746303 08/21/18 3:03 pm
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Al Eckstadt Online Content
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Now I'm really starting to be glad you brought up this topic, Don. I just looked in the '67 manual that JD posted in the Yahoo Interceptor Group files.

"After the first 500 miles, and subsequently, about every 2000 miles, the tank, sump, timing case and felt filter chamber should be drained. Drain the tank and pump by removing the two hexagon headed plugs on the timing side and the two round headed plugs on the drive side of the crankcase and oil tank. See Fig. 2."

This file is Page 4 and 5. The drawing "Figure 2" shows the two round head plugs. The nomenclature in the parts book is totally wrong - not chaincase but crankcase(/oil tank) and not level but drain plugs. The answer to "why two?" is that the oil tank chamber is separate from the crankcase oil chamber.

Thanks for causing me to look into this, Don. My next oil change will include draining these and the timing case.
Is there a shortcut to draining the timing case that doesn't involve removing the entire timing case cover?
Regards
Al

Last edited by Al Eckstadt; 08/21/18 3:15 pm.

Al Eckstadt
Re: Two crankcase scews [Re: Al Eckstadt] #746374 08/22/18 1:01 am
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Don Leaming Offline OP
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Originally Posted by Al Eckstadt
Now I'm really starting to be glad you brought up this topic, Don.
Is there a shortcut to draining the timing case that doesn't involve removing the entire timing case cover?
Regards
Al


I guess you’re supposed to lay the bike on it’s side after removing the crankshaft oil feed plug!
Don


1965 Royal Enfield Interceptor
1969 Triumph Tiger 650

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