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850 Oil Line Routing and gearbox installation #773705 05/14/19 5:05 pm
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Robert Dentico Offline OP
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Good day all,
During this refresh of my Buddy's '73 850 Commando I was fairly diligent in recording the assemblies that I was removing except, it seems the oil line routing...! Great.

So I have the oil line routing diagram and parts book that corroborates each other for routing to and from the engine and oil filter to the tank however...

The actual routing TO the oil filter spigots are the question. Does the Return Line from the engine to the filter housing route in between the Rear Engine Cradle and down to that spigot, over or under the Rear Iso...?
I do not seem to have a good detail of that.


Wicked sorry for the dumb questioning. I thought I was being thorough but this came up and I need to get it right. I did find some info in a search that brought up some Access Norton Q and A on the subject but I am still unclear as to the physical routing, not the end hook ups.

Thanks very much for any pointers. Photos attached. The shot from the underside, you can just see the return line on the filter housing that is routed through the middle of the Rear Engine Cradle and runs down in front of the Swingarm Pivot.


Oh, while we are at it... The gearbox will be replaced in a week or so after the rebuild. Can I run these lines and have no future interference for install of the gearbox...? Will the gearbox clear the filter housing and all...?


Best,
Rob


[Linked Image]


[Linked Image]















"They told me I was gonna have to work for a livin' but all I wanna do is Ride" - Jackson Browne

Current:
'75 T-160 Trident, '79 T-140 Bonneville, '13 Electra Glide, a garage full of Guzzis, '88 Honda Hawk GT, '84 RZ350 KR, 1991 BMW R 100 RT, 1969 Dalesman Trials etc and a '73 MGB for good measure... smile
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Re: 850 Oil Line Routing and gearbox installation [Re: Robert Dentico] #773712 05/14/19 6:10 pm
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L.A.B. Online Content
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Originally Posted by Robert Dentico
The actual routing TO the oil filter spigots are the question. Does the Return Line from the engine to the filter housing route in between the Rear Engine Cradle and down to that spigot, over or under the Rear Iso...?
I do not seem to have a good detail of that.



Through the space between the cradle and gearbox casing.
[Linked Image]


Originally Posted by Robert Dentico
Oh, while we are at it... The gearbox will be replaced in a week or so after the rebuild. Can I run these lines and have no future interference for install of the gearbox...? Will the gearbox clear the filter housing and all...?



I'm not exactly sure but it probably would have been better to fit the gearbox first (and before securing the engine).

Edit: And the (two?) protection sleeves go on the return pipes (to and from the filter) not one on the feed as it is in your photos.
https://andover-norton.co.uk/en/sho...ear-chain-oiler-and-full-flow-oil-filter

http://www.britcycle.com/Products/06/064283.htm

Last edited by L.A.B.; 05/14/19 6:31 pm.
Re: 850 Oil Line Routing and gearbox installation [Re: Robert Dentico] #773725 05/14/19 8:15 pm
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Robert Dentico Offline OP
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Copy all, good to confirm the routing and yes, I will ensure that the protection sleeves are on the correct lines.


I'll have the gearbox back later this week so hopefully be able to fit it with the engine in. I had been under the impression that with the offset cutouts in the cradle that it will fit unobstructed... crossing my fingers.

Thanks LAB






"They told me I was gonna have to work for a livin' but all I wanna do is Ride" - Jackson Browne

Current:
'75 T-160 Trident, '79 T-140 Bonneville, '13 Electra Glide, a garage full of Guzzis, '88 Honda Hawk GT, '84 RZ350 KR, 1991 BMW R 100 RT, 1969 Dalesman Trials etc and a '73 MGB for good measure... smile
Re: 850 Oil Line Routing and gearbox installation [Re: Robert Dentico] #773729 05/14/19 8:30 pm
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L.A.B. Online Content
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Originally Posted by Robert Dentico
I had been under the impression that with the offset cutouts in the cradle that it will fit unobstructed... crossing my fingers.


You may well have to detach the engine from the cradle to do so.

http://www.classicbike.biz/Norton/Repair/70up_Commando/70upCommando.pdf
Section D7

Re: 850 Oil Line Routing and gearbox installation [Re: L.A.B.] #773784 05/15/19 12:41 pm
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Robert Dentico Offline OP
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Originally Posted by L.A.B.
Originally Posted by Robert Dentico
I had been under the impression that with the offset cutouts in the cradle that it will fit unobstructed... crossing my fingers.


You may well have to detach the engine from the cradle to do so.

http://www.classicbike.biz/Norton/Repair/70up_Commando/70upCommando.pdf
Section D7



Yes sir, Ready to do that.

Thanks,
Rob



"They told me I was gonna have to work for a livin' but all I wanna do is Ride" - Jackson Browne

Current:
'75 T-160 Trident, '79 T-140 Bonneville, '13 Electra Glide, a garage full of Guzzis, '88 Honda Hawk GT, '84 RZ350 KR, 1991 BMW R 100 RT, 1969 Dalesman Trials etc and a '73 MGB for good measure... smile
Re: 850 Oil Line Routing and gearbox installation [Re: Robert Dentico] #773792 05/15/19 1:53 pm
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htown Online Content
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All you have to do is remove one of the rear engine mount bolts. Forgot which one at the moment. Then loosen the other one and the front iso bolt. Use a small bottle jack under the engine with a piece of wood on it and raise the rear of the engine slightly. This should produce the needed clearance.


1978 Bonneville T140E
1974 Trident
1970 BSA Thunderbolt
1971 Norton Commando
1972 Norton Commando
1973 Norton Commando
1974 Norton Commando
2018 Kawasaki Z900RS


Everything will be alright in the end. If its not alright, its not the end.
Re: 850 Oil Line Routing and gearbox installation [Re: htown] #773812 05/15/19 4:26 pm
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Originally Posted by htown
All you have to do is remove one of the rear engine mount bolts.


Two, as there are three.

Re: 850 Oil Line Routing and gearbox installation [Re: Robert Dentico] #773828 05/15/19 7:57 pm
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htown Online Content
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Yes the upper two, it's been awhile since I did this. It should be obvious when you look at . You want the engine to hinge up away from the gearbox opening in the cradle.

Last edited by htown; 05/15/19 8:12 pm.

1978 Bonneville T140E
1974 Trident
1970 BSA Thunderbolt
1971 Norton Commando
1972 Norton Commando
1973 Norton Commando
1974 Norton Commando
2018 Kawasaki Z900RS


Everything will be alright in the end. If its not alright, its not the end.

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