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650 Crankcase parting, helpful tool made

650 Crankcase parting, helpful tool made

Postby nortriubuell » Mon Jan 23, 2017 6:51 am

Never needed it before, but sure need it now. I rebuilt this 1969 650 motor about a year ago, and I want to put all the bits in a 1971 650 matching frame and case halves I recently bought. 1971 Triumph factory service manual calls for using "Crankcase parting and sprocket extractor tool, p/n 61-6046" when splitting the cases. Yes, I've removed all the screws and bolts, and yes they've parted easily in the past what with the roller bearing on the drive side. But ... these just won't part, ugh :evil: Don't want to damage the cases by using chisels, screw drivers, or excessive pounding with a mallet. I found that Klempfs list the tool for sale ... but of course it is OUT OF STOCK :(

http://www.klempfsbritishparts.com/TOOL ... -PARTING-0

Triumph made the tool, so I assume they knew it may be needed from time to time.

So ... anyone have a "Crankcase parting and sprocket extractor tool, p/n 61-6046" that I could borrow ????
Last edited by nortriubuell on Mon Jan 23, 2017 6:33 pm, edited 1 time in total.
70 Triumph 650 chopper
73 Norton 750 "bitsa"
74 Norton 850 project
76 Triumph w/69 650 motor
80 Kaw KZ1000
99 Buell Cyclone
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Re: 650 Crankcase parting help needed

Postby nortriubuell » Mon Jan 23, 2017 6:32 pm

Well ... crankcase halves are now SEPERATED :D

1. I took a plate of steel and drilled three holes, using a used stator as a template.
2. Then installed the nut on the crankshaft that holds the rotor on.
3. Next, I mounted the plate on three equal length stator studs.
4. And last, I tightened each of the three nuts on the stator studs, barely a half turn at a time. The plate pushed in on the nut on the crankshaft, firmly ... but gently.

The cases started to split nice and even. When I had a half inch gap all the way around, I pulled them apart :) I had used gray Yamabond to seal the case halves together, and it didn't leak. Must have acted like glue a wee bit I guess. Now that I have a "tool", I feel safe to continue using the Yamabond.

Hope this helps ... someone at least. Cheers, Pat
70 Triumph 650 chopper
73 Norton 750 "bitsa"
74 Norton 850 project
76 Triumph w/69 650 motor
80 Kaw KZ1000
99 Buell Cyclone
Access Norton VIP Paying Member
nortriubuell
VIP MEMBER
Posts: 567
View Photo Album - Images: 6
Joined: Sun Aug 29, 2010 5:34 pm
Location: Yulee, Florida

Re: 650 Crankcase parting, helpful tool made

Postby robs ss » Tue Jan 24, 2017 5:08 am

Thanks Pat - nice shared solution
Cheers
Rob
1962 Norton ES2
1964 Norton 650SS
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