Author Topic: 1949 A7 Engine Dismantle - Cam Pinion Nut  (Read 570 times)

Offline mrduc1198

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1949 A7 Engine Dismantle - Cam Pinion Nut
« on: 12.08. 2012 08:00 »
Tips/Advice anyone?

Dismantling the engine following the Haynes manual.

The engine cases are separated with magneto, inner timing cover, and oil pump removed.

I'm having trouble getting the nut off the cam pinion.  There is no tab washer as specified in the manual.  The cam is free to spin and I can't get sufficient leverage to get the nut undone.

thanks
1949 BSA A7 Rigid, 1990 Yamaha XT600(Ex-Australian Army), 1992 Honda VFR400 track bike, 2009 Ducati 1198s

Online Brian

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Re: 1949 A7 Engine Dismantle - Cam Pinion Nut
« Reply #1 on: 12.08. 2012 08:11 »
A couple of options.

Use a "rattle" (air operated impact gun) gun to undo the nut.

Clamp the end of the cam in a vice with soft jaws.

Once you have removed the nut you must remove the gear. Do not hit the end of the camshaft to try and get the gear off, there is a key in it that will dig into the bush if you try this.

Offline mrduc1198

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Re: 1949 A7 Engine Dismantle - Cam Pinion Nut
« Reply #2 on: 12.08. 2012 08:24 »
Thanks mate!!!!

Nut is off
1949 BSA A7 Rigid, 1990 Yamaha XT600(Ex-Australian Army), 1992 Honda VFR400 track bike, 2009 Ducati 1198s

Offline duTch

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Re: 1949 A7 Engine Dismantle - Cam Pinion Nut
« Reply #3 on: 12.08. 2012 11:11 »
FULLY take note of Brians caution, even when I knew I still had a moment of forgetfullness, and you don't need a keyway in the bushing..!!
 That is to say, Pull the bush OFF the shaft -DON'T drive the shaft through the bush.....

How'm I doing?? sorry to be that way but you did ask?  cheers and good luck, duTch
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia