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New Timing Gear Tight On Crank?


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#1 dougie1142

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Posted 13 July 2019 - 11:16 AM

Hi all.

This may have been asked before, but I recently purchased a duplex set for my 1330. The gear fitting onto the crank is very tight. I've tried using some grinding paste on the mating surface to smooth it a little bit it's still very tight. Is this common and I need to keep going, or is there something else I should be doing?

Thanks in advance.

#2 imack

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Posted 13 July 2019 - 01:10 PM

My Kent Cams vernier duplex is pretty tight on the crank, not mega tight, just too tight to fit by hand. Needs tapping on and the use of a puller or some careful levering to remove.

#3 Ethel

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Posted 13 July 2019 - 01:18 PM

Try it without the woodruff and have a look at the keyways for burrs or bruising. Also the shoulders of the machined faces might want breaking with a touch of chamfering.



#4 mini13

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Posted 13 July 2019 - 04:25 PM

I found emery works better, as above chamfer the edges with a needle file, also from where you've pasted it you should be able to see any high spots.

#5 Rorf

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Posted 13 July 2019 - 04:44 PM

Use emery tape, the gear must slide on without any force. Same applies to the gear on the cam shaft.



#6 dougie1142

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Posted 13 July 2019 - 06:02 PM

Cheers guys, that's tomorrows task sorted then. I'll give each of the above a go



#7 Moke Spider

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Posted 13 July 2019 - 06:03 PM

As the other guys have suggested in regard to the emery - you don't want to reduce the crank nose size.

 

Many are too tight out of the box, I like to get them a firm fit, that's just too tight to move with the fingers, but only just.






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