Crank shaft / con rod / slide bars

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Crank shaft / con rod / slide bars Empty Crank shaft / con rod / slide bars

Post  Gomer on Sat 03 Aug 2019, 9:09 am

Morning all,

Not sure if this loaded the first time so apologies if it appears twice.

Three questions:
1) How much end float should the crankshaft have? I have the got crankshaft to turn but the end float seems excessive to me at 0.5mm
2) The con rod strap bolts are almost impossible to fit as if the strap is not long enough. Big ends fit nicely in the strap etc so no interference. Now i have the bolts test fitted the wedge drops right down to the bolt as if the big end is completely worn out? I can weld the wedge up a bit and machine back but is this normal?
3)are the slides designed to be slightly bowed? I can get a 0.75 mm feeler gauge between a straight edge at the centre point along its length?

Many thanks for your advice in advance,

Neville

Gomer

Number of posts : 16
Location : Worcestershire
Registration date : 2018-01-11

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Post  Mark the spark on Sat 03 Aug 2019, 9:31 am

I got my end float down to about 20/25 thou
There is something wrong with your wedges so I would contact STW and slide bars should be straight

Mark the spark

Number of posts : 314
Location : Edinburgh
Registration date : 2015-04-26

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Post  Gomer on Sat 03 Aug 2019, 10:29 am

Thanks Mark

Gomer

Number of posts : 16
Location : Worcestershire
Registration date : 2018-01-11

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Post  Capricorn1 on Wed 14 Aug 2019, 9:41 am

I had a similar issue with the cotter being fully up before tightening up - the problem was the big end shell, it had been machined incorrectly.

Capricorn1

Number of posts : 88
Location : West Yorkshire.
Registration date : 2013-07-22

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Crank shaft / con rod / slide bars Empty Con rods

Post  Gomer on Wed 14 Aug 2019, 9:48 am

Thanks Capricorn. I'll take it up with STW again.

Gomer

Number of posts : 16
Location : Worcestershire
Registration date : 2018-01-11

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