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Patrick Lockyer.
Grand Master
Username: pat_lockyer

Post Number: 1230
Registered: 9-2004
Posted on Tuesday, 11 April, 2017 - 06:31 pm:   Edit PostDelete PostView Post/Check IP

Is this a one off or has the replacement been numerous.
David why should the spring break on the resting tail as apposed to the coil.
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David Gore
Moderator
Username: david_gore

Post Number: 2514
Registered: 4-2003
Posted on Wednesday, 12 April, 2017 - 07:22 am:   Edit PostDelete PostView Post/Check IP

Patrick,

I suspect the probable cause would be an internal fault in the rod used to make the spring.

The most likely cause would be either internal non-metallic inclusions or surface defects such as laps/seams resulting from the rolling and drawing of the wire rod. In your case, internal non-metallic inclusions triggering a fatigue/brittle fracture would be my prime suspect for the cause of failure.
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Patrick Lockyer.
Grand Master
Username: pat_lockyer

Post Number: 1238
Registered: 9-2004
Posted on Thursday, 13 April, 2017 - 04:56 am:   Edit PostDelete PostView Post/Check IP

Thanks David for the advice, have fitted a s/hand one while the seat was off.
will put it down to a one off event!

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