05-08-2019, 08:40 PM
Greig,
What you say is perfectly valid for taper cotters. Unfortunately, kingpin cotters are not taper cotters. They have a 'half-moon' cut into them which bears up against the circumference of the kingpin, preventing it from turning in the axle purely by friction. in order to remove the cotter, you hvae to take the kingpin out first.
The kingpin cotter only needs a good 'nip' for it to work. If it has come loose, then the nut will be loose too. I check mine during routine maintenance by applying a spanner to them and checking they don't move. if they do, then a nip is all that's required. No real pressure.
What you say is perfectly valid for taper cotters. Unfortunately, kingpin cotters are not taper cotters. They have a 'half-moon' cut into them which bears up against the circumference of the kingpin, preventing it from turning in the axle purely by friction. in order to remove the cotter, you hvae to take the kingpin out first.
The kingpin cotter only needs a good 'nip' for it to work. If it has come loose, then the nut will be loose too. I check mine during routine maintenance by applying a spanner to them and checking they don't move. if they do, then a nip is all that's required. No real pressure.