04-11-2017, 05:26 PM
(This post was last modified: 04-11-2017, 05:27 PM by Dennis Nicholas.)
Hi all
1938/39 Back axle now back on Nippy
Next challenge front axle
It is a big 7 one and I am trying to get the radius arms off to make it more manageable as need to get king pins out to add spacers to take up vertical movement and to clean up and paint all bits (after shot blasting in cabinet so bits must fit in).
The radius arms have a fork that goes above and below the axle with a bolt right through. The bolt head is round and has a small cut out that fits around a small peg to stop the bolt turning.....goodness knows why not just an ordinary hex head bolt or why it is "waisted" in the middle. The bolt is 1/2inch 16 BSF and one has bad teeth so really needs renewing. However I have been unable so far to shift it. I have used a hot air gun to heat the axle and fork end and at least the radius arms now swivel, tightly and slightly, on the bolt (note that means the pegs are U/S). The bolts are therefore seized in the axle.
I have an induction heater tool and can wrap one of the elements round the axle where the bolt goes through but have no experiance as to just how hot you can make the axle before doing irreparable damage. I believe the tool would actually heat it to well over red hot fairly quickly (30 to 60 seconds?) 5/16 studs red in 10 seconds!
So question....how HOT should I go. Hammer and drift on bolt...axle clamped in vice near bolt tried so far.
Can't shift the "cross tube leavers" in the stub axle either so will probably just leave them in and remove cross shaft ball end tapers.
Dennis
1938/39 Back axle now back on Nippy
Next challenge front axle
It is a big 7 one and I am trying to get the radius arms off to make it more manageable as need to get king pins out to add spacers to take up vertical movement and to clean up and paint all bits (after shot blasting in cabinet so bits must fit in).
The radius arms have a fork that goes above and below the axle with a bolt right through. The bolt head is round and has a small cut out that fits around a small peg to stop the bolt turning.....goodness knows why not just an ordinary hex head bolt or why it is "waisted" in the middle. The bolt is 1/2inch 16 BSF and one has bad teeth so really needs renewing. However I have been unable so far to shift it. I have used a hot air gun to heat the axle and fork end and at least the radius arms now swivel, tightly and slightly, on the bolt (note that means the pegs are U/S). The bolts are therefore seized in the axle.
I have an induction heater tool and can wrap one of the elements round the axle where the bolt goes through but have no experiance as to just how hot you can make the axle before doing irreparable damage. I believe the tool would actually heat it to well over red hot fairly quickly (30 to 60 seconds?) 5/16 studs red in 10 seconds!
So question....how HOT should I go. Hammer and drift on bolt...axle clamped in vice near bolt tried so far.
Can't shift the "cross tube leavers" in the stub axle either so will probably just leave them in and remove cross shaft ball end tapers.
Dennis