Calliper holder pin seized

[Athame57]

I dismantled the front brake callipers on my CB400F2 this morning after noticing the calliper holder wasn't being effected by the spring that is supposed to position it, that hasn't actually stopped the brakes working so it may have been like that for years even. My problem is the pin is so seized I'm wondering what to do, I've already caused some Sunday morning complaints with my efforts to release it. I've also damaged a park bench downstairs using the slats for a vice, I don't have the luxury of a workshop. I end up going on the CMSL diagram to make sure there is a pin going through there. Any suggestions? 

[Trigger]

Take it to a engineering shop and they will heat it to get it apart. The pin doesn't get worn too much, it is always the bushes in the arm. 

[Athame57]

Take it to a engineering shop and they will heat it to get it apart. The pin doesn't get worn too much, it is always the bushes in the arm. 

Thanks Graham, I'm going to take that advice. I've just bent a large screwdriver I was using for leverage. The pin did move with a lot of noise for a part turn, but I think it is time to give up trying to do this myself! 

[Trigger]

You need the right tools 
I had a couple of 750 here a couple of weeks ago and they would not budge even with heat. If that happens it is time to drill the pin out 

[taysidedragon]

Take it to a engineering shop and they will heat it to get it apart. The pin doesn't get worn too much, it is always the bushes in the arm. 

Thanks Graham, I'm going to take that advice. I've just bent a large screwdriver I was using for leverage. The pin did move with a lot of noise for a part turn, but I think it is time to give up trying to do this myself! 

If you have some movement in the pin you should be able to get some releasing oil in there and keep loosening it. Let it soak for a while and then keep wiggling it back and forth. The movement should gradually improve until it comes out. It's not easy without a bench or a vice but worth a go.
Have you got space for a Workmate portable folding bench/vice? Very useful if you haven't got anything else.

[Athame57]

Have you got space for a Workmate portable folding bench/vice? Very useful if you haven't got anything else.

My 'vice' is the slats in a park bench downstairs! Honestly it's a lost cause, the effort to move it at all caused loud squeaking and I had to sit down and recover, my mild COPD suddenly stops being mild.  That means it is time to get help or replace it.

[McCabe-Thiele (Ted)]

You could try soaking it overnight in Diesel in an old Tupper-wear type container.

Alternatively my offer stands.

[Multiman]

I did mine recently which was seized solid.
Sprayed with plusgas let overnight.
Clamped in vice and a bit of heat shifted it.
Happy to do it for you but it would probably be cheaper to take to a local garage than post it to me and back.

Roo pointed out that there should be two o-rings, above and below the bracket to help keep out the road crud.
Mine didn't have any which is probably one reason why it was seized.
91259-333-000, DSS and Fowlers have them but at nearly £5 each! plus postage.
Not sure if Julie does them.
Good luck

[Athame57]

It's out!  Sounds like a bad tooth don't it? The guy who did it for me with heat and some elbow grease is the same guy who welded up my split main stand for just £5.00. The job he did today for me he did for free. Well, he is a resource obviously so deserves a plug. Madeira Auto Body Repairs at the Railway Arches, Brady St. London E1. Ted, thanks for your kind offer though! 

[taysidedragon]

Good news. Whatever you put back on the bike, keep it well greased or you'll be doing all this again. 😉

[K2-K6]

I did mine recently which was seized solid.
Sprayed with plusgas let overnight.
Clamped in vice and a bit of heat shifted it.
Happy to do it for you but it would probably be cheaper to take to a local garage than post it to me and back.

Roo pointed out that there should be two o-rings, above and below the bracket to help keep out the road crud.
Mine didn't have any which is probably one reason why it was seized.
91259-333-000, DSS and Fowlers have them but at nearly £5 each! plus postage.
Not sure if Julie does them.
Good luck

Interesting point about plusgas as I find that effective too. For information though, it's 90% Kerosine and 8% mineral oil if you've something big to soak and need larger quantity.

[McCabe-Thiele (Ted)]

Pleased to see you have sorted it George.

[Multiman]

Great its sorted

[Trigger]

It's out!  Sounds like a bad tooth don't it? The guy who did it for me with heat and some elbow grease is the same guy who welded up my split main stand for just £5.00. The job he did today for me he did for free. Well, he is a resource obviously so deserves a plug. Madeira Auto Body Repairs at the Railway Arches, Brady St. London E1. Ted, thanks for your kind offer though! 

You can't beat a old railway arch. I had a arch Blackfriars bridge back in the good old days, all the other arches in that row did FX4 repairs. Most probably some trendy wine bar now 

[McCabe-Thiele (Ted)]

The railway arches in Derby were all demolished or bricked up after one collapsed under Friargate Station in the 1980's iirc.

There were some great firms at sensible prices.