Author [ES] [PL] [PT] [IT] [DE] [FR] [NL] [DK] [SE] [FI] [NO] Topic: Seized front calliper.  (Read 3093 times)

0 Members and 1 Guest are viewing this topic.

Offline Iain

  • Trophy Pro
  • ***
  • Posts: 120
    • View Profile
  • Bike: Trophy SE
  • City / Town: Stornoway
  • Country: UK
Seized front calliper.
« on: February 27, 2016, 12:58:34 pm »
Can I unseize one of my front callipers without removing it completely?
Honda VFR 2002
Sprint ST 2007
Sprint ST 2009
Sprint GT 2011
Trophy SE 2013

Offline Coconut

  • Trophy God
  • *****
  • Posts: 9341
    • View Profile
  • Bike: 2017 Trophy SE
  • City / Town: South Birmingham
  • Country: UK
Re: Seized front calliper.
« Reply #1 on: February 27, 2016, 01:10:01 pm »
What has actually seized ?

Is it one or more of the caliper pistons - there are four pistons in each of the two front calipers,
or is it that the wheel won't turn after being laid up for winter ? ...
in which case it might be that one or more of the pads has "stuck" to the disc ?

Exploded parts drawings here : World of Triumph



« Last Edit: February 27, 2016, 01:14:55 pm by Coconut »

Offline Iain

  • Trophy Pro
  • ***
  • Posts: 120
    • View Profile
  • Bike: Trophy SE
  • City / Town: Stornoway
  • Country: UK
Re: Seized front calliper.
« Reply #2 on: February 27, 2016, 01:43:18 pm »
Two of the pistons in one of the callipers has seized. I've got the Caliper off now and when pumping the brakes the pistons don't move.

Just reading back over my old Haynes Sprint manual it says not to try and remove the piston with pliers. It says the calliper should be replaced with a new one.
Honda VFR 2002
Sprint ST 2007
Sprint ST 2009
Sprint GT 2011
Trophy SE 2013

Offline Coconut

  • Trophy God
  • *****
  • Posts: 9341
    • View Profile
  • Bike: 2017 Trophy SE
  • City / Town: South Birmingham
  • Country: UK
Re: Seized front calliper.
« Reply #3 on: February 27, 2016, 02:45:52 pm »
Using pliers or grips on the pistons is not recommended
as you are likely to cause damage to the piston surface, rendering it unusable.

If you've removed the caliper from the mounting but have left the brake hose attached,
try using Clamps / Bars to prevent the "good" pistons from moving,
which will then divert more pressure to the struck piston(s)
and hopefully get them moving again when you operate the brake lever.

Once they are moving it's a case of carefully expellng them, cleaning them up,
examining and replacing pistons / seals as necessary, of course being very careful
not to get ANY brake fluid onto ANY painted surfaces !

One complete new Caliper will cost over £450 !
A new Piston and Seal set will be around £58 per Caliper.







Offline Iain

  • Trophy Pro
  • ***
  • Posts: 120
    • View Profile
  • Bike: Trophy SE
  • City / Town: Stornoway
  • Country: UK
Re: Seized front calliper.
« Reply #4 on: February 27, 2016, 04:41:10 pm »
Thanks Coconut, Does the piston & seal set have to be Triumph specific?
Honda VFR 2002
Sprint ST 2007
Sprint ST 2009
Sprint GT 2011
Trophy SE 2013

Offline Coconut

  • Trophy God
  • *****
  • Posts: 9341
    • View Profile
  • Bike: 2017 Trophy SE
  • City / Town: South Birmingham
  • Country: UK
Re: Seized front calliper.
« Reply #5 on: February 27, 2016, 05:14:20 pm »
I don't know the answer to that one  :431:

The Calipers are "Nissin" brand as far as I'm aware.

Caliper rebuild kits are available for the rear brake caliper from other suppliers,
such as Wemoto.com but they don't list kits for the front.

Might be worth a Phone call to them though ? .... 01273 597072

Cheers  :821:


Offline Mustangpilot

  • Trophy Pro
  • ***
  • Posts: 148
    • View Profile
  • Bike: TT
  • City / Town: DH
  • Country: Netherlands
Re: Seized front calliper.
« Reply #6 on: February 27, 2016, 06:06:55 pm »
If my tortured (single malt) old memory capacity is still functioning correctly,  :087: I think that I faintly remember  :112: that the Trophy front brake caliper parts are same as the post 2006 Yamaha FJR1300 brake parts
Parts for the rear caliper are very common on many Triumph models such as Sprint ST 1050, Explorer and even the 865 Bonneville.


« Last Edit: February 27, 2016, 06:21:54 pm by Mustangpilot »
2014 Lunar silverTriumph Trophy
2016 Bonneville T120 Black

Offline Iain

  • Trophy Pro
  • ***
  • Posts: 120
    • View Profile
  • Bike: Trophy SE
  • City / Town: Stornoway
  • Country: UK
Re: Seized front calliper.
« Reply #7 on: February 28, 2016, 01:48:26 pm »
Got it sorted, thanks all.
Honda VFR 2002
Sprint ST 2007
Sprint ST 2009
Sprint GT 2011
Trophy SE 2013