AlexXtreme
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| posted on 18/1/16 at 05:25 PM |
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Changing Callipers on G27 with Triumph hubs
I had a puzzling weekend..I am trying to remove a calliper which is partially seized to either get serviced by this company
Pics of the caliper / discs are below. The hubs are Triumph and the callipers are AP 4 potters. It looks as though because of how the calliper is
mounted to the supporting plate, I need to undo the centre bearing nut and take off the complete unit to get the calliper off. Does this sound
right?
If so what process do I need to go through for tightening the centre nut when replacing the complete unit, eg is there a torque?
https://picasaweb.google.com/108950503714571978236/Jan182016?authuser=0&authkey=Gv1sRgCN-qy8makpvPOw&feat=directlink
http://www.brakecaliperspecialists.uk/brake-caliper-refurbishment/
or will replace the seals my self
Hope the link to the pictures works :-)
Alex
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pewe
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| posted on 18/1/16 at 06:00 PM |
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On a normal Triumph set-up there are two caliper retaining bolts top and bottom at the back of the caliper.
In your photo there's a big bolt, albeit sticking out, just in front of the metal balance pipe.
Are you sure this isn't the retaining bolt?
Looks like there's only one bolt though....
HTH.
Cheers, Pewe10 
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theconrodkid
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| posted on 18/1/16 at 06:09 PM |
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as pewe says,that bolt looks a bit of a bodge to me but it,s in the right place for the top bolt.
who cares who wins
pass the pork pies
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cliftyhanger
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| posted on 18/1/16 at 06:31 PM |
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Looks like the calliper mounts are outside the uprights in the pics, and rather different to a normal spitfire etc setup.
However, you may indeed need to take the hub off the stub axle. I am guessing the boltheads are the disc side of the calliper to get clearance? In the
Triumph application the upright is threaded. (although I am beginning to doubt my own sanity now!) but that may have been drilled out.
It you undo the hub nut, regrease teh taper bearings when re-assembling, and nip the bearing up tight. Just. Then back off a fraction to the first
position you can get a new splitpin in. usually a choice of two holes, so about 1/2 a flat. There should be a very tiny amount of play you can feel
with the wheel attached.
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gremlin1234
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| posted on 18/1/16 at 06:59 PM |
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quote:
Originally posted by cliftyhanger In the Triumph application the upright is threaded. (although I am beginning to doubt my own sanity
now!)
yea the normal triumph ones are threaded in the casting
http://www.rimmerbros.co.uk/Item--i-GSJ266
we really need to see the bottom mounting as well.
my current thought is they might be herald drum brake uprights,
also looks likely to be a real pain to blead the brakes.
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britishtrident
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| posted on 18/1/16 at 07:11 PM |
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Looks like a homebrew conversion Princess calipers on a GT6/Vitessse upright.
After slakening the caliper retaining nuts will need to take the dust cap off remove the split pin remove the bearing retaining nut, catch the outer
bearing and thrust washer in a clean dry cloth as you pull the hub outwards.
Refitting is the reverse but make sure you keep the taper roller bearing free from grit, bearing adjustment is simple lightly tighten the big hub nut
spin the hub a couple of turns then slacken the nut back 1/3 to 1/2 a turn and replace the split pin.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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AlexXtreme
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| posted on 18/1/16 at 10:43 PM |
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Thanks Guys you are spot on in your replies... I will go for it with more confidence now!
As I thought I will need to take the hub off as the calipers are on the disc side of the mounting. There are two calliper mounting bolts
Cheers
Alex
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britishtrident
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| posted on 18/1/16 at 11:31 PM |
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quote:
Originally posted by gremlin1234
quote:
Originally posted by cliftyhanger In the Triumph application the upright is threaded. (although I am beginning to doubt my own sanity
now!)
yea the normal triumph ones are threaded in the casting
http://www.rimmerbros.co.uk/Item--i-GSJ266
we really need to see the bottom mounting as well.
my current thought is they might be herald drum brake uprights,
also looks likely to be a real pain to blead the brakes.
It is Vitesse/GT setup different from the Herald/Spitfire ---- unlike the he Herald caliper bracket was bolt on and a beefer stub axle.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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cliftyhanger
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| posted on 19/1/16 at 06:36 AM |
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quote:
Originally posted by britishtrident
quote:
Originally posted by gremlin1234
quote:
Originally posted by cliftyhanger In the Triumph application the upright is threaded. (although I am beginning to doubt my own sanity
now!)
yea the normal triumph ones are threaded in the casting
http://www.rimmerbros.co.uk/Item--i-GSJ266
we really need to see the bottom mounting as well.
my current thought is they might be herald drum brake uprights,
also looks likely to be a real pain to blead the brakes.
It is Vitesse/GT setup different from the Herald/Spitfire ---- unlike the he Herald caliper bracket was bolt on and a beefer stub axle.
Ah, not always...
the early spitfires, plus heralds that were disc braked but used the same uprights as teh drum type. plus the vitesse 1600 (again herald/spit sized
type 12 callipers and discs) all had the bolt on calliper mount. Those are rather in demand still as they match the 4 pot princess calliper and ford
stuff. And are a straight swap onto the GT6 uprights.
So you can get a right old mix and match going on!
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AlexXtreme
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| posted on 19/1/16 at 10:18 PM |
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I have a picture of the hub below.... it was xxxxxx cold in the garage this evening for us weak southerns!
https://goo.gl/photos/PbxwfLkz9dUp2JzN8
Hope this shows enough?
Cheers
Alex
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AlexXtreme
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| posted on 19/1/16 at 10:20 PM |
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Also planned to buy a grease gun and lubricate the hull with the grease nipples... some where I heard that using gearbox oil is preferable to grease.
Has alone else heard this?
Alex
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pewe
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| posted on 19/1/16 at 10:28 PM |
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Not as far as I know.
What do require oil rather than grease ( if they are still Tiumph) are the lower swivels ( IIRC also known as trunnions)
HTH
Cheers, Pewe10
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gremlin1234
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| posted on 19/1/16 at 10:53 PM |
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oil for the trunion, grease for the wheel baring
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britishtrident
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| posted on 19/1/16 at 11:44 PM |
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Gear oil but not hypoid gear oil.
Hypoid gear oil erodes copper-zinc alloys
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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AlexXtreme
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| posted on 20/1/16 at 08:41 AM |
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I meant the trunnion not the wheel hearing... thanks I did not know about the Hypoid gear oil!
is a grease gun with oil in the best method for this bearing? If so how do you stop it going everywhere?
Alex
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AlexXtreme
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| posted on 20/1/16 at 12:41 PM |
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Just brought a Clarke 120cc grease gun so will give it a go this w/end!
Alex
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AlexXtreme
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| posted on 21/1/16 at 11:47 AM |
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Does anyone recognise the callipers (other than APM Lockhead!) and where can I get a calliper seal reconditioning kit??
Godspeed have quoted £90 for one kit (the callipers were original brought from them... :-( ).
Cheers
Alex
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pewe
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| posted on 21/1/16 at 12:20 PM |
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Try Brake Parts normally pretty helpful.
Cheers, Pewe10
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AlexXtreme
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| posted on 21/1/16 at 12:57 PM |
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Hi Pewe, thanks! Tried them and they could not help :-(... they wanted a make of car etc as these are none std does not help!
Questmead are also trying .
Alex
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pewe
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| posted on 21/1/16 at 01:03 PM |
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I'm not certain but they look like Austin Princess calipers.
If you google "show me Austin Princess calipers" there's a pic and the markings look very similar.
Brake parts should then be able to help or there's Past Parts who do a wide range.
Cheers, Pewe10
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