Roach
Part of things
Posts: 717
|
|
May 14, 2021 16:16:06 GMT
|
Can any of you lovely people tell me what this caliper is off of? It came as part of an empi disc brake kit for my beetle..... but I think one is faulty, and they don’t supply them separately. That’s a very long story cut super short.... but basically I have an undrivable beetle and a 3 week lead time for a new kit. So here is one of them, they are stamped L and R so they are handed... they have to be off something else.
|
|
|
|
|
penguin45
Part of things
Still welding......
Posts: 70
|
|
May 14, 2021 20:37:23 GMT
|
You may be out of luck. EMPI 22-2956B is only listed for Beetles. No further cross references.
|
|
|
|
|
Brake caliper identification fr€$h&m1nt¥
@freshandminty
Club Retro Rides Member 99
|
May 14, 2021 20:58:11 GMT
|
When you say “ they have to be off something else” do you mean you’re hoping that they also fit another car or do you mean you’ve bought them and they don’t fit?
Just wondering if they’re for a different year model beetle or other components have been swapped over on your car in the past?
|
|
|
|
Dez
Club Retro Rides Member
And I won't sit down. And I won't shut up. And most of all I will not grow up.
Posts: 11,712
Club RR Member Number: 34
|
Brake caliper identification Dez
@dez
Club Retro Rides Member 34
|
May 14, 2021 21:03:44 GMT
|
No beetle has single piston sliding calipers as standard. They’re usually a 2 piston design.
They could be a mild rehash on an existing caliper with specific part numbers. The fact they have empibcast into them doesn’t look favourable though. Bearing in mind they’re for solid discs, they look a *bit* like mk2/3/4 golf but without the handbrake mech. One of those would be cheap enough s/h to buy for comparison purposes.
|
|
|
|
Rich
Club Retro Rides Member
Posts: 6,235
Club RR Member Number: 160
|
Brake caliper identification Rich
@foxmcintyre
Club Retro Rides Member 160
|
May 14, 2021 22:30:18 GMT
|
Any ref. numbers on the pads? That may help narrow it down.
|
|
|
|
adam73bgt
Club Retro Rides Member
Posts: 4,864
Club RR Member Number: 58
|
Brake caliper identification adam73bgt
@adam73bgt
Club Retro Rides Member 58
|
May 14, 2021 23:09:02 GMT
|
That design of caliper was often used by TRW or Bosch but they're also made by a myriad of companies these days.
Cross referencing in a brake pad catalogue going off the brake pad shape/dimensions may get you close
What about it is faulty?
|
|
|
|
ChasR
RR Helper
motivation
Posts: 10,191
Club RR Member Number: 170
|
Brake caliper identification ChasR
@chasr
Club Retro Rides Member 170
|
|
They look bespoke.
I can’t think of many handbrake calipers which have that large a piston.
Can you measure the piston up on its diameter?
As Adam said, what is the problem?
|
|
Last Edit: May 15, 2021 7:09:10 GMT by ChasR
|
|
|
|
|
Look very much like the ones on the rear of my C4 A6, except they have a handbrake mech. Those has 57mm pistons.
Might be worth speaking to Bigg Red who can probably find you parts if not the whole thing.
Nick
|
|
1967 Triumph Vitesse convertible (old friend) 1996 Audi A6 2.5 TDI Avant (still durability testing) 1972 GT6 Mk3 (Restored after loong rest & getting the hang of being a car again)
|
|
|
|
|
Look a lot like the ones on the rear of my C4 A6, though those have a handbrake mech.
They have 57mm pistons.
Might be worth speaking to Bigg Red? They will probably be able provide parts, if not the whole thing.
Nick
|
|
1967 Triumph Vitesse convertible (old friend) 1996 Audi A6 2.5 TDI Avant (still durability testing) 1972 GT6 Mk3 (Restored after loong rest & getting the hang of being a car again)
|
|
Roach
Part of things
Posts: 717
|
|
May 15, 2021 16:07:50 GMT
|
I was supplied this kit fitted to the beam I purchased.
So I’m hoping it can be fixed without me having to put my hand in my pocket.
The problem is the piston won’t let off the disc when the brakes are applied, it only releases if you crack the bleed or physically prize the pads open.
Empi don’t supply the calipers separately apparently, and full kits are on back order.... hence I was hoping to find what they were from as a last resort fix.
|
|
|
|
|
|
|
May 15, 2021 17:29:44 GMT
|
Have you had a look on Vw heritage ? Looks like they sell individual EMPI ones.
|
|
|
|
|
|
May 15, 2021 17:45:23 GMT
|
I was supplied this kit fitted to the beam I purchased. So I’m hoping it can be fixed without me having to put my hand in my pocket. The problem is the piston won’t let off the disc when the brakes are applied, it only releases if you crack the bleed or physically prize the pads open. Empi don’t supply the calipers separately apparently, and full kits are on back order.... hence I was hoping to find what they were from as a last resort fix. Hi, That doesn't sound like a caliper problem, it sounds like a problem 'upstream'. Like a flexible hose that has partially collapsed and acting like a one way valve. Or it could be a problem at the master or servo. If it's one side then I would say it's a flexible hose. If it's both sides then master or servo. Colin
|
|
|
|
Roach
Part of things
Posts: 717
|
|
May 15, 2021 19:11:53 GMT
|
I was supplied this kit fitted to the beam I purchased. So I’m hoping it can be fixed without me having to put my hand in my pocket. The problem is the piston won’t let off the disc when the brakes are applied, it only releases if you crack the bleed or physically prize the pads open. Empi don’t supply the calipers separately apparently, and full kits are on back order.... hence I was hoping to find what they were from as a last resort fix. Hi, That doesn't sound like a caliper problem, it sounds like a problem 'upstream'. Like a flexible hose that has partially collapsed and acting like a one way valve. Or it could be a problem at the master or servo. If it's one side then I would say it's a flexible hose. If it's both sides then master or servo. Colin I’ve swapped the flexis from side to side and the problem remains. Brand new ATE master cylinder. And the pedal has been set correctly. just one side, the other side seems free(ish) but I’m putting that down to all brand new kit that isn’t yet worn in... but the near side binds badly, so much so the mile test run turned the disc blue.
|
|
|
|
Dez
Club Retro Rides Member
And I won't sit down. And I won't shut up. And most of all I will not grow up.
Posts: 11,712
Club RR Member Number: 34
|
Brake caliper identification Dez
@dez
Club Retro Rides Member 34
|
May 15, 2021 19:28:06 GMT
|
Sounds like a drum brake master cyl on a Disc brake car.
|
|
|
|
Roach
Part of things
Posts: 717
|
|
May 15, 2021 20:07:13 GMT
|
Sounds like a drum brake master cyl on a Disc brake car. I thought that. But I have friends who run single circuit m/c’s with front discs and have no issues.
|
|
|
|
jpsmit
Posted a lot
Posts: 1,254
Member is Online
|
|
|
How old are the flexis?
|
|
|
|
Roach
Part of things
Posts: 717
|
|
|
|
|
|
|
squonk
Part of things
Posts: 857
|
|
May 16, 2021 11:08:26 GMT
|
A brake caliper is a simple device which consists purely of a chamber with a piston and a hole to let fluid in and out. There are no valves within the caliper to control the flow of fluid. The fact that your brakes apply and stick but release when the bleed screw is undone suggests that pressure is being held within the caliper. As there is nothing inside the caliper that can retain the pressure this points to a problem outside of the caliper. Something is not letting fluid return into the master cylinder reservoir. As has previosly been said, a hose colapse that makes it behave like a one way valve could cause this.
However, I am concerned that you imply the other brake is also dragging. Being new should not create this problem - the brakes should work perfectly as soon as fitted if they are correctly bled and set up. The fact that the other brake is dragging could well indicate a master cylinder problem and the other caliper isn't locking simply because there is a small amount of air in the system on that side (the air could compress enough to allow the caliper to partially release but still cause it to drag).
I'm 100% sure that there is nothing wrong with the caliper. The dragging of the other brake really does point to a master cylinder issue.
|
|
Last Edit: May 16, 2021 11:08:59 GMT by squonk
2004 Chevrolet Avalanche Z71 2005 Mercedes CLK320 Cabriolet 1996 Mercedes C180 Elegance Auto Saloon 1996 Rover 620Ti (Dead fuel pump) 1992 Toyota HiLux Surf 1987 Range Rover Vogue (Rusty) 1992 Range Rover Vogue SE (More Rusty) 2006 Chrysler Grand Voyager 2008 Corsa 1.4 Design
|
|
|
|
May 16, 2021 11:48:18 GMT
|
some Drum braked cars have a residual pressure valve in the system to hold pressure for a better pedal and the large springs in a drum brake will easily overcome the pressure. calipers wont.
is the master cylinder designed for drums or is there some sort of valve somewhere?
just a thought as i have come across this before on other vehicles with drum to disc conversions.
|
|
|
|
ChasR
RR Helper
motivation
Posts: 10,191
Club RR Member Number: 170
|
Brake caliper identification ChasR
@chasr
Club Retro Rides Member 170
|
May 16, 2021 13:18:28 GMT
|
Sounds like a drum brake master cyl on a Disc brake car. I thought that. But I have friends who run single circuit m/c’s with front discs and have no issues. They are different. Drum brakes have pressure valves IIRC in them, so you need a disc brake master to work with it. Otherwise, they will just keep binding on.
|
|
Last Edit: May 16, 2021 13:18:49 GMT by ChasR
|
|
|