 Front Brake Caliper Identification, Which side? |
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| FlatSix |
  May 2 2022, 05:10 AM
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#1
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English Member  Group: Members Posts: 191 Joined: 14-January 03 From: Poole, England Member No.: 144  |
I've just got my late ('76) front brake calipers back from being rebuilt but I don't know which is the left (drivers) side and which is the right (passenger) side.
I can see a difference in that one of the bleed screws is recessed, does this go to the top or the bottom? Picture attached. Please can all respondents agree, I don't need anymore confusion!  |
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| bdstone914 |
May 2 2022, 06:58 AM
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#2
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bdstone914 Group: Members Posts: 4,536 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
@flatsix
This is the piston orientation. If not installed correctly the piston tops will wear at an angle. Attached thumbnail(s) 
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| PatMc |
May 2 2022, 07:56 AM
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#3
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Member Group: Members Posts: 120 Joined: 27-June 21 From: Long Beach Member No.: 25,669 Region Association: None 
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It appears as if those were rebuilt using the incorrect pistons. As the posters above me have pointed out, the pistons should have a cutout over about 30% of the face that is designed to reduce leading edge bit of the pad to prevent noise.
The pistons that your calipers have appear to be flat, with no cutout. The OEM pistons used an anti-knockback mechanism along with a pin in the caliper casting to pre-load the pads a tad bit against the rotor. These are not available anymore and if a piston needs to be replaced due to rust or pitting, a cup type piston is typically used and the pin removed from the caliper....these work just fine as long as the wheel bearings are adjusted correctly. Here's what the correct replacement should look like. https://www.ebay.com/itm/284791766992 If your pistons are flat (looks like it from the picture, but they might be oriented wrong and hidden)...they'll still work OK, but you may have some noise. |
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Posts in this topic
FlatSix Front Brake Caliper Identification May 2 2022, 05:10 AM
914Sixer Calipers were designed to be interchangeable. The... May 2 2022, 06:03 AM
Eric_Shea Wrong pistons. Cheap Chinese seal kits (original ... May 2 2022, 06:12 PM PatMc
Wrong pistons. Cheap Chinese seal kits (original... May 3 2022, 01:41 PM |
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