Dual piston caliper question

benjy

benjy

Rarely wrenches
Supporting Member
Location
Moab
When a dual piston caliper is removed from the rotor and the brake is repeatedly depressed, should both pistons extend? I understand if one would extend first, but if only one moves at all, does that imply a bad caliper?
 
Yes. There are progressive pistons out there, where one will extend until it grabs and THEN the second one engages but I am assuming you are talkign about your standard Ford-style dual piston caliper-- which I think are just single-stage.
 
Tacoma said:
Yes. There are progressive pistons out there, where one will extend until it grabs and THEN the second one engages but I am assuming you are talkign about your standard Ford-style dual piston caliper-- which I think are just single-stage.
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I agree. They should move together. But if one was sticking, one pad should be worn more then the other. (sticking/stuck side should not wear as fast)

just curious. what vehicle is it for?
 
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