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How do you push the front caliper piston back after changing brakes on vectra?
Wiki User
∙ 14y ago
Use a "C" clamp to collapse the caliper piston.
Use one of the old pads across the face of the piston. If you use the clamp on the bottom of the piston it is possible to crack the piston. Using the old pad spreads the pressure to both sides of the piston.
That is if the piston is a cup. If it is solid on the face then it screws in, but I believe this type is only used on the rear brakes of cars.
Wiki User
∙ 14y ago
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How do you push the rear caliper piston back after changing the brake pads on a vauxhall vectra with automatic handbrake adjuster.i have tried pushing it back but it wont budge.?
Try turning it with long nose pliers
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How do you push the rear caliper piston back after changing the brake pads on a vauxhall vectra with automatic handbrake adjusteri have tried pushing it back but it wont budge?
Why you can't push the piston back.The majority of calipers that incorporate a hand brake mechanism have an adjuster inside which compensates for pad wear. Forcing the piston back can damage this adjuster. Ideally you should use a piston wind back tool - this rotates the piston and pushes it back at the same time.You can get away without this tool, but do NOT use grips on the hydraulic surface! Most handbrake calipers require you to rotate the piston clockwise, do this a turn at a time, then push piston back gently (if you apply the handbrake lever slightly by hand - you'll feel when you've taken up the play)Saab 9000, Volvo 480 and Mazda handbrake calipers have an hex key adjuster hidden behind a bung - use a 4mm hex key to wind/adjust pistons on these type of calipers.Isn't the internet a wonderful thing when we're stuck - Mrbrakes.
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