NOTE: Some vehicles may be equipped dual piston calipers. The procedure to overhaul the caliper is essentially the same with the exception of multiple pistons, O-rings and dust boots.
CAUTION
NEVER place your fingers in front of the pistons in an attempt to catch
or protect the pistons when applying compressed air. This could result in
personal injury!
NOTE: Depending upon the vehicle, there are two different ways to remove the piston from the caliper. Refer to the brake pad replacement procedure to make sure you have the correct procedure for your vehicle.
Fig. 1: For some types of calipers, use compressed
air to drive the piston out of the caliper, but make sure to keep
your fingers clear
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Fig. 2: Withdraw the piston from the caliper
bore
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Fig. 3: On some vehicles, you must remove the anti-rattle
clip
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Fig. 4: Use a prytool to carefully pry around the
edge of the boot . . .
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Fig. 5: . . . then remove the boot from the caliper
housing, taking care not to score or damage the bore
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Fig. 6: Use extreme caution when removing the piston
seal; DO NOT scratch the caliper bore
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To assemble:
Fig. 7: Use the proper size driving tool and a mallet
to properly seal the boots in the caliper housing
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Fig. 8: There are tools, such as this Mighty-Vac,
available to assist in proper brake system bleeding
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