44 QD134-15
9.13 REPLACING CALIPER SEALS
The following guide is the recommendation for replacing the seals in their calipers:
1. Extend pistons for easy removal unbolt callipers, take out brake pads and place a block in the
caliper to prevent pistons from falling out. Then pump the pedal until all pistons are extended 10-
15mm (or carefully use an airline in the fluid inlet if the callipers are off the vehicle).
2. Remove calipers from vehicle.
3. Remove pistons by hand do not use pliers or any kind of tool that could damage the outside of the
piston.
4. Remove old seals from the caliper body.
5. Clean and inspect the pistons. You are looking to remove all contaminates from the outside of the
pistons and ensure that there is no scratches/damage. You can polish the pistons to get the surface
perfect.
6. Thoroughly clean the calipers use an airline to blow out any contaminates from piston bore and
fluid ways,
7. Grease the new seals and pistons, recommended product for this is:
Rocol Sapphire Aqua-Sil
Alternately soak the seals in brake fluid for 24hrs prior to installation and lubricate the pistons with
brake fluid.
8. Install the new seals in the caliper body ensure that the seal is seated correctly to prevent
damaging them when pushing the pistons in.
9. Push the pistons in by hand, the seal should offer minimal resistance when the piston goes in square.
If resistance is high, the seal is not seated correctly.
10. Install calipers and bleed brakes. Make sure the outside of the calipers are dry then leave overnight.
Check brake calipers after they have been left overnight for any leaks.
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