Piston For FN 3 Brake Caliper, Removing and Installing

Piston for FN 3 brake caliper, removing and installing

Special tools, testers and auxiliary items required





^ Disassembly wedge 3409





^ Piston resetting tool T10145





^ Assembly device for protective cap T10146/1

Removing





- Force piston out of brake caliper housing using compressed air.

Set a piece of wood into the valley, so that the piston is not damaged.





- Remove protective cap from brake caliper with disassembly wedge 3409.

A - Protective covers





- Remove oil seal with disassembly wedge 3409.

When removing make sure that the surface of the cylinder is not damaged.

Installing
- The surface of the piston and seal must only be cleaned with mineral spirits and then dried.
- Thinly coat piston and seal with assembly paste G 052 150 A2 before inserting.
- Insert oil seal into brake caliper.





- Set protective cap - A - in assembly device T10146/1 - 1 -.





- Press protective cap with assembly device T10146/1 - 1 - and piston resetting tool T10145 - 2 - into brake caliper applying equal pressure all around.

Check that the protective cap is completely seated:





- It should no longer be possible to remove the protective cap from the brake caliper by hand.





- Press piston lightly against protective cap and lock it into position, e.g. with disassembly wedge 3409 - 2 -.

To avoid damaging the seal sleeve, do not angle piston.
- Inflate protective cap with pressurized air (max. 3 bar) - 1 -. Thereby the protective cap is forced over the piston.

A - Protective covers





- Press piston into brake caliper with piston resetting tool T10145 - 1 -.

The outer seal lip of the protective cap slips into the groove on the piston.