Brake Caliper Piston, Removing And Installing, Single-Piston Brake: Installing

-- Only clean the surfaces on the pistons and seal with mineral spirits and then dry.

-- Thinly coat the piston and the seal with Lithium Grease:G 052 150 A2 before installing.

-- Insert oil seal into brake caliper.

-- Insert the protective cap -A- into the Press Piece:T10502 -1-.

Fig 1: Identifying Protective Cap And Assembly Tool T 10146/6

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-- Push the protective cap with the assembly tool -1- and the Piston Resetting Tool:T10145 -2- onto the brake caliper so that it is touching the brake caliper all the way around.

Fig 2: Identifying Protective Cap & Piston Resetting Tool T10145

Courtesy of AUDI OF AMERICA, LLC

-- Check seating of protective caps:

Fig 3: Checking Seating Of Protective Caps

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Protective cap must no longer be able to be pulled from brake caliper by hand.

-- Press the piston lightly on the protective cap and lock it in this position, for example using Trim Removal Wedge:3409 -2-.

Fig 4: Blowing Compressed Air Into Protective Cap

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-- Blow compressed air on the protective cap (maximum 3 bar) -1-. This will force the protective cap onto the piston.

A - Vise protective jaws

CAUTION:

Risk Of Damaging The Protective Cap.

Do not tilt the piston.

-- Press the piston into the brake caliper using piston resetting tool -1-.

Fig 5: Identifying Piston Pressed Into Brake Caliper Using Piston Resetting Tool

Courtesy of AUDI OF AMERICA, LLC

Outer sealing lip of protective cap will then engage in piston groove.