Dismantling, assembling and carrying out basic adjustment of brake band piston B1 - AR27.50-P-0780-10A

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

			As of transmission end no. 3746852 (722.5)
	Self-adjusting brake band piston	As of transmission end no. 3746852 (722.5)	BT27.50-P-0002-01A

Dismantling

Remove brake band piston from brake band piston cover (40).
Press apart locking device (40a) in brake band piston cover (40) using locking ring pliers, removing the pin (37c).

The locking device remains in the brake band piston cover.
Remove snap ring (37b) in brake band piston using a screwdriver and remove disc spring (37a).

Fig 1: Identifying Pin, Locking Device And Brake Band Piston Cover
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Assembling
Insert pin (37c) in brake band piston B1 (37).
Slide Belleville spring washer (37a) over pin (37c) until the it abuts the brake band piston (37).
Insert snap ring (37b).
Press the assembled brake band piston B1 (37) into the brake band piston cover (40) until it locks in position audibly.

Fig 2: Identifying Pin, Brake Band Piston B1, Belleville Spring Washer And Snap Ring
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.