Multidisk Brake, Basic Function - GF27.51-P-2000A

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Model all with transmission 725

Example illustration of automatic transmission with multidisk brakes

Fig 1: Multidisk Brake B05; B06; B08 Components Location - Model All With Transmission 725

Courtesy of MERCEDES-BENZ USA

Shown on automatic transmission with multidisk brakes

Courtesy of MERCEDES-BENZ USA

Overview

This document contains information on:

General
Function

General

The multidisk brakes are used for braking and hold the ring gear, sun gear or planetary gear of a planetary gear set. These are supported against the transmission housing (4) to transfer the torque.

Function

A multidisk brake consists of several inner plates (6) on an inner plate carrier and outer plates (5) on an outer plate carrier. The external plate carrier is permanently connected to the transmission housing (4). In the multidisk brakes, double-sided disks (disks coated on both sides) are used.

For shifting, the different parts of the planetary gear set are held by hydraulic pressure being exerted on the multidisk brakes.