gf4200p9900a

Brakes, basic function

Type gf · topic 42.00 · version 0102 · 2020-07-11

Applies to: Model all (CAR)

Where it sits

Function group 2 Chassis › 42 Brakes - hydraulic and mechanical systems › 42.00 General — Series 900 (models 9**) · Series 902 (models 9**) · Series 904 (models 918, 919, 924, 925, 938, 943, 957) · Series 906 (models 917, 918, 924, 953)

EinPAS 21 Brakes/vacuum system/compressed-air system › 21.15 Service brake/vacuum system › 21.15.1 Basic information — Series 900 (models 9**) · Series 902 (models 9**) · Series 904 (models 918, 919, 924, 925, 938, 943, 957) · Series 906 (models 917, 918, 924, 953)

EinPAS 21 Brakes/vacuum system/compressed-air system › 21.16 Parking brake › 21.16.1 Basic information — Series 900 (models 9**) · Series 902 (models 9**) · Series 904 (models 918, 919, 924, 925, 938, 943, 957) · Series 906 (models 917, 918, 924, 953)

EinPAS 21 Brakes/vacuum system/compressed-air system › 21.17 Trailer brake › 21.17.1 Basic information — Series 900 (models 9**) · Series 902 (models 9**) · Series 904 (models 918, 919, 924, 925, 938, 943, 957) · Series 906 (models 917, 918, 924, 953)

EinPAS 21 Brakes/vacuum system/compressed-air system › 21.23 Regenerative braking system › 21.23.1 Basic information — Series 900 (models 9**) · Series 902 (models 9**) · Series 904 (models 918, 919, 924, 925, 938, 943, 957) · Series 906 (models 917, 918, 924, 953)

EinPAS 21 Brakes/vacuum system/compressed-air system › 21.30 Frequent-stop brake › 21.30.1 Basic information — Series 900 (models 9**) · Series 902 (models 9**) · Series 904 (models 918, 919, 924, 925, 938, 943, 957) · Series 906 (models 917, 918, 924, 953)

Also applies to engines/gearboxes: 139 ***, 254 ***, 256 ***, 272 ***, 276 ***, 282 ***, 457 9**, 541 9**, 542 9**, 608 ***, 700 4**, 700 420, 700 421, 700 422, 700 423, 715 3**, 715 5**, 722 6**, 722 9**, 724 ***, 724 0**, 724 033, 724 044, 724 045, 724 1**, 724 103, 724 114, 724 115, 724 120, 725 ***, 725 0**, 725 035, 725 037, 725 038, 725 085, 725 1**, 739 390, 739 391, 739 395, 739 396, 739 397, 739 398, 739 399, 740 698, 743 3**, 743 4**, 743 498, 746 971, 924 9**, 924 910, 925 9**, 926 9**

GF42.00-P-9900A

Brakes, basic function

22.06.2020

Model

all (CAR)

Overview

This document contains information on:

General

Function

General

The brake denotes the entirety of all brake systems installed on a vehicle, and its purpose is as follows:

to maintain or reduce speed

to bring the vehicle to a standstill

to keep the vehicle stationary

Function

Service brakes

The service brake is an assembly of the brake system used to reduce the speed of the vehicle (until stationary if necessary). The driver doses the braking effect of the service brake via the brake pedal. The service brake acts on all wheels of the vehicle.

Parking brake

The parking brake secures a stationary or parked-up vehicle against rolling away, even on inclined roadways. Unlike the service brake, the parking brake acts on the brake system of one axle. Usually the rear axle. Activation takes place manually via the electric parking brake switch or automatically depending on the driving condition.

Brake and traction system

The brake and traction system (e.g. ABS) assists the driver in suddenly occurring dangerous situations or in critical driving situations, and thus ensures active safety. It includes various subsystems that have a checking, optimizing or regulating function.

Additional basic functions

Parking brake, basic function

Model all (CAR)

GF42.20-P-1002A

Regenerative brake system, basic function

Model all (CAR)
with code ME01 (Electric motor)
Model all (CAR)
with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))
Model all (CAR)
with code ME10 (Hybrid vehicle)

GF42.22-P-1008A

Brake and traction system, basic function

Model all (CAR)

GF42.47-P-1000A

Control units

Electronic Stability Program control unit, basic function

Model all (CAR)

GF42.45-P-9890A

Components

Accelerator pedal sensor, basic function

Model all (CAR)

GF30.20-P-2000A

Brake light switch, basic function

Model all (CAR)

GF42.10-P-2001A

Brake booster, basic function

Model all (CAR)

GF42.31-P-2004A

Traction system hydraulic unit, basic function

Model all (CAR)

GF42.50-P-2000A

Referenced documents