Note. Separate characteristics are also given in the text of the Chapter and, if they are mandatory, are highlighted in bold.
Common parameters
Design | Hydraulic, double-circuit with a vacuum booster. Electronic anti-skid system (stability stabilization - ESP), emergency brake booster (BAS) and anti-lock brakes (ABS) |
Brake mechanisms | Disk |
Brake discs | Composite aluminium+steel, ventilated on the front wheels, perforated one-piece on the rear wheels |
Parking brake foot, with pedal drive |
Front wheel brakes
The thickness of the friction linings of the rear brake pads, mm | |
Models 140.032/033 to 12.91, 140.134 to 12.91 and 140.135 | |
New pads | 18.5 |
Permissible wear | |
Substrate not included | 2 |
Subject to substrate (for maintenance) | 13 |
Operation of the wear indicator | 2.5 |
Models 140.134 to 12.91 | |
New pads | 28 |
Permissible wear, taking into account the substrate | 25.4 |
Permissible wear for maintenance | 26 |
Models 140.28/042/043/050/051/056/057/ 063/070/076/135, 140.032/033 from 01.92 and 140.134 from 01.92 | |
New pads | 19.3 |
Permissible wear | |
Substrate not included | 2 |
Subject to substrate (for maintenance) | 13 |
Operation of the wear indicator | 2.5 |
Models 140.028/032/033/134/135 and 140.042/043/050/051/056/057/063/070/076 | |
New pads | 15.5 |
Permissible wear | |
Substrate not included | 2 |
Subject to substrate (for maintenance) | 11 |
Operation of the wear indicator | 2.5 |
Dimensional characteristics of the front brake discs, mm | |
Minimum allowable thickness | 25.4 (since 91 27.4) |
Models 140.134, 140.028/042/043/050/051/056/ 076/135 and 140.032/033 from 01.92 | |
new disc thickness | 30 |
Permissible disc wear | 27.4 |
Permissible wear for maintenance | 28 |
Models 140.032/033 from 01.92 | |
new disc thickness | 28 |
Permissible disc wear | 25.4 |
Permissible wear for maintenance | 26 |
Dimensional characteristics of brake components | |
Diameter of the new caliper body, mm | |
Caliper 2-piston design (models 140.03/1 to 12.91 (ATE 57) | 56.99-57.04 |
Caliper 4-piston design | |
Models 140.02/04/05/06/07 (Girling/Lucas diameter 40/44) | 39.98 - 40.03 |
Models 140.03/1 from 01.92 (Girling/Lucas diameter 40/44) | 39.98 - 40.03 |
Width, mm | |
Caliper 2-piston design (models 140.03/1 to 12.91 (ATE 57) | 90 + 0.2 |
Caliper 4-piston design | |
Models 140.02/04/05/06/07 (Girling/Lucas diameter 40/44) | 43.98 - 44.03 |
Models 140.03/1 from 01.92 (Girling/Lucas diameter 40/44) | 43.98 - 44.03 |
Brake disc diameter, mm | |
Caliper 2-piston design (models 140.03/1 to 12.91 (ATE 57) | 310 |
Caliper 4-piston design | |
Models 140.02/04/05/06/07 (Girling/Lucas diameter 40/44) | 100 + 0.2 |
Models 140.03/1 from 01.92 (Girling/Lucas diameter 40/44) | 100 + 0.2 |
Brake disc thickness, mm | |
Caliper 2-piston design (models 140.03/1 to 12.91 (ATE 57) | 28 |
Rear wheel brakes
Minimum allowable diameter of brake drums, mm | 160.2 |
Dimensional characteristics of the rear brake discs, mm
Minimum allowable thickness | |
According to 90 issue. | 8.3 |
Since 91 issue. | |
whole | 9.8 |
Ventilated | 19.4 |
Models 140.028/032/033, 140.134/135 | |
new disc thickness | 12 |
Permissible disc wear | 9.8 |
Permissible wear for maintenance | 10.5 |
Models 140.042/043/050/051/056, 140.057/063/070/076 | |
new disc thickness | 22 |
Permissible disc wear | 19.4 |
Permissible wear for maintenance | 20 |
Master brake cylinder
GTZ pusher piston diameter, mm | 25.4 |
GTZ floating piston diameter, mm | 19.05 |
Movement of the pushing piston in the GTZ, mm | 17 |
Movement of the floating piston in the GTZ, mm | 15 |
Hydraulic drive
The dependence of the pressure in the hydraulic drive on the force of pressing the foot brake pedal (at a pressure in the inlet pipeline of 0.75-0.8 bar), bar | |
100 N | |
Models 140.02/03/1 (ATE T52 4A 225 210 or Lucas LSC 115) | 35-45 |
Models 140.04/05/06/07 (ATE T52/ 4A 255 225) | 35-47 |
150 N | |
Models 140.02/03/1 (ATE T52 4A 225 210 or Lucas LSC 115) | 53- 63 |
Models 140.04/05/06/07 (ATE T52/ 4A 255 225) 57-69 | |
200 N | |
Models 140.02/03/1 (ATE T52 4A 225 210 or Lucas LSC 115) | 71 -81 |
Models 140.04/05/06/07 (ATE T52/ 4A 255 225) | 78 -92 |
250 N | |
Models 140.02/03/1 (ATE T52 4A 225 210 or Lucas LSC 115) | 87-98 |
Models 140.04/05/06/07 (ATE T52/ 4A 255 225) | 95- 105 |
Vacuum brake booster
Vacuum booster diameter, mm | |
Models 140.02/03/1 (ATE T52/4A 225 210 or Lucas LSC 115) | 203/228.6 |
Models 140.04/05/06/07 (ATE T52/4A 255 225) | 228.6/254 |
Gain | |
Models 140.02/03/1 (ATE T52/4A 225 210 or Lucas LSC 115) | 5.6 |
Models 140.04/05/06/07 (ATE T52/4A 255 225) | 6.85 |
Tightening force of threaded connections, Nm
Fastener tightening torques are also given in the text of the Chapter and in some illustrations *.
* The tightening torques shown in bold type must be strictly adhered to; Efforts not in bold type are indicative only.
rear hub | 320 |
Front caliper to holder | 35 |
Rear support to holder (TDI) | 115 |
Caliper holder for knuckle | |
Front wheels | 115 |
rear wheels | |
Until 07.93 | 115 |
After 08.93 | 50 |
Vacuum tube to vacuum booster | 30 |
Nut of fastening of the vacuum amplifier to bracket | 20 |
Brake hose to brake pipe | 14 |
Brake hose to brake caliper | 18 |
Frequency sensor mounting bolt front wheel rotation | 22 |
Frequency sensor mounting bolt rear wheel rotation | 8 |
Tie rod nuts | |
S280, S320, S300 TDI | 50 |
S420, S500, S600 | 55 |
wheel bolts | |
S280, S320, S420, S500, S600 | 150 |
S300 TDI | 110 |