Dimensional

Brake System Components Dimensional

Brake Disc, Front Wheel, Ventilated (Viggen Grooved):

Dimensions Viggen / Others

Outside diameter 308 mm (12.1 in) / 288 mm (11.3 in)
Thickness (new) 25 mm (0.98 in) / 25 mm (0.98 in)
Minimum permissible thickness 22 mm (0.87 in) / 22 mm (0.87 in)
Maximum refacing depth/side 1.0 mm (0.04 in) / 1.0 mm (0.04 in)
Minimum permissible
thickness after grinding 23.5 mm (0.92 in) / 23.5 mm (0.92 in)
Maximum runout (fitted) 0.08 mm (0.003 in) / 0.08 mm (0.003 in)
Maximum Variation in Thickness 0.015 mm (0.0006 in) / 0.015 mm (0.0006 in)

Brake Disc, Rear Wheel, Solid Type:

Dimensions Metric / SAE

Outside diameter 286 mm / (11.3 in)
Thickness (new) 10 mm / (0.39 in)
Minimum permissible thickness 8.0 mm / (0.32 in)
Maximum machining depth per side 0.8 mm / (0.032 in)
Minimum permissible thickness after grinding 8.5 mm / (0.33 in)
Maximum runout (fitted) 0.08 mm / (0.003 in)
Maximum variation in thickness 0.015 mm / (0.0006 in)

Brake Pads, Front Wheel:

Dimensions Metric / SAE

Friction material, minimum thickness at time of service 5.0 mm (0.2 in)
Friction material, new 14 mm (0.55 in)
Area of friction material/pad 56 cm2 (8.68 in2)

Brake Pads, Rear Wheel:

Dimensions Metric / SAE

Friction material, minimum thickness at time of service 5.0 mm (0.2 in)
Friction material, new 11 mm (0.43 in)
Area of friction material/pad 24 cm2 (3.72 in2)

Tightening Torque, Other

Joint Value Metric / SAE

Retaining bolts, front brake caliper 110 Nm (81 Lb ft)
- Remarks: Seal the threads with Loctite 242, 74 96 268
Retaining bolts, rear brake caliper 80 Nm (59 Lb ft)
- Remarks: Seal the threads with Loctite 242, 74 96 268
Locking screw, rear brake disc 10 Nm (7.4 Lb ft)
Locking screw, front brake disc 4 Nm (3 Lb ft)
Guide pins, front brake caliper 25 Nm (18 Lb ft)

Brake Fluid Reservoir:

Capacity 0.24 L
Total brake system capacity 0.58 L
- Viggen 1.08 L
Brake fluid type DOT 4

Master cylinder, others:

Type Aluminium tandem cylinder
Diameter 23.8 mm (0.93 in)

Brake servo unit, others:

Type Vacuum assisted
Diameter 229 mm 9 in
Force amplification 4:1
- at 300 Nm (66 Lb ft) pedal pressure

Brake Caliper, Front Wheel:

Manufacturer Ate
Type designation FN3-57
Type Swinging caliper
Piston diameter 57 mm (2.22 in)

Brake Caliper, Rear Wheels:

Manufacturer Ate
Type Fixed caliper
Piston diameter 35 mm (1.38 in)

Vacuum Pump, Mechanical:

Manufacturer Magneti Marelli
Revolutions per minute Engine rpm x 0.5
Max. vacuum 0.95 bar

Vacuum pump electric:

Manufacturer Pierburg PA66 GF3O
Max. rpm 4400 rpm
Max. vacuum 0.8 bar
Resistance 1.45 Ohms
Working voltage 12 V
Current consumption 2.3 A

Footbrake system Technical data - Tightening torques

Joint Value Nm / Lb ft

Brake caliper retaining bolts, front wheel 110 Nm / 81 (Lb ft)
- Seal the thread with Loctite 242, no.74 96 268
Brake caliper retaining bolts, rear wheel 80 Nm / (59 Lb ft)
- Seal the thread with Loctite 242, no.74 96 268
Brake caliper guide pins, front wheel 28 Nm / (20 Lb ft)
Wheel hub, rear wheel 50 Nm / (37 Lb ft)
- 50.0 / (36.7)
Brake disc locking screw, front wheel 4 Nm / (3 Lb ft)
Brake disc locking screw, rear wheel 10 Nm / (7 Lb ft)
Brake line nipple, rear wheel 14 Nm / (10 Lb ft)
Brake hose, front wheel 40 Nm / (29 Lb ft)
Wheel studs 110 Nm / (81 Lb ft)

Brake System:

Type Two separate diagonal brake circuits
Hydraulic brake system Acts hydraulically on the rear wheels
Handbrake system Acts hydraulically on the rear wheels

Brake Drum, Parking Brake Rear Wheel:

Manufacturer Budurus alt. Volvo
Maximum allowed rotational variation 0.08 mm (0.003 in)
Inside diameter 160 mm (6.30 in)
Maximum allowed inside diameter
- The brake drum and/or shoes are replaced when more than 10 threads are visible on the adjusting unit.

Brake Shoes, Handbrake:

Manufacturer Textar
Thickness of friction material (new) 3 mm (0.118 in)
Minimum allowed thickness
- The brake shoes and/or drum is replaced when more than 10 threads are visible on the adjusting unit.
Area of friction material/Pads 40 cm2 (6.2 in2)
Shoe radius 80 mm (3.15 in)
Marking TO 79