SPECIFICATIONS
| Item | Specification | Fill Capacity |
|---|---|---|
| High Performance DOT 3 Motor Vehicle Brake Fluid PM-1-C (US); CPM-1-C (Canada) | WSS-M6C62-A or WSS-M6C65-A1 |
MATERIAL SPECIFICATIONS
| Item | Specification |
|---|---|
| Front Brakes - 2 Piston Calipers | |
| Front brake disc minimum thickness | 28.4 mm (1.118 in) |
| Brake pad minimum thickness | 3.0 mm (0.118 in) |
| Brake pad maximum taper wear (in any direction) | 3.0 mm (0.118 in) |
| Front Brakes- 4 Piston calipers | |
| Front brake disc minimum thickness | 30.0 mm (1.181 in) |
| Front brake pad minimum thickness | 1.8 mm (0.071 in) |
| Front Brakes- 6 Piston calipers | |
| Front brake disc minimum thickness | 29.0 mm (1.141 in) |
| Front brake pad minimum thickness | 7.65 mm (0.301 in) |
| Rear Brakes - All vehicles | |
| Rear brake disc minimum thickness | 17.4 mm (0.685 in) |
| Rear brake pad minimum thickness | 3.0 mm (0.118 in) |
| Brake pad maximum taper wear (in any direction) | 3.0 mm (0.118 in) |
GENERAL SPECIFICATIONS
| Description | Nm |
|---|---|
| Front brake caliper bleeder screw (2 piston caliper) | 10 |
| Front brake caliper bleeder screw (4 and 6 piston calipers) | 18 |
| Master cylinder brake tube fittings | 25 |
| Rear brake caliper bleeder screw (all vehicles) | 10 |
TORQUE SPECIFICATIONS
The brake system consists of the following components
- Front and rear disc brakes
- Cable/caliper actuated parking brake
- Brake master cylinder and fluid reservoir
- Vacuum-assisted power brake booster
- Four-wheel ABS
- Red brake light indicator
The brake pedal is connected to the power brake booster, which is connected to the brake master cylinder. When the brake pedal is pressed, brake fluid is pushed through the double-walled steel tubes and flexible hoses to the front and rear disc brake calipers. The brake fluid enters the disc brake calipers, forcing the caliper pistons and brake pads outward against the brake disc friction surface, slowing or stopping rotation. When the brake pedal is released, brake fluid pressure is relieved, returning the front and rear disc brake caliper pistons and brake pads to the unapplied position.
For additional information on the following
- Front disc brakes, refer to FRONT DISC BRAKE .
- Rear disc brakes, refer to REAR DISC BRAKE .
- Parking brake actuation, refer to PARKING BRAKE AND ACTUATION .
- Hydraulic brake actuation, refer to HYDRAULIC BRAKE ACTUATION .
- Vacuum-assisted power brake booster, refer to POWER BRAKE ACTUATION .
- ABS, refer to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL .
Applying the brake pedal uses lever action to push a rod into the brake booster, which through the use of vacuum, boosts the force of the rod and then transmits this force to the primary piston in the master cylinder. This produces hydraulic pressure in the master cylinder. This pressure builds in the master cylinder and brake tubes as the brake pedal is applied further. The pressure between the primary and secondary piston forces the secondary piston to compress, building pressure in its circuit. The hydraulic pressure is transmitted by brake fluid through the brake tubes to the ABS Hydraulic Control Unit (HCU), which then distributes that pressure to the individual brake calipers. The brake calipers use hydraulic pressure to apply the pads. The application of the brake pads will cause the rotation of the wheels to slow or stop, depending on how much brake pressure is applied. The parking brakes carry out the same function except that they are mechanically actuated by a cable that connects only to the rear brakes.
See also:
• JACKING & LIFTING