Instruction Manual

Deﬁ nitions

 Transporting people and sometimes light freight between cities and/or suburban areas

 Operation on road surfaces of concrete, asphalt, maintained gravel, crushed rock, or hard packed dirt

 High mileage operation

 Typical vehicle routes exceed 30 miles between start and stop

 No towed load allowed

Typical Vehicle Types

Tour Coach

Cross Country Coach

Vehicle Conﬁ guration

6 x 2 straight coach with non-liftable tag or pusher axles

General Requirements

• Anti-compounding air system

• Cam same operation for all brakes

• Air chamber bracket with gusset for all intercity coach applications, see page 45

• Air chamber bracket assembly gusset and additional camshaft bracket support see page 45, attached to the axle housing

when the:

a. Brake centerline to air chamber centerline distance (BCCC dimension) is greater than 343 mm [13.5"]

b. Application use a type 30/36 or 36/36 Spring brake chambers.

c. Camshaft brackets with BCCC dimension of less than 8.12” does not require a gusset or additional support.

d. Super Single Tire (Wide Base)

Note: The above support can be supplied by BSFB or the vehicle manufacturer but

must be approved by BSFB Application Engineering Department.

• Applications for use in countries other than the USA and Canada must be reviewed by BSFB Application Engineering.

• Vehicle manufacturer is responsible for air system design, parking and stopping distance performance.

• For all S-cam brake models the camshaft input torque is limited to 2545 N•m [22,500 in-lbs].

• Applications on vehicles with ﬁ xed or liftable auxiliary axles (tag or pusher) must be approved on an individual basis by the

BSFB Application Engineering Department, as auxiliary axles may impact the braking performance of the vehicle.

General Recommendations

• Dust shields for all applications

• Use Auxiliary retarders per TMC RP636

• Brake drum / Rotor material speciﬁ cation per SAE J431. Drum / rotor surface ﬁ nish 4.57 micrometers [180 max microinch]

and .38 mm [.015"] runout, when mounted on a hub rotated on bearings. See notes section for Minimum Drum Weight

requirements

• Brake air system balance per TMC RP632

Intercity Coach