Instruction Manual

Deﬁ nitions

 Transporting people in and around city or suburban areas

 Operation on well-maintained highways and residential streets made of asphalt or concrete

 Very frequent stops (nine per mile) are considered typical

Typical Vehicle Types

Airport Shuttle City Bus

Shuttle Bus Trolley

Vehicle Conﬁ gurations

4 x 2 straight coach

General Requirements

• Anti-compounding air system

• Cam same operation for all steerable axle brakes

• Air chamber bracket assemblies with gusset for all transit 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 brake models the camshaft input torque is limited to 2545 N•m [22,500 in-lbs].

• Extra heavy duty (severe service) Brake drum on steer, drive and auxiliary axles.

General Recommendations

• Cam same for all brake assemblies

• 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 micrometer [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

Transit Coach