Instruction Manual

Deﬁ nitions

 Vehicles generally used for non-commercial transportation and as traveling domiciles for families

 100% loaded full time

 May pull small passenger car, SUV or pick-up truck

 Typical vehicle routes exceed 30 miles between start and stop

 Annual mileage will be under 30,000

 Typical operation is on paved roads and short distances within campgrounds and parks

Typical Vehicle Types

Recreational Vehicles

Vehicle Conﬁ gurations

Straight coach type vehicles with towing ability:

4 x 2 straight coach

6 x 2 (with non-liftable tag or pusher axles)

General Requirements

• Anti-compounding air system

• Cam same operation for all steerable axle brakes

• 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.

• Air chamber bracket with gusset for applications, see page 45, when the application includes any of the following

components:

a. Super single tires

b. Type 30/36 or 36/36 Spring brake chambers.

• BSFB Application Engineering approval for:

a. Vehicle towing unbraked trailer vehicle.

b. 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].

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 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

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