Instruction Manual

Deﬁ nitions

 Pickup and delivery service within cities and/or suburban areas

 Operation on road surfaces of concrete, asphalt and maintained gravel

 Three (3) miles between starts/stops (typical)

 100% load going/40% load return (typical)

Typical Vehicle Types

Auto Transport Truck Moving Van Pickup and Delivery Tanker Truck

Beverage Truck Municipal Truck Refrigerated Truck

Flatbed Truck Newspaper Delivery Stake Truck

General Requirements

• 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 type 30/36 or 36/36 Spring brake chambers.

c. Super Single Tire (Wide Base Tires)

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, see page 45, when the application includes any of the following components:

a. Super single tire

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

c. High-articulation mechanical suspensions

d. Two-speed axle or Planetary double reduction axles

• 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

• 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

• Due to legal maximum highway GAWR (17,000-20,000 lb.) per code of federal regulations, 23 CFR - chapter 1, part 658

and brake balance to trailers, brakes should be rated to 20,000 when used on structurally rated 23,000 GAWR drive axles.

City Delivery