Bendix-commercial-vehicle-systems BEPA (FORD) 15X4 CAM BRAKE 5/09 User Manual download pdf

Bendix

BEPA (Ford) 15" x 4" Cam Brake

SD-22-3250

FIGURE 1

GENERAL DESCRIPTION

The Bendix

BEPA (Ford) 15" x 4" cam brake is designed

for use on heavy duty highway vehicles. It is a mechanically

actuated, leading/trailing shoe brake with a ﬁ xed position

cam and anchor.

The brake consists of two fabricated steel shoe assemblies

anchored to a cast iron torque spider and actuated by a

single forged S-cam shaft. Two retaining springs secure

the shoe assemblies to the anchor pin. The twin webs of

each shoe assembly are keyed to the anchor pin on one

end and the cam roller on the other. A single shoe to shoe

return spring is used to maintain constant contact between

the shoe, cam roller and cam.

OPERATION

The Bendix

cam brake operates in the following manner

during a braking application. The force of the push rod of

the actuator is converted from a linear force to a rotary

torque. This is accomplished by use of the slack adjuster.

This torque is transferred to the cam shaft of the foundation

brake due to the spline of the cam shaft being connected to

the gear of the slack adjuster. On the opposite end of the

cam shaft is the S-cam which when rotated lifts the cam

rollers. This spreads the brake shoe ends apart equally and

pivots the shoes about the anchor pin so the brake lining

comes in contact with the rotating brake drum. The friction

created by the lining pressure against the drum generates

the torque necessary to provide a retarding force to slow

down the vehicle. The energy of the vehicle in motion is

converted to heat at the surface of the drum and lining.

This heat raises the temperature of the drum. The heat is

stored in the drum, and ﬁ nally dissipated to the air.

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Summary of Contents

Page 1 - SD-22-3250

1Bendix® BEPA (Ford) 15" x 4" Cam BrakeSD-22-3250FIGURE 1GENERAL DESCRIPTIONThe Bendix® BEPA (Ford) 15" x 4" cam brake is designed

Page 2

2FIGURE 2 - BENDIX® BEPA (FORD) 15" X 4" CAM BRAKE16 Key No. Description Qty. 1 Snap ring 1 2 Spacer washers # +reqd. 3 Yoke pin

Page 3 - INJURY OR DEATH:

3PREVENTIVE MAINTENANCEImportant: Review the warranty policy before performing any intrusive maintenance procedures. An extended warranty may be voide

Page 4 - FIGURE 5 - REMOVING SHOES

4FIGURE 5 - REMOVING SHOESFIGURE 4 - REMOVING SHOE RETURN SPRINGFIGURE 7 - REMOVING ACTUATOR BRACKETFIGURE 6 - REMOVING SLACK ADJUSTERDISASSEMBLY (See

Page 5

57. Remove snap ring and washer from splined end of cam shaft. Remove slack adjuster from cam shaft. (A puller may be required.) Remove spacers and t

Page 6 - ASSEMBLY (SEE FIGURE 2)

67. BRAKE DRUMSA. Inspect drums for cracks, heat checking, glazing, grooving, severe out-of-round condition or bell mouthing (must not exceed .025 T.

Page 7

77. Install the thick cam shaft ﬂ at washer, the slack adjuster, spacers, washer, and a new snap ring in that sequence onto the splined end of the ca

Page 8

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Bendix-commercial-vehicle-systems BEPA (FORD) 15X4 CAM BRAKE 5/09 User Manual

Browse online or download User Manual for Equipment Bendix-commercial-vehicle-systems BEPA (FORD) 15X4 CAM BRAKE 5/09. Bendix Commercial Vehicle Systems BEPA (FORD) 15X4 CAM BRAKE 5/09 User Manual

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