Weight approx. [kg] II39908FA BZ Part No. Type No. Type Push Rod Seal TÜV Inspection Report

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1 Commercial Vehicle Systems Product DATA PD Function This range of Brake Chambers is used on axles fitted with drum brakes. The single diaphragm cylinder provides the service brake function. In addition Brake Chamber BX321 has no central air port, so its air pressure plate is flat and it is often used in interlock systems on trailers. See PD , Document No. Y for the full range of Brake Chambers for trailers. Technical Features Maximum Operating Pressure: 8.5 bar Operating Temperature Range: -40 C to +80 C Push rod stroke: 75 mm Air ports: centre & side Surface treatment: Powder coated Weight: See table Standard Symbol as DIN ISO 9 BZ 3... Range Overview Part No. Type No. Type Push Rod Seal TÜV Inspection Report Weight approx. [kg] II39908FA BZ II33198A BZ II33479A BX Sealing Washer II33441A BX II33445A BX FBKV K11527A BX II40324FA BZ II33458A BX Rubber Boot II33442A BX II33444A BX4 4.3 Other versions are available. 1

2 PD Product Data Push Rod Seal Rubber Boot Sealing Washer Installation Kits/Yokes for Part No. Yoke type Description SEB01321 Round hole Installation Kit with Yoke to suit Types 12 and 1 SEB01322 Slotted hole SEB01314 Round hole Forged Yoke for Types 20, 24 and SEB01315 Round hole Installation Kit with Yoke to suit Types 20, 24 and SEB0131 Slotted hole ø ø18 ø14 h11 ø14 h Legend: 1 Yoke, round hole (SEB01315, SEB01321) 2 Yoke, slotted hole (SEB0131, SEB01322) 3 Bolt 4 Split pin 5 Plain nut Self-locking nut M12 1) 7 Self-locking nut M1 8 Screw plug 9 Sealing ring 10 Washer 135 1) for Typ 12 and 1 2

3 Commercial Vehicle Systems PD Dimensions 45 E K C G * H 3 A F B D ø J Part No. Type No. Type [sq in] A B C D E F G H J K II39908FA II40324FA II33198A II33458A II33479A II33441A II33442A II33444A II33445A K11527A BZ321 BZ323 BZ3370 BX341 BX3417 BX3534 BX3535 BX4 BX5 BX M12x1.75 M12x1.75 M12x * not for K11527A-BX321 3

4 PD Product Data Mounting Position Design: I Type 12"-" Type with single piece clamp ring Design: II Type " Type with two piece clamp ring Part No. Type No. Type [sq in] Air Port Angle α Angle β Clamp Ring Design α β α = air port angle β = clamp ring angle α β II39908FA BZ I II40324FA BZ I II33198A BZ I II33458A BX I II33479A BX I II33441A BX I II33442A BX I II33444A BX4 II II33445A BX5 II K11527A BX321 I 4

5 Commercial Vehicle Systems PD Performance Charts Type 12 Type 24 Stroke Type 1 Stroke Type Stroke BX321 Type 20 Stroke Stroke The output forces correspond to the requirements of DIN 7400 Th A = Piston force, average S P = Effective piston stroke V = at 2/3 of stroke as seen in the TÜV report FBKV. Type Th A [KN] at S P at V [l]

6 PD Product Data Installation and Mounting instructions For reliable and safe mounting of brake chambers, please note the following points: Use suitable mounting bracket with adequate stability (material thickness). Hole dimensions according to DIN. Plain mounting face, only primed (maximum thickness 0.1mm), not finish painted. Direct contact of the full surface of the brake chamber mounting face must be made with the mounting bracket. No spacing washers, adapter plates or other elements are allowed. Check length of push rod, it may need to be shortened. The angle between push rod and slack adjuster and between push rod and mounting bracket should be approximately 90 deg. when the push rod is at its mid-stroke position. During installation, the slack adjuster should be rotated towards the yoke to insert the yoke pin. On no account should the push rod be pulled out from the brake chamber to meet the slack adjuster. Maximum pivoting angle of push rod in all directions = 3. For mounting studs, use only self-locking nuts without washers of any kind. General requirements of mechanical engineering concerning progressive tightening must be followed. Tightening torque Nm for M1 x 1.5 thread. Tightening torque Nm for M12 x 1.75 thread. For further information please contact the Knorr-Bremse, the axle or trailer manufacturer. Revision Details Rev. 004 September 2011 Revised for new Trailer Catalogue layout Rev. 005 K11527A-BX321 added.