Weight Stroke TÜV-Inspection approx. [kg] II )4) BZ M16x Port threads:

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1 Commercial Vehicle Systems Product DATA Spring Brakes (S-cam), diaphragm/piston Doc. No. Y1137 (EN - Rev. 5) September 216 PD Function This range of Spring Brakes is used on axles fitted with drum brakes to provide the service and parking brake functions. The internal wind-off mechanism allows the parking brake force to be removed if air pressure is no longer present. See PD-413-, Document No. Y for the full range of Spring Brakes for trailers. Technical Features Maximum operating pressure: Port 11; 1 bar Port 12; 8.5 bar Full hold-off pressure: 5.5 bar Operating temperature range: -4 C to +8 C Push rod stroke: See table Port threads: See table Release device: Mechanical Weight: See table Standard Symbol as DIN ISO BX 7... Range Overview Part No. Type No. Size Weight Stroke TÜV-Inspection Service Brake Parking Brake Port Threads approx. Report [Type] [Type] [kg] II )4) BZ M16x II ) BZ M16x II ) BZ M16x II )5) BX M22x1.5 Voss 5) 57 Service Brake 8.1 II )5) BX M22x1.5 Voss 5) FBKV 9.4 II1792 2) BZ HF 6) M16x Spring Brake FBKV II )4) BX M16x II )5) BX M22x1.5 Voss 5) II )4)7) K4199 1)3)4) BZ M16x ) without rubber boot 2) with rubber boot and welded yoke 3) will carry the suffix N denoting that it is supplied without packaging 4) with installation kit K12957K5 5) with installation kit II3799 6) HF = high force 7) K4199 replaces II32128 Other versions are available. Installation kit K12957K5 contains: Installation kit II3799 contains: Yoke, yoke pin, split pin, lock nut for yoke, hexagon self-locking mounting nut (2x) Port adapter (M22x1.5 to M16x1.5) (2x), yoke, yoke pin, split pin, lock nut for yoke, hexagon self-locking mounting nut (2x) Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax:

2 PD Product Data Doc. No. Y1137 (EN - Rev. 5) September 216 Dimensions D E A F α M16x B C M16x1.5 R G Part No. Type No. Performance Charts A B C D [sq in] E F G R II31997 BZ II33453 BZ II33454 BZ II37274 BX II37276 BX II1792 BZ II32718 BX II37277 BX II32128 K4199 BZ α [ ] [dm 3 ] Service Brake BZ9317, BZ9318, BZ9319 BX94 Return spring force at 2mm stroke: F= 34N Return spring force at 2mm stroke: F= 34N 13,9,7,5,3, min [dm 3 ] 15 14,9,7,5,3, min Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax:

3 Commercial Vehicle Systems Doc. No. Y1137 (EN - Rev. 5) September 216 PD Performance Charts (continued) [dm 3 ] [dm 3 ] BX942 Return spring force at 2mm stroke: F= 34N,9,7,5,3, min BX9519 Return spring force at 2mm stroke: F= 34N 15 14,9,7,5,3,1 6,5bar min Service Brake [dm 3 ] [dm 3 ] BZ952, BX954 Return spring force at 2mm stroke: BZ952 F= 34N BX954 F= 18N 15 14,9,7 6,5bar 13,5,3,1 BZ952 BX min BZ9646 Return spring force at 2mm stroke: F= 3N 2, K4199 II min Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax:

4 PD Product Data Doc. No. Y1137 (EN - Rev. 5) September 216 Performance Charts (continued) Parking Brake BZ9317, BZ9318, BZ9319, BX94, BX9519 BX942, BX954, BZ9646 [dm 3 ] Required hold-off pressure: 5.1 ±,3 bar min Parking brake output [N] [dm 3 ] Required hold-off pressure: 5,1 ±,3 bar min Parking brake output [N] [dm 3 ] BZ952 Required hold-off pressure: 5,5 ±,3 bar min Parking brake output [N] Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax:

5 Commercial Vehicle Systems Doc. No. Y1137 (EN - Rev. 5) September 216 PD Installation and Mounting instructions For reliable and safe mounting of spring brakes, 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,1 mm), not final coated Direct contact of the full surface of the spring brake mounting face must be made with the mounting bracket. No spacing washers, adapter plates or other elements are allowed. Ensure adequate clearance is provided behind the actuator to allow the wind-off bolt to be unscrewed. 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 9 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 actuator to meet the slack adjuster. Maximum pivoting angle of push rod in all directions = 3 For mounting studs, nuts and plain washers must be used. General requirements of mechanical engineering concerning stepwise tightening must be followed Tightening torque 18+2 Nm For further information please contact Knorr-Bremse, the axle or trailer manufacturer. Winding-off the Power Spring In case of failure in the air system, to release the actuator s spring force: Turn nut (A/F 24 mm) at the rear of the actuator in an anti-clockwise direction (max. 35 Nm). Attention: Use only the correct sized ring or open-ended spanner! Attention: The parking brake portion of the Spring Brake contains a very high spring load and it is strongly recommended that you do not attempt any disassembly of this portion. This should also be taken into consideration when disposing of spring brakes of any type. Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax:

6 PD Product Data Doc. No. Y1137 (EN - Rev. 5) September 216 Revision Details Rev. 4 September 211 New layout for revised Trailer Catalogue. Rev. 5 March 214 Page 1 - stroke of II37277 corrected and note added concerning II Rev. 5 September 216 Page 1 - correction to kit for K4199. Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax: