SERVICE BULLETIN
Contents
1. 9 16 supply line 5 Socket Wrench Set 4 Remove the Muffler Item 13 and Pipe Plug Adapter Items 21 9 16 deep well socket amp 22 Retain for reuse 5 Loosen the Spanner Nut on the threaded tube portion of the actuator 6 Turn the Actuator counterclockwise to remove it from the brake arm Pull the Piston Rod Item 10 out of the threaded tube remove the Spanner Nut and retain for reuse N Old 3 Port Actuator Install Pipe Plug Put Air Pressure in Center Port to Release Brake Piston Rod py a ce IH i H il Plastic Breather Cap amp Filter Open For Access vn to Tap Bolt Spanner Nut Outboard Air Holes Ports Install MufflerPlug Marked Service on Casting Re Assembly 1 2 3 4 Insert the Push Rod into the new Actuator tube and thread the Spanner Nut onto the tube Check if the tap bolt on the new Actuator is loose Screw the new Actuator in the Brake Arm turn the Actuator clockwise until the end of the tube is approximately 1 16 from the inside edge of the Arm Attach the air line to the Actuator s center port labeled Spring Brake NOTE The Actuator may be rotated 360 for air line orientation Loosen the ring clamp bolt and rotate to the desired position Tighten the ring clamp to 15 20 ft lbs New 2 Port Actuator Air Engaged Brake Disassembly 1 2 3 4 5 OP OP EIA GP OEP TE at Yay Two 2 Side Ports Marked Servic L2. nexen SERVICE BULLETIN X gt Return notification to repair BD Caliper Brakes supplied by Nexen Group Inc formerly Horton Industrial Products Inc Product Spring Engaged Brake e BD Caliper Brakes Spring Engaged e BD Caliper Brakes Air Engaged Danger The Actuator Assembly Item 11 is spring loaded under extreme Problem Defective Weld pressure Do not remove the clamp The threaded tube actuator welds are defective and could cause collar to disassemble the upper portion the actuator to become separated from the threaded tube If this from the lower portion Please follow the occurs the actuator could be projected from the brake under full instructions listed below actuator force causing serious harm or injury Disassembly What must be done Manually release the Spring Actuator prior to disassembly Replace the actuator portion of the brake with the new 2 port 1 Apply a minimum of 85 psi hold off air pressure to remove the actuator supplied for this purpose spring force on the brake arms shoes and tap bolt Required items and tools 2 Remove the plastic breather cap located at the top of the 1 hieven Near Nan Actuator Item 11 Using a 9 16 socket wrench turn the tap L 20063 bolt counterclockwise until the tap bolt is even with the top of jA new actuator the actuator and loose Approximately 40 turns 3 Spanner Wrench 3 Shut off the air supply to the brake and disconnect the air 4 Open End Wrench
3. oosen the Spanner Nut on the threaded tube portion of the Actuator Shut off the air supply Disconnect the air supply line Turn the Actuator counterclockwise to remove it from the brake arm Pull the Push Rod out of the threaded tube remove the Spanner Nut and retain for reuse Re Assembly 1 2 Insert the Push Rod into the new Actuator and thread the Span ner Nut onto the tube Screw the new Actuator into the brake Arm turn the Actuator clockwise until the end of the tube is approximately 1 16 from the inside edge of the arm Attach the air supply line to the actuator port 5 Install a Muffler Plug Item 13 into one Service port and the Pipe Plug Adapter Items 21 amp 22 into the other Service port 6 Apply a minimum of 85 psi hold off pressure to the Actuator 7 Using a 9 16 socket wrench turn the Tap Bolt clockwise and tighten to 10 15 ft lb torque 8 Perform the Friction Facing Clearance Adjustment procedure found in User Manual L 20063 9 Tighten the Spanner Nut Center Port Marked Spring Brake Manual Release Tap Bolt Backed off amp Loose NOTE The actuator may be rotated 360 for air line orientation Loosen the ring clamp bolt and rotate actuator to desired position Tighten ring clamp bolt to 15 20 ft lbs 4 Perform the Friction Facing Clearance Adjustment procedure found in User Manual L 20063 5 Tighten the Spanner Nut ne gt lt en Nexen Gro
4. up Inc 800 843 7445 560 Oak Grove Parkway Fax 651 286 1099 Vadnais Heights MN 55127 www nexengroup com ISO 9001 Certified L 21076 E 1114
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