Part Number Update Bulletin No: PNU-195 Effective Date: September 2, 2014 Cancels: NA Page: 1 of 1 Subject: New ESS Piston / Unloader Valve Cross Reference Bendix released two new service unloader assembly kits to replace existing part numbers as detailed below. One is available from Bendix and the other from Caterpillar. Please make note of these additions/changes as necessary. If you have any questions, please contact Bendix Commercial Vehicle Systems at www.bendix.com or 1-800-AIR-BRAKE (1-800-247-2725), option 2. Kit Part No. K109119 5014473 Engines Type DDC®, Non-bushed Navistar® 355-6328* CAT® Replaces Bendix Part No. Quantity Needed 5008557 1 5018768 1 K109119 (2) Bushed K046477 1 K049446 2 Each unloader kit services 1 unloader assembly. One kit is needed for Bendix® BA-921® compressors and two kits are needed for Bendix® BA-922® compressors. * Available through Caterpillar dealers only. K109119 Unloader Assembly Kit (non-bushed) 335-6328* Unloader Assembly Kit (bushed) Contents of Unloader Kit Part No. K109119 Contents of Unloader Kit Part No. 335-6328* Description Qty. Description Qty. Gasket 1 Gasket 1 Balance Piston 1 Balance Piston 1 Spring 1 Spring 1 O-ring 1 O-ring 1 O-ring 1 Unloader Piston 1 O-ring 1 Grease (not shown) 1 Unloader Piston 1 Cap Screw 2 Grease (not shown) 1 Log-on and Learn from the Best On-line training that's available when you are Visit www.brake-school.com. ©2014 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group • 09/14 • All Rights Reserved. 24/7/365.