Bendix 107645 is a TF-750 spares kit filed under air brake compressor piston rings, and our catalog lists it as Kit Piston 020. It is a genuine Bendix part for servicing the compressor that builds the truck’s air supply. When the rings or cylinder wall wear, oil slips by into the air stream leaving the compressor and ends up in the air dryer and the brake valves. A wet, oily discharge from the dryer purge, or dryers that keep failing early on the same truck, is a clue the compressor needs attention. Call us to confirm proper fit for your compressor.A factory handling fee of $20.00 per unit is added at checkout.FeaturesGenuine Bendix spares kit for the TF-750Filed under air brake compressor piston ringsCatalog name: Kit Piston 020Worn rings show up as oil reaching the air dryer and brake valves