ARO 637004-B Service Kit

The ARO 637004-B Service Kit (KIT ASM) is an official maintenance package intended for service and rebuild work on ARO piston pump assemblies. Listed in Ingersoll Rand's catalog as 637004-B under the Misc Piston Pumps Parts Kits Accessories category, it is a multi-part kit rather than a single replacement component, reflecting its role in complete service tasks. Technicians use service kits like 637004-B to replace worn components, reseal where applicable, and restore expected pump performance within the alignment and tolerances defined by ARO’s pump design. The presence of 637004-B in official parts listings confirms its function as a genuine maintenance option within the ARO fluid-handling product family, positioned among other piston-pump kit options for various model families. As with other ARO service kits, the 637004-B designation helps buyers identify the correct kit for the intended pump family and model range, supporting accurate ordering and consistent service outcomes.