SEAL 5P5322 - Caterpillar

The function of the air compressor is to provide and maintain air under pressure to operate devices in the air brake and/or auxiliary air systems.The Tu-Flo 550 compressor is a two cylinder single stage, reciprocating compressor with a rated displacement of 13.2 cubic feet per minute at 1250 rpm.The compressor assembly consists of two major subassemblies, the cylinder head and the crankcase. The cylinder head is an iron casting which houses the inlet, discharge, and unloader valving. (See Fig 1) The cylinder head contains the air inlet port and is designed with both top and side air discharge ports. Three water coolant ports provide a choice of coolant line connections. Governor mounting surfaces are provided at both the front and the rear of the cylinder head. The head is mounted on the crankcase and is secured by six cap screws. The Tu-Flo 550 compressor is designed such that the cylinder head can be installed in one of two positions which are 180 degrees apart. The crankcase houses the cylinder bores, pistons, crankshaft and main bearings, and provides the flange or base mounting surface.
Fig 1 Cylinder HeadVarious mounting and drive configurations, as shown in Fig 2, are supplied as required by the vehicle engine designs.
Fig 2 Flange ConfigurationsA nameplate identifying the compressor piece number and serial number is attached to the side of the crankcase. (Reference Fig 3)
Fig 3 Nameplate