Cummins

Fleet Products supplies HOLSET air compressors for CUMMINS engines, including QE296, QE338, SS296, SS338, and ST676 models. Built for dependable high-output air delivery, these compressors support demanding brake and auxiliary air systems in vocational and highway applications.

Model prefixes identify the compressor family: SS for Super Single, ST for Super Twin, and QT for Quiet Economy. Suffixes identify the CUMMINS engine platform: B for B-Series and C for C-Series. An additional E indicates an E-Type unloader configuration.

HD Series Description Engine Sequence Code
HD450 Small-bore crankcase with special piston B-Series High mount: 1-4-3-U
Low mount: 3-4-1-L
HD650 Small-bore crankcase C-Series High mount: 4-3-4-3 / 4-3-1-3
HD850 Large-bore crankcase N14 / L10 High mount: 4-1-3-3
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