Overview — ALT, D/R 22SI 12V NEG 100A 3675222RX
3675222RX is the Delco Remy 22SI alternator used on CUMMINS engines to charge the 12V electrical system at 100A, with negative ground and the original mounting configuration. We can supply this alternator as well as related CUMMINS charging components, in stock or available on order — welcome to enquire by part number.
Parts Characteristics
The alternator is built to the original 22SI electrical specification, with the 12V negative-ground output, 100A rating and the original pulley and mounting geometry. The housing, rectifier and regulator match the original design so the charging curve suits the CUMMINS electrical system. The terminal layout follows the original wiring, and the mounting bracket pattern accepts the standard J180 style installation. As an OEM-spec unit, it bolts in place and charges to specification.
Applicable Models & Applications
This 22SI alternator is used on CUMMINS engines and machines with a 12V electrical system requiring 100A charging, including industrial engines, generator sets and construction equipment. Confirm the mounting type, pulley size, terminal layout and output rating against the alternator removed from your engine before ordering.
Maintenance & Replacement
Check the charging system at service intervals by measuring system voltage with the engine running, and inspect the alternator for worn bearings, a slipping belt and damaged terminals. A failing alternator shows up as low battery voltage, dim lights and warning lamps. When replacing, disconnect the battery, fit the new alternator, and torque the mounting bolts to specification. Tension the belt correctly and verify charging voltage after start-up.
Price Reference (USD)
The reference price for this ALT, D/R 22SI (3675222RX) is approximately USD 250 – 900 per unit depending on grade, quantity and shipping destination. This is a planning estimate only — confirm current pricing and availability with our sales team before ordering.
Value & Service
An under-rated alternator will not keep a fleet battery charged, so we verify 3675222RX against the original 22SI rating and mounting specification before dispatch. We supply the alternator with the matching pulley and hardware, and it can ship together with the belt and tensioner kit in one tracked order. Our team will confirm the correct unit for your electrical load before you buy.
Racer Machinery is a dedicated construction-machinery parts supplier — send us your part number and engine model, and we will confirm fitment, price and lead time for this alternator and related CUMMINS charging components.
