Belt Pulley

Alternator Pulley 3926858 3965146 | Overhaul Grade for Cummins 6C8.3 ISB6.7

Alternator Pulley 3926858 3965146 for Cummins ISB6.7, ISC8.3, QSB6.7 and related platforms — high-strength forged steel, precision-machined groove profile. Sits at the front-end accessory drive; groove micro-pitting leads to belt slippage and alternator bearing stress — schedule replacement alongside serpentine belt and tensioner to avoid reactive downtime Fits 6C8.3, B6.7, L9, N14 and legacy Cummins series where brand support is thinning Replacement interval guidance and cross-reference sheet included with shipment

Alternator Pulley 3926858 3965146 for Cummins – Fleet Supply

ISO 9001 production with 3-12 month warranty Sustained supply for legacy Cummins platforms still in active fleets Replacement interval guidance included with shipment for fleet planning

Alternator Pulley 3926858 for Cummins ISB6.7 ISC8.3 QSB6.7 – Direct-fit Replacement

Stop unexpected alternator belt slippage and engine downtime on your Cummins ISB6.7, ISC8.3, or QSB6.7 — this 3926858 alternator pulley delivers OEM-equivalent fit and torque transfer right out of the box. Built to match the exact 10° taper angle and 45 mm bore diameter required for Cummins CM2250/CM2350-series crankshaft mounting, it eliminates the guesswork and costly misalignment common with generic pulleys. Direct-fit replacement for part numbers 3926858, 3965146, and 3965147 — no machining or adapters needed Verified compatible with all major Cummins B-, IS-, QSB-, and QSL-series engines listed (including CM2350 B136C, CM2250 EC, and CM2350 B130 variants) Pre-tested for concentricity and surface hardness (HRC 48–52) to prevent premature bearing wear or belt chirping Ships from our Guangzhou warehouse in 2–5 working days — MOQ just 1 piece, ideal for urgent field repairs