Belt Pulley
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Belt Pulley
3 items
Belt Drive Systems
Alternator Pulley 3926858 3965146 for Cummins 6C8.3 B6.7 – Overhaul Component
<p><strong>Alternator Pulley 3926858 3965146, high-strength steel with surface-hardened grooves</strong> — compatible with Cummins 6B5.9, 6C8.3, B6.7, ISB6.7, QSB6.7 and related engine families across CM2150, CM2250, CM2350 and CM850 control module variants.</p> <ul> <li>Functions within the belt drive system alongside crankshaft pulley, tensioner and idler — mismatched groove profile or diameter causes belt tracking issues and premature wear</li> <li>Matched belt, tensioner and idler pulleys available as a consolidated service set for complete system refresh during overhaul</li> </ul> <p>Cross-reference part numbers verified against engine build sheets, with dimensional inspection and balance test records supplied per shipment.</p>
Belt Drive Systems
Alternator Pulley 3926858 3965146 for Cummins – System-Matched
<p><strong>Alternator Pulley 3926858 3965146</strong>, belt drive replacement for Cummins 6B5.9, 6C8.3, B6.7, ISB, QSB6.7, QSL9 and related CM-series engines — ISO-certified aftermarket condition.</p> <ul> <li>Supplied as part of a matched belt drive system refresh: pair with tensioner, idler and drive belt to address root-cause misalignment or over-tensioning that leads to premature pulley wear.</li> <li>CM2150, CM2250, CM2350 and CM2450 serial variants may differ in internal belt drive layout; confirm engine build code before ordering.</li> </ul> <p>Matched belt drive set contents verified item-by-item before dispatch.</p>
Belt Drive Systems
Alternator Pulley 3926858 for Cummins ISB6.7 ISC8.3 QSB6.7 – Direct-fit Replacement
<p>Stop wasting time and money on alternator pulleys that fail mid-shift or throw belts under load — this <strong>direct-fit Cummins alternator pulley</strong> delivers OEM-equivalent durability and precise tension retention for ISB6.7, ISC8.3, and QSB6.7 engines. Built to match the exact 24-tooth helix angle and 10.5mm pitch diameter of the original, it eliminates harmonic slip and prevents premature belt wear — a common failure point with generic aftermarket units.</p> <ul> <li><strong>Verified cross-reference</strong>: Fits 3926858, 3965146, and 3965147 applications — no guesswork needed</li> <li>Engineered for Cummins CM2250/CM2350 series platforms with factory-matched bore tolerance (Ø32.00 ±0.01 mm)</li> <li>Ready to ship today from our Guangzhou warehouse — no 4-week waits or inflated OEM pricing</li> <li>Backed by 6-month warranty and real-time technical support from Cummins-certified parts specialists</li> </ul>