Cummins 3924435 — Genuine Harmonic Balancer / Vibration Damper for 5.9L 12V

MPN: 3924435  |  Also Known As: harmonic balancer, vibration damper, crankshaft damper  |  Cross-Refs (ID only): Mopar 04746693 / 4746693, PAI 202013

Genuine Cummins rubber-tuned vibration damper that restores proper torsional control on the 5.9L 12-valve. Designed to reduce crankshaft harmonics and protect bearings, timing components, and accessories. Direct OEM fit. Sold individually (1 per engine).

Features & Benefits

• OE tuned elastomer between the hub and inertia ring for precise damping.
• Direct-fit replacement for 2nd-gen 5.9L 12V applications.
• Reduces vibration to help extend accessory drive, timing gear, and bearing life.
• Restores smooth idle and reduces cab buzz from a separated or aged damper.
• Built to Cummins standards for long service life and reliable performance.

Verified Fitment (Automotive)

Industrial/Off-Highway: Used primarily on Tier 2 5.9L B-Series engines and select 6B5.9 variants—verify by ESN before ordering.

Specifications

• Type: Rubber-tuned crankshaft vibration damper (harmonic balancer)
• OE Part Number: 3924435
• Cross-References (ID only): Mopar 04746693 / 4746693; PAI 202013
• Quantity Required: 1 per engine (sold individually)

Often Paired With

• ARP Damper Bolt Kit: 147-2502 (set of 4, high-strength)
• Front Crankshaft Seal Service Kit: Cummins 3937111
• KDP Fix (12V timing case dowel pin) kit: recommended while front cover is accessible

What’s In The Box

• (1) Genuine Cummins Harmonic Balancer / Vibration Damper (3924435)
• Hardware and seals sold separately (see “Often Paired With”).

Installation Tips

• Set engine at TDC so timing mark indexing is straightforward during reassembly.
• Use new damper bolts and torque per factory spec; follow ARP instructions if using ARP hardware.
• Inspect the front main seal and replace with kit 3937111 if any seep is present.
• After install, verify belt tracking and check for runout or wobble at idle.

FAQ

WILL THIS FIT MY 1994–1998 12-VALVE CUMMINS?

Yes—3924435 is the OE damper for most 1994–1998 5.9L 12V Ram 2500/3500 applications (verify by VIN/ESN).

DOES THIS COME WITH NEW BOLTS?

No—bolts are sold separately. We recommend the ARP 147-2502 kit for maximum clamping and reliability.

WHAT ABOUT 1998.5–2002 24-VALVE TRUCKS?

Those typically use different dampers (e.g., 3918999 / 3915069). Order the part that matches your VIN/ESN.

HOW DO I KNOW MY DAMPER IS FAILING?

Signs include visible rubber separation, wobble, accessory belt walk, vibration, or rough idle. Replace promptly to protect the crankshaft and bearings.

IS THIS A GENUINE CUMMINS PART?

Yes—OE Cummins 3924435, built to factory specs for fit and damping performance.