Replacement Thermostat Kit for Cummins ® B/ISB/QSB Applications OEM Cross References: 3802968 Superseded/Alternate Numbers: M-3802273

Product Details

Application: Cummins 1840 Skid Loader With Rotary Injection Pump

Engine: 4B3.9L CID: 239

Notes: Long Pin, 4975, 3581, 4976, 3582, Piston Marked 2514

Bore: 4.0165’’ Stroke: 4.724’’ Rod Journal: 2.7160-2.7170’’ Main Journal: 3.2672-3.2682’’

Application & Fitment

• Engine Make: Cummins
• Engine Model / Application: B/ISB/QSB

Confirm the original part number and engine identification before ordering. Where applicable, also verify serial-number range, production year, piston style, bearing size or other configuration notes shown in the product information.

Part Numbers & Cross References

• OEM Cross Reference: 3802968
• Alternate / Superseded: M-3802273
• Interstate-McBee Reference: M-3802968

Need Help Confirming Fitment?

Use the engine model, serial number and original part number when checking compatibility. For kits and sets, review the complete component breakdown above before ordering because contents can vary by engine configuration.