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3126 Caterpillar Engines


Caterpillar 3126 engines are used in many work applications such as  delivery trucks, dump trucks, garbage trucks, snow plows, flatbed trucks and school buses. The 3126 is also used in many agricultural nd industrial applications such as lift trucks, ag sprayers, cranes, power units, generator sets, tractors, excavators, wheel loaders, compactors, articulated trucks and backhoes. NPD can also supply a marine engine in a long block configuration.

3126 Engine Drop-in Engine

Piston assemblies
Valve train (lifters, pushrods & rocker arms)
Cylinder Heads
Oil Cooler
Water Pump

Intake Manifold

Valve Cover

Front Cover

Water Pump & Pulley Damper


Injection Pump & Lines


Exhaust Manifolds

Fuel Transfer Pump

Electronic Complete Engines will also include:

Injection Pressure Sensor

Coolant Temperature Sensor

Boost Pressure Sensor

Air Temperature Sensor

Timing & Speed Sensor

Oil Pressure Sensor

Atmospheric Sensor


NPD will custom build many Caterpillar 3126 engines. NPD has
 now added custom build engines for the higher (above 250HP) horsepower units. For more information contact NPD at 888-301-1521


Before calling to request price and availability, please gather the following information from the data tag located on the valve cover: 

Serial number
Arrangement number
Vehicle/equipment make and model
Sump location (front, rear, center)

Warranty Coverage


Complete Drop-In configurations: 2yr/unlimited mileage. 2nd year long block coverage only. 


Complete Drop-In configurations: 1yr/2,000 hours.


Marine Long Block configuration: 1yr/2,000 hours.

Some restrictions apply; see limited warranty details or call for more information.

Caterpillar®: 3126 Diesel Engine ©2003 NPD All Rights Reserved. July 2010. (TD)

Click on Pictures to View Options.

Please be sure to view the Core Deposit that is associated with the engine you are ordering. The core deposit will need to be paid upfront before the engine(s) ships.

​Freight Charges: Most of our Remanufactured engines include FREE Shipping both ways within the Continental United States.

Some of our Bare Long Blocks, Used & Reconditioned engines do have additional shipping fees. Please contact us for a freight quote.

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