24V Fuel Pump 446-5409 for Caterpillar CAT Excavator 312E 312F 313F

446-5409 24V Fuel Transfer Pump

The 446-5409 fuel transfer pump is designed for Caterpillar heavy-duty diesel engine fuel systems. The 24V electric pump transfers fuel from the tank and maintains a stable supply to the engine fuel system.

It features a 2-pin DT electrical connector, an M16 outlet port and mounting points designed for M10 hardware.

Compatible Equipment Models

Excavator: 312E, 312E L, 312F, 313F, 313F L, 314E CR, 314E LCR, 314F CR, 315F LCR, 316E L, 316F, 316F L, 318E L, 318F, 318F L, 320, 320 GC, 320E, 320F L, 323, 323E L, 323F, 324E, 325F, 326F, 329E, 329F L, 330F, 335F

Wheeled Excavator: M314F, M315F, M316F, M317F, M318F, M320F, M322F, M323F

Wheel Loader: 924K, 930K, 938K, 950K, 962K

Track Loader: 953K, 963, 963K

Track-Type Tractor: D5, D6K2 LGP, D6K2 XL, D6N, D6N LGP, D6N XL

Asphalt Paver: AP500F, AP555F, AP600F, AP655F, AP-1000E, AP-1000F, AP-1055E, AP-1055F

Compactor: CP-533E, CS-433E, CS-533E, 815K, 816K

Material Handler: MH3022, MH3024, MH3026

Common 446-5409 Fuel Pump Problems

A worn or damaged electric fuel transfer pump may be unable to provide the stable fuel flow required by the engine. This can cause hard starting, irregular idling, engine hesitation or reduced power under load.

Common signs of fuel transfer pump failure include:

Hard or delayed engine starting

Low or unstable fuel pressure

Irregular engine idling

Engine hesitation during acceleration

Reduced power under heavy load

Intermittent engine shutdown

Fuel leakage around the pump or connections

No pump operation after switching on the power supply

Replacing the failed pump with a matching 446-5409 24V unit can help restore stable fuel delivery and normal engine operation.