348-2387 3482387 ECU ECM Electronic Control Module CAT 3412 Excavator Engine

The 348-2387 electronic control module is the engine management unit for CAT 3412 diesel engines, handling fuel delivery timing, injection quantity, governor response and the sensor network that keeps a 3412 running at a stable load. It is the part workshops ask for when a machine drops into limp mode, when a fault code points at the control side rather than a mechanical component, or when a module has been damaged by water ingress, voltage spikes or a harness short. We supply the unit as 348-2387 and as 3482387, and each module is checked on a bench rig before packing so that it arrives ready for installation rather than as a core that needs further service.

Because the 3412 is used in excavators, generator sets, marine auxiliary units and drilling packages, the same 348-2387 / 3482387 reference is requested across several machine families. Fitment depends on the engine arrangement and the harness connector layout rather than on the model year alone, which is why we ask for the engine serial and arrangement number before confirming an order. Where a machine is being rebuilt after a failure that took out both the module and its wiring, the unit is normally ordered together with the 201-1283 harness assembly, which we also carry as 2011283, and the 320-3060 pressure sensor, listed as 3203060 as well, so that the control side of the 3412 is renewed as a matched group.

Module Highlights

Technical Specifications

Part Numbers Behind the 348-2387 Module

Control modules for this engine family travel through the aftermarket under more than one spelling, and the way a purchasing system stores a reference is rarely the way a technician writes it on a job card. We quote the 348-2387 board and the 3482387 reference for the same unit, and the same double listing runs across the whole control range we carry. The 309-5710 board used on C7.1 and 320E machines is also listed as 3095710, the 134-0670 control device fitted to C15, C18 and 3512 applications is listed as 1340670, the 201-1283 harness assembly for C9, C-9 and 330C units is listed as 2011283, and the 320-3060 pressure sensor shared by C4.4, C7.1, C15, C18 and 3512 engines is listed as 3203060. Buyers working with the 627-5898 load control valve on 330GC and 336GC excavators, or the 323-7464 relief valve on C7.1, 320GC and 330 machines, will find those references written as 6275898 and 3237464 in the same quotation, so an enquiry typed in either style reaches the correct part on the first attempt.

Control and Electrical Group Ordered With the Module

When a 3412 goes down on a control fault, the module is seldom the only item on the list. The 320-3060 sensor and its 3203060 equivalent usually go in at the same time as the board, the 201-1283 harness or 2011283 assembly replaces the wiring that caused the original failure, and the 134-0670 control device or 1340670 unit is checked whenever the machine runs a 3512 or C15 arrangement alongside the 3412. Machines fitted with a 309-5710 or 3095710 board in a second unit are quoted on the same sheet, and the 627-5898 or 6275898 load control valve plus the 323-7464 or 3237464 relief valve are added where hydraulic load sensing is part of the same repair. Packaging these references together means a workshop receives one consolidated set instead of three separate parcels arriving on different days.

Engine Parts Most Often Ordered Alongside

The 3412 overhaul list usually crosses into mechanical parts as well. Filtration comes first: the 4P-5500 filter set for 3508, 3512 and 3516 engines and its 4P5500 equivalent, the 1R-0726 oil filter and 1R0726 alternative, the 243-6350 air filter or 2436350 unit for C9 machines, and the 106-3969 air filter with the 1063969 reference for C15 and C18 engines. Fuel side demand centres on the 236-0962 injector and 2360962 equivalent for C-9 units, the 557-7627 injector or 5577627 unit for C7 and C9 engines, the 326-4635 pump head and 3264635 counterpart for 320D and 323D machines, and the 326-1644 fuel water separator or 3261644 separator for 3406B installations.

Cooling and internal engine items follow the same pattern. The 376-4216 water pump and 3764216 reference for C13 engines, the 377-3016 thermostat or 3773016 unit for C9.3, the 497-3990 thermostat assembly and 4973990 equivalent for C7.1, the 9Y-3333 heat exchanger core or 9Y3333 core for 3304 and 3306 engines, the 296-8388 impeller and 2968388 equivalent for C12, C15, C18 and 3406E units, and the 472-7445 oil cooler base or 4727445 base are all quoted in both forms. Internal parts are covered by the 574-9895 piston ring kit and 5749895 equivalent for C7.1, the 391-3732 piston kit or 3913732 kit for the same family, the 341-8888 valve push rod and 3418888 rod for C10, C12, 3176C and 3196 engines, the 7E-2464 valve seal set or 7E2464 set for 3306, 3406 and 3304 engines, and the 227-1204 gasket plus 2271204 reference for C15, C18 and 3406 applications. Mounting hardware such as the 520-7951 screw bolt or 5207951 bolt for 3512 assemblies and the 2W-0496 crankshaft gear with its 2W0496 equivalent complete the picture for a full rebuild enquiry.

Typical Applications

• 3412 in excavators - control of fuel delivery and governor response under continuous digging load, where a failing module shows up as power loss or erratic idle.
• 3412 in generator sets - stable frequency and voltage regulation through the engine control loop, critical for standby and prime power installations.
• 3412 in marine and drilling packages - sustained-load control where connector sealing and vibration resistance decide service life.

Supply for International B2B Buyers

Before You Order

Control modules are the part most often ordered in a hurry and fitted in the wrong configuration, so a short check before dispatch saves a return. Confirm the engine serial and arrangement number, confirm whether the machine runs a 24V system, and confirm the connector face on the existing unit. Where a workshop is replacing a module because of a repeat failure, the harness and sensor group should be inspected at the same time: the 201-1283 or 2011283 harness and the 320-3060 or 3203060 sensor are the two components that most often take a new board down with them. Keeping one 348-2387 or 3482387 unit in regional stock shortens the wait when a generator set or excavator is down, particularly where site access slows during the rainy season.