10R-0967 CAT Fuel Injector | C10 C12 Diesel Injector

The 10R-0967 fuel injector is the final metering point between rail pressure and combustion for Caterpillar C10 and C12 diesel platforms. This electronic unit injector determines fuel quantity, injection timing, and atomization quality on a cylinder-by-cylinder basis. For workshops maintaining heavy equipment in construction, mining, and agricultural sectors, the 10R-0967 is not a generic replacement part. It is the component that decides whether a high-hour engine idles clean under cold start, holds power under load, and avoids the black smoke signature that triggers operator complaints. The part crosses to several OEM and aftermarket reference numbers, and understanding those distinctions matters before ordering.

The 212-3462 number is frequently listed as an interchangeable reference. Repair kit cross-numbers include 212-3463, 212-3467, 212-3468, and 317-5278 for shops that rebuild rather than replace. Note the 10R-0967 is specific to C10 and C12 engines. It does not cover C9, 3176, or 3196 platforms despite occasional supplier listings that conflate these families.

Machine applications extend well beyond engine model designations. The C10 and C12 power several Caterpillar machine series that diesel repair shops encounter regularly. Wheeled excavators in the W345B II class rely on this injector set. Tracked excavators 345B, 345B II, 345B L, and 345B II MH also use the 10R-0967 in their C10 or C12 configurations. On the industrial engine side, the C-10 industrial and C-12 industrial ratings appear in generator sets, compressor packages, and irrigation power units. Agricultural operations running older Caterpillar-powered equipment represent another steady demand channel. The common thread across all applications is sustained duty cycle under load, which accelerates internal valve wear and makes injection accuracy the primary performance variable.

Technicians who rush a 10R-0967 installation often see the same injector return within months. The copper nozzle washer must be replaced every time, and the injector bore needs cleaning before insertion. Reusing a compressed washer guarantees compression leakage past the nozzle seat, which cooks the injector tip and creates hard-start symptoms that mimic electrical failure. Lubricate the O-rings with clean engine oil before pushing the injector into position. The hold-down clamp bolt torque must be verified against the specific engine platform, over-torquing deforms the injector body and under-torquing allows vibration damage. On C10 and C12 engines, new high-pressure oil rail seals and a fresh injector harness connector are sensible additions during replacement. Finally, every 10R-0967 carries a calibration code that must be programmed into the ECM. Skipping this step produces rough idle, smoke, and fault codes even with a perfectly good injector.

For a diesel repair shop, the 10R-0967 represents more than a parts sale. Internal valve wear is the dominant failure mode. Control valve seat surfaces degrade after millions of cycles, causing internal fuel leakage that saps hydraulic performance and produces hard starting, unstable idle, and measurable power loss. Field service data indicates these injectors can develop significant leakage rates after high operating hours, with one report measuring a 28% internal leakage rate in severe cases. A worn 10R-0967 also compromises spray pattern quality. Oversized droplets burn poorly, create piston crown hot spots, and produce visible black smoke under acceleration. Catching these symptoms early through leak-back testing and cylinder balance diagnostics lets shops replace only the affected injector before contamination spreads through the fuel system. That diagnostic discipline is what separates a profitable injector job from a repeat failure and an unhappy fleet customer.

Q1: Can I mix new and reman 10R-0967 injectors in the same C12 engine?
A: Technically yes, but flow balance across cylinders becomes unpredictable. If the existing injectors have similar hours, replacing the full set is the more reliable path.

Q2: Why does a reman 10R-0967 sometimes cost nearly as much as new aftermarket?
A: Quality reman units include new solenoids, precision nozzles, and flow testing. The labor and parts inside a proper rebuild carry real cost.

Q3: What fuel system condition causes repeat 10R-0967 failure?
A: Contaminated fuel is the leading culprit. Rust, water, or microbial growth passes through filtration and damages the control valve seat surfaces.

Q4: How does a shop verify a 10R-0967 is actually bad before pulling it?
A: Leak-back testing, cylinder contribution tests, and injector correction values from a diagnostic scan give the clearest picture without teardown.

Q5: Is the 10R-0967 the same as the 212-3462?
A: The 212-3462 is a common cross-reference. Confirm your specific engine serial number before ordering, as CAT changed injector specifications across production runs.

Q6: Do distributors need to stock core return handling for these injectors?
A: Most reman 10R-0967 suppliers require cores. Having a core management process prevents chargebacks and keeps wholesale margins predictable.