Compare 2025–2026 heavy-duty fleet service-life benchmarks for fuel injectors, injection pumps, filters, starters, water pumps, and engine valves. Learn common failure causes and maintenance steps to help reduce downtime.
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files/fuel-injection-pump-101040-8873-8970209294-fit-for-isuzu-engine-4bg1-4bd1-t-hitachi-excavator-ex120-3-ex120-2-ex120k-2-9943525.png
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files/fuel-injection-pump-101040-8873-8970209294-fit-for-isuzu-engine-4bg1-4bd1-t-hitachi-excavator-ex120-3-ex120-2-ex120k-2-6917332.png
files/fuel-injection-pump-101040-8873-8970209294-fit-for-isuzu-engine-4bg1-4bd1-t-hitachi-excavator-ex120-3-ex120-2-ex120k-2-7416807.png
files/fuel-injection-pump-101040-8873-8970209294-fit-for-isuzu-engine-4bg1-4bd1-t-hitachi-excavator-ex120-3-ex120-2-ex120k-2-7591907.png
files/fuel-injection-pump-101040-8873-8970209294-fit-for-isuzu-engine-4bg1-4bd1-t-hitachi-excavator-ex120-3-ex120-2-ex120k-2-9091305.png
The Isuzu 4BG1 and 4BD1 are the workhorses behind Hitachi’s EX120 excavator series — machines built for demanding earthmoving, trenching, and demolition work where uptime is critical. When the injection pump starts losing pressure or misfueling, your excavator loses digging force and burns fuel inefficiently. This direct-fit replacement restores full injection pressure and timing precision, getting your EX120 back to peak performance on the job site.
Fuel Parts Depot
The Isuzu 4BG1 and 4BD1 are the workhorses behind Hitachi’s EX120 excavator series — machines built for demanding earthmoving, trenching, and demolition work where uptime is critical. When the injection pump starts losing pressure or misfueling, your excavator loses digging force and burns fuel inefficiently. This direct-fit replacement restores full injection pressure and timing precision, getting your EX120 back to peak performance on the job site.
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We offer 12-month warranty against defects in materials or workmanship.
All parts listed on Fuel Parts Depot are aftermarket replacement parts manufactured by independent suppliers. They are not genuine OEM (Original Equipment Manufacturer) parts and are not made by, affiliated with, or endorsed by the original equipment manufacturers, including but not limited to Perkins, Isuzu, Kubota, Yanmar, Caterpillar (CAT), Cummins, JCB, or any other brand referenced on this site. Brand names and model references are used solely for compatibility identification purposes. Our aftermarket parts are designed and tested to meet or exceed OEM specifications.
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| Year | Make | Model | Engine |
|---|---|---|---|
| — | Isuzu, Hitachi | EX120-2, EX120-3, EX120K-2, EX120K-3 | Isuzu 4BG1, 4BD1-T, 4BD1 |
Compare 2025–2026 heavy-duty fleet service-life benchmarks for fuel injectors, injection pumps, filters, starters, water pumps, and engine valves. Learn common failure causes and maintenance steps to help reduce downtime.
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