Isuzu 4LE1 2.2L Engine

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• Unit will not crank when power fails
  Cause: Digital genset not in AUTO Transfer control switch not in AUTOMATIC position Incorrect wiring between ATS and genset Defective control relay in ATS Fuse(s) blown in the DSE 7310 MKII Defective DSE 7310 MKII Loose or dirty battery terminals Defective starter Defective start solenoid Low/dead battery
• No output from AC generator
  Cause: Loss of speed signal Loss of run signal Engine will not come up to speed after it starts Insufficient fuel volume getting to the unit 1. Too small of fuel line 2. Fuel racks not open properly Governor is defective AC short in generator components
• Engine won’t crank
  Cause: Low/dead battery Blown DC fuses Defective DSE 7310 MKII Defective key switch Loose or dirty battery terminals Defective starter Defective start solenoid
• Engine starts, then stops and alarm light comes on
  Cause: Engine oil pressure is low Engine has high water temperature Engine has overspeed Engine has gone into overcrank
• Engine cranks but will not start
  Cause: Improper fuel delivery to the unit Fuel supply shut off Fuel tank empty Air in the fuel system Engine fuel solenoid has not opened Defective fuel pump Defective fuel solenoid Defective engine harness Improper battery voltage to fuel pump or fuel solenoid
• ATS will not transfer to Emergency Supply (generator)
  Cause: No AC generator output Defective ATS control board. See ATS manual Circuit breaker open or defective
• ATS will not re-transfer to normal power
  Cause: Proper power line not available at line terminals in ATS panel Defective ATS control board. See ATS manual

Compiled from service & troubleshooting documentation across every generator set that uses the Isuzu 4LE1 2.2L.

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

• Air filter: Isuzu 5864014350 Isuzu 8972599390 Donaldson P775687 Donaldson P821575 Donaldson P822858 Wix 46368 Wix 46438NP Wix 42985
• Fuel filter: Isuzu 8944015310 Donaldson P502166 Wix 33263
• Oil filter: Isuzu 5876100080 Donaldson P550162 Wix 51334 Ac Delco X45

Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.

• Hitachi EX40U — Excavator Compact
• Hitachi EX50U — Excavator Compact
• Hitachi EX55UR-3 — Excavator Compact
• Hitachi EX58MU — Excavator Compact

Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.