Isuzu BB-4BG1T Engine Engine

• Speed will not rise
  Cause: Air in fuel system Remove Blinded fuel filter Replace element
• Engine will not start up
  Cause: Improper starter Replace Broken lead wire Repair Fuel shortage Supply
• Engine stop by oil failure
  Cause: Oil_shortage Supply Oil pressure switch failure Replace Blinded _ oil filter Replace element
• Engine speed is low
  Cause: Improper starter switch Replace
• Cooling water shortage
  Cause: Supply Over heat Fan_ belt looseness Adjust Blinded core of radiator Clean Engine thermostat failure Repair Voltmeter failure Replace AVR failure Burned ZNR Contact Burned rotary rectifier distributor or Disconnected rotor wiring our office Burned generator wiring Voltmeter failure Replace AVR _ failure VR failure Contact Rated voltage will not be 7 a Burned rotary rectifier distributor or our office Burned generator wiring Low speed Increase
• Compression failure
  Fix: Repair engine
• Charge or Discharged battery
  Fix: Replace Cell motor Detached or loosened or corroded . . . Repair will not mn battery terminal or revolution Fuse blow Replace Engine will : . . . not start up Improper starter switch Replace Broken lead wire Repair Fuel shortage Supply
• Blinded air cleaner
  Fix: Replace element

Compiled from service & troubleshooting documentation across every generator set that uses the Isuzu BB-4BG1T.

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.

• Sany SY135 — Excavator Tracked
• Sany SY135C — Excavator Tracked
• Xgma XG815LC — 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.