Allis-Chalmers 21000 MKII Engine

• High engine temperature shutdown
  Cause: Coolant level
  Fix: Check coolant level. Replenish if necessary
• Fault lamp lights and engine shuts down after running for a period
  Cause: Oil level (engine will shut down if sensor is closed)
  Fix: Check oil level
• Low oil pressure shutdown
  Cause: Oil level
  Fix: Check oil level. Replenish if necessary
• Overspeed shutdown
  Cause: Governor and throttle linkages not free; overspeed switch
  Fix: Check governor and throttle linkages for freedom of movement; Check overspeed switch
• Overspeed light on, no shutdown
  Cause: Engine monitor board fault
  Fix: Disconnect wire at TB11-29. Light on after reset; replace engine monitor board
• Overcrank fault lamp lights and engine stops cranking after approximately 75-seconds
  Fix: See engine service manual for troubleshooting fuel system; After correcting fault, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset position, depressing Reset button, then to the required running position
• Low oil pressure light ON. No shutdown
  Cause: Engine monitor board fault
  Fix: Disconnect wire at TB11-30. Light ON after relay reset. Replace engine monitor board
• High engine temperature light ON. No shutdown
  Cause: Engine monitor board fault
  Fix: Disconnect wire at TB11-31. Light ON after relay reset. Replace engine monitor board
• Fault lamp lights, no fault exists
  Cause: Engine monitor board fault
  Fix: To check a no-fault condition, disconnect leads from TB11 terminals 29, 30 and 31. If fault lamp lights with leads disconnected, replace engine monitor board. Reconnect leads
• Fault lamp lights immediately after engine starts
  Cause: Overspeed condition as engine starts
  Fix: Check for overspeed condition as engine starts
• Engine stops cranking and fault lamp lights, after cranking approximately 75 seconds
  Fix: See engine service manual for troubleshooting fuel system; After correcting problem, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset, then back to the required running position
• Engine runs, shuts down, cranks for 75-seconds, cranking cycle stops, overcrank light ON
  Cause: Fuel supply problem
  Fix: Check fuel supply
• Engine runs, shuts down and cranks for 75-seconds. Cranking cycle stops; fault lamp lights
  Cause: Fuel supply problem
  Fix: Check fuel supply

Compiled from service & troubleshooting documentation across every generator set that uses the Allis-Chalmers 21000 MKII.

• Allis-Chalmers 555 — Backhoe Loader
• Allis-Chalmers 560 — Construction Equipment
• Allis-Chalmers D560 — Construction Equipment
• Allis-Chalmers D562 — Construction Equipment
• Allis-Chalmers DES200 — Generator Set
• Allis-Chalmers DES220 — Generator Set
• Allis-Chalmers DES250 — Generator Set
• Allis-Chalmers DES275 — Generator Set
• Fiat 21B — Dozer Tracked
• Fiatallis 21B — Dozer Tracked
• Kenworth K100 — Truck
• Kenworth W900 — Truck

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.