Allis-Chalmers 6138T 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
  Fix: Check governor and throttle linkages for fr[eedom of movement].
• 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.
• Fault lamp lights, no fault exists
  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
  Fix: Check fuel supply.
• Engine runs, shuts down and cranks for 75-seconds; cranking cycle stops; fault lamp lights
  Cause: Fuel supply
  Fix: Check fuel supply.

Compiled from service & troubleshooting documentation across every generator set that uses the Allis-Chalmers 6138T.

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

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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.