Allis-Chalmers 649-T Engine

The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.

Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.

• 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 immediately after engine starts.
  Fix: Check for: Overspeed condition as engine starts.
• Fault lamp lights and engine shuts down after running for a period.
  Fix: Check the following: - Oil level. Engine will shut down if sensor is closed. - Check engine manual for troubleshooting oil system. - High engine temperature. Check coolant level; check water flow (city water cooled systems); check radiator.
• Engine stops cranking and fault lamp lights, after cranking approximately 75 seconds.
  Fix: See engine service manual for troubleshooting fuel system.
• Engine runs, shuts down, cranks for 75 seconds, cranking cycle stops, overcrank light ON.
  Fix: Check fuel supply.
• *Low oil pressure shutdown.
  Fix: A. Oil level. Replenish if necessary. b. Sensor. Faulty sensor will shut down engine. c. Refer to engine service manual for troubleshooting guide for oil system.
• "Overspeed shutdown.
  Fix: Check governor and throttle linkages for freedom of movement. Check overspeed switch.
• "Overspeed light on, no shutdown.
  Fix: Disconnect wire at TB11-29. Light on after reset; replace engine monitor board.
• "Low oil pressure light ON. No shutdown.
  Fix: Disconnect wire at TB11-30. Light ON after relay reset. Replace engine monitor board.
• "High engine temperature shutdown.
  Fix: A. Coolant level. Replenish if necessary. b. City water cooled sets. Check water flow, valves, etc. c. Check sensor; check thermostat. d. Radiator model, check fan belts, radiator for obstructions, etc.
• "High engine temperature light ON. No shutdown.
  Fix: Disconnect wire at TB11-31. Light ON after relay reset. Replace engine monitor board.

Compiled from service & troubleshooting documentation across every generator set that uses the Allis-Chalmers 649-T.

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

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

• Air filter: Allis-Chalmers 264740 Allis-Chalmers 264739 Allis-Chalmers 71181296 Donaldson P526407 Donaldson P526410 Donaldson P119778 Wix 42758 Ac Delco A811C
• Fuel filter: Allis-Chalmers 74036711 Allis-Chalmers 4394407 Donaldson P552603 Donaldson P558000 Ac Delco TP1246 Wix WF10064 Ac Delco TP1002

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

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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.