Perkins 1104D-E44TAG1 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.

Shared across brands: FG Wilson, Perkins, Terex

How to read your Perkins engine serial & model number →

• Voltage does not come up to the rated voltage
  Cause: Internal problem with the generator end
  Fix: Check for even reading across the lines, if they are not this would mean you probably have a problem with the wiring of the switch or generator. If the generator voltage reads correctly, contact the TEREX service department.
• Uneven reading between the legs when applying 24 volts to the field wires
  Fix: Recheck your wiring connections. After you have the field wire connected start the unit again and check your output voltage. It may still be necessary to flash the fields to restore residual voltage.
• TROUBLE LIGHT on CONTROL PANEL is illuminated
  Cause: Broken fan belt
  Fix: Inspect fan belt and replace as needed
• No generator output voltage
  Cause: Circuit breaker tripped
  Fix: Reset circuit breaker
• Malfunction discovered
  Fix: Identify symptoms, troubleshoot, perform repair, return to service
• Low generator output voltage
  Cause: Voltage adjustment set too low
  Fix: Adjust voltage potentiometer
• Low engine speed
  Fix: Call TEREX Service
• High generator output voltage
  Cause: Voltage adjustment potentiometer set too high
  Fix: Adjust potentiometer
• High engine speed
  Fix: Call TEREX Service
• Fluctuating or surging generator output voltage
  Fix: Check engine fuel, oil, and air filters
• Fluctuating generator output voltage stability
  Cause: Load may be the cause
  Fix: Redistribute load if possible
• Engine won't crank
  Cause: Loose battery cable
  Fix: Check cables and battery electrolyte level. Recharge as necessary
• Engine shuts down
  Cause: Oil Pressure Switch not opening automatically and TROUBLE LIGHT on
  Fix: Improper coolant use a 50/50 on
• Engine runs, but loses power under load
  Cause: Clogged fuel system
  Fix: Check fuel system

Compiled from service & troubleshooting documentation across every generator set that uses the Perkins 1104D-E44TAG1.

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

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

• Air filter: Fg Wilson 901048 Fg Wilson 901050 Perkins 901048 Perkins 26510343 Donaldson P828889 Donaldson P829333 Wix 46562 Wix 46569
• Oil filter: Fg Wilson 901103 Perkins 901103 Donaldson P554407 Wix 51459 Ac Delco SX Baldwin BT237

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

• Dieci AGRI PLUS SERIES — Telehandler
• Manitou MLT 634 -120 LSU — Telehandler
• Manitou MLT 634 -120 LSU POWERSHIFT — Telehandler
• Manitou MLT 735 -120 LSU — Telehandler
• Manitou MLT 735 -120 LSU POWERSHIFT — Telehandler
• Manitou MLT 741 -120 LSU — Telehandler
• Manitou MLT 741 -120 LSU POWERSHIFT — Telehandler
• Massey Ferguson MF5445 — Tractor
• Massey Ferguson MF5455 — Tractor
• Massey Ferguson MF5460 — Tractor
• Massey Ferguson MF6445 — Tractor
• Massey Ferguson MF6455 — Tractor

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.