John Deere Alternator 12V 94 Amp for 4440 Tractor, 644E Loader, 648E Skidder

Fits Models At A Glance:

John Deere Tractors:

• 4000 with air, After Serial Number 263481

• 4020 with air, After Serial Number 263481

• 4030, 4040 without cab,

• 4050 with roll guard

• 4230, 4240, 4250 with roll guard

• 4430, 4440 Before Serial Number 041196

• 4450 with roll guard

• 4620 After Serial Number 014118

• 4630, 4640, 4650 with roll guard

• 4840, 4850 with roll guard

• 6030 531A with air

• 7020 After Serial Number 002264

• 7520

• 8430 Model Year 1974 to 1981 Before Serial Number 004799

• 8430 Model Year 1974 to 1981 Serial Number 004800 to 006278

• 8630 Before Serial Number 008619

John Deere Backhoe Loaders:

• 410D

John Deere Wheel Loaders:

• 544E, 644E

John Deere Forestry Skidders:

• 540E, 548E, 640E, 648E, 748E

John Deere Forestry Wheeled Feller Bunchers:

• 643D

Common Use Case or Symptoms:

Use when the charge light stays on, the batteries go flat overnight, or the alternator whines and puts out under 13 volts at the post — a failing alternator on a 4440 with a cab load will strand it before the end of the shift.

Key Notes:

• Part Numbers: TY6686-N, TY6686, TY6600, TY6625, AT142267, RE13797, RE27109, RE31694, SE501372, SE501383
• Weight: 12 lbs
• Application: Alternator, charging system
• Style/Type: Delco, new unit
• Dimensions: 12 volt, 94 amp output
• Serial Number Notes: 4000 and 4020 fit After Serial Number 263481 with air. 4440 with cab fits Before Serial Number 041196. 4620 fits After Serial Number 014118. 7020 fits After Serial Number 002264. 8630 fits Before Serial Number 008619. The 8430 splits three ways — base, Before Serial Number 004799, and Serial Number 004800 to 006278.
• Interchange Numbers: Case-IH A46938, 1105514, 103801A1R, 103802A1R, 103804A1R, 87297246, Allis-Chalmers 79004870NH, 79004870V
• Manufacturer: A & I Products
• Replacement Part for John Deere Equipment

Why Choose Broken Tractor:

• ✅ Ninety-Four Amps, Not Seventy-Two: Output is printed because the 4040 and 4440 shipped with more than one alternator size, and the wrong one browns out the cab load.
• ✅ New Delco Build: A new unit rather than a rebuilt core, so nothing has to go back and there is no core deposit held.
• ✅ Eight Serial Splits Documented: This alternator changes by serial and by cab or roll-guard configuration on nine models, and every split is written out above.