Fuel injector illustration – not the actual part
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Fuel injector illustration – not the actual partDiesel Parts Direct logo

Aftermarket parts may appear slightly different, including the packaging.

John DeereJohn Deere 400 Series Fuel System

DS-AR50781 Fuel Injector For John Deere Diesel Engines

(Pencil Type)

MARKED 18270, 18421, 18646, 18660, 18767, 18768, 20364, 20494

OEM #: AR50781SKU: DSAR50781

Ships in 1-2 days

$100.94

Taxes and Shipping are calculated at checkout

Special Order Item - not eligible for return

This part can be used on the following John Deere diesel engines:

  • 4-270D (block marked R40700, R47520, R48430, R50610, R72127, R32020, R40850, R40910, R46350, R46430)
  • 6-404A/6-404T (block marked R43310, R45980, R47020, R47110)
  • 6-404D (block marked R33180, R34340, R40890, R40900, R40610, R40620, R45950, R47170, R48440, R40930, R49470, R49650, R59850, R72128, R87558)

This part can be used for engines installed in the following applications:

  • Backhoes: 500C, 510, JD500A, JD500B
  • Combines: 105, 6600, 6602, 7700
  • Compactors: JD646
  • Excavators: JD690, JD690A
  • Forage harvesters: 5200
  • Power units: 6404
  • Tractors: 3020, 4000, 4020, 4040, 4230, 4320, 4520, 4620, 7020, JD500, JD600
  • Wheel loaders: JD644, JD644A
SKU DSAR50781
OEM Number AR50781
Part Type Fuel System, Other
OEM Brand JOHN DEERE

Aftermarket warranty

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  • Orders are processed the same or next business day
  • Expedited shipping options available at Checkout
  • If same-day shipping is critical, please call to confirm availability

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Call any of our friendly Parts Dept. Specialists with your engine serial number, and we can quickly verify whether this part is the correct part for your engine — no guesswork.

Phone: 888.687.0539

Don't know how to find your engine serial number? Go to our Engine Help Center for assistance.