Fill Diesel Exhaust Fluid (DEF) Tank - FT4/Stage IV Engine

DEF contains urea. Do not get the substance in eyes. In case of contact, immediately flush eyes with large amounts of water for a minimum of 15 minutes. Do not take internally. In event DEF is ingested, contact a physician immediately. Reference Materials Safety Data Sheet (MSDS) for additional information.

To determine tractor engine type, see Engine Serial Number in Identification Numbers section of this Operator’s Manual.

Never put DEF in diesel fuel tank, or diesel fuel in DEF tank.

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To avoid drastic changes in tractor performance, always keep DEF level above topmost red mark on corner post display (A). Monitor DEF level on cornerpost display and refill as necessary. Refill DEF tank every time tractor is refueled. See Diesel Exhaust Fluid (DEF) — Use in Selective Catalytic Reduction (SCR) Equipped Engines in this section of this Operator’s Manual.

If DEF is spilled or contacts any surface other than the storage tank, immediately clean the surface with clear water. DEF is corrosive to painted and unpainted metallic surfaces and may distort some plastic and rubber components.

To fill DEF tank:

  1. Before using containers, funnels, etc. to dispense DEF, wash and rinse items thoroughly with distilled water to remove contaminants.

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    Wipe DEF tank filler cap (B), area around cap and filler neck to reduce chance of contaminating DEF.
  3. Lift DEF tank cap latch lever and turn cap 90° counterclockwise.
  4. Lift cap from filler neck.

  5. Avoid overfilling DEF tank.

    Completely filling DEF tank at lower temperatures can cause a blockage in filler neck. If temperatures are expected to reach below -11°C (12°F), do not fill DEF tank more than half way according to DEF level display on corner post. Observe temperature guidelines to assure ability to refill tank.

    Using funnel, carefully fill DEF tank. DO NOT over fill DEF tank. Best final fill level is determined by ambient air temperature guide:
    • Ambient air temperature at or above -11°C (12°F): Completely fill tank.
    • Ambient air temperature below -11°C (12°F): Keep fill tank level below the filler neck. Although main portion of DEF tank is heated to keep DEF from freezing, filler neck is not heated. Fluid in neck may freeze, preventing refill DEF tank until fluid melts.
  6. Replace and securely latch DEF tank cap. Cap can be locked with a padlock.
  7. Carefully clean any spills, using clean (preferably distilled) water.

If an unapproved fluid, such as diesel fuel, or engine coolant is added to vehicle DEF tank, see Diesel Exhaust Fluid (DEF) Tank in Service - Clean section of this Operator’s Manual.

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