DEF (Diesel Exhaust Fluid) Level Gauge

IMPORTANT: It is unlawful to tamper with or remove any component of the aftertreatment system. It is also unlawful to use Diesel Exhaust Fluid (DEF) that does not meet the specifications provided.

IMPORTANT: Using incorrect or unapproved replacement parts increases risk of damage to vehicle aftertreatment system and impairs its proper functioning. When repairing the exhaust system, never interchange aftertreatment components between Interim Tier 4-Stage III B and Final Tier 4-Stage IV equipped vehicles.

NOTE: If SCR system detects a fluid other than DEF at correct urea concentration, system displays a diagnostic trouble code and 4 hour internal counter starts. After 4 hours, engine power, and speed are derated.

LV22174-UN-20JUN14

A - Normal DEF Level

B - Red Zone DEF Level

C - Zero DEF Level

D - DEF Symbol

SCR exhaust aftertreatment process is a system that uses DEF (Diesel Exhaust Fluid) and other components in the exhaust cleaning system to reduce exhaust emissions. Tractor electronic systems monitor DEF level to assure proper performance. Indicator lights and diagnostic trouble codes inform the operator when DEF level becomes critical. To maintain unrestricted tractor performance, fill up the DEF tank every time the tractor is refueled. See “Filling the DEF Tank” in the “Fuel, Lubricants, and Coolant” section in this operator manual.

Normal DEF Level

When DEF level is within this range (A) DEF symbol (D) illuminates, white, and tractor operates normally. Always keep level within this range for uninterrupted performance.

Red Zone DEF Level

When DEF level drops into the “Red Zone” (B) DEF symbol illuminates, amber. Tractor operation is not affected, but DEF tank must be refilled.

Low DEF Level

When DEF level approaches zero (C), DEF symbol flashes, engine power is reduced. The DEF tank must be refilled to return to normal tractor operation.

DEF at Low Temperatures

NOTE: The quality of the DEF is not degraded by freezing and thawing.

DEF freezes at -11°C (12°F). and flow to the SCR system stops. Tractor system senses low temperature and allowsengine to start, even with no DEF flow. Engine coolant is used to thaw fluid in DEF tank when engine is running. If system senses that DEF has thawed and SCR system is operating normally within 40 minutes, tractor is allowed to continue normal operation. If DEF flow is not sensed in 40 minutes, a diagnostic trouble code is displayed and a 4 hour internal counter starts. After 4 hours, engine power and speed are derated.