Kubota RT105M, Operator'S Manual, Page: 125 / 183

Service - 124
RT105M Operator’s Manual
Recommended Lubricants/Service Key
Diesel Exhaust Fluid (DEF)
This engine requires diesel exhaust fluid (DEF) to meet emission regulations. Use only high quality DEF
meeting ISO 22241-1 or DIN 70070 requirements. Running this engine without DEF will increase exhaust
emissions and cause engine to derate. Do not dilute or contaminate DEF or substitute other fluids.
Tampering with the DEF system will increase exhaust emissions and cause the engine to derate.
DEF has other common names such as Urea, AUS 32, AdBlue, NOx Reduction Agent, and Catalyst
Solution.
DEF freezes at 11.3°F (-11.5°C) but the system is designed to prevent freezing during normal operation. If
DEF freezes in the tank when the engine is shut down, the system will quickly thaw DEF when engine is
started.
DEF has a limited shelf life. In ideal conditions, minimum expected shelf life is 18 months. At temperatures
higher than 90°F (32°C), DEF will degrade more rapidly. Do not store in direct sunlight.
Storage and transfer equipment must be compatible with DEF. Most materials (especially hoses) are not
compatible and will degrade and contaminate DEF. Never use contaminated DEF. Containers made of
polyethylene or polypropylene are recommended.
This machine will consume DEF at a rate between 2 and 3% of diesel consumption. Many factors affect
consumption rate, but a good rule of thumb is to fill the DEF tank every other time the diesel tank is filled.
Read operator’s manual. Follow safety rules and know
how to use all controls. Your safety is at stake.
273-475
To help avoid injury:
• Diesel exhaust fluid is corrosive. Avoid spills. If spill occurs wipe clean immediately.
• Avoid contact with skin. If contact occurs, rinse with water immediately.
• Avoid contact with eyes. If contact occurs, seek medical help immediately.
• Avoid ingestion. If ingested, seek medical help immediately.