The document describes the DEF Pump Diesel Exhaust Fluid Transfer Pump 115 VOLT AC / 12 VOLT DC Owners Installation, Operation, and Safety Manual.
This owners manual from Tuthill Transfer Systems covers the installation, operation, and safety requirements for the Fill-Rite 1 DEF Pump, a diesel exhaust fluid transfer pump available in 115 volt AC and 12 volt DC versions. It explains how the pump handles AUS32 (Aqueous Urea Solution 32.5%), the DEF used by diesel engines with SCR (Selective Catalytic Reduction) systems, and why the pump's materials are chosen to preserve the fluid's purity.
The manual walks through mounting options (pump only, Tote Mount, and Drum Mount), AC and DC wiring procedures, step-by-step operating instructions, troubleshooting, accessories, and technical specifications. It also includes safety warnings covering grounding, electrical code compliance, fluid compatibility, and handling practices such as draining the nozzle after dispensing to prevent DEF crystallization.
| Power options | 115 VAC / 12 VDC |
|---|---|
| Fluid | AUS32 (Aqueous Urea Solution 32.5%), Diesel Exhaust Fluid |
| Inlet/outlet threads | BSPP style, no special sealant required |
| Motor protection | Thermal overload protection |
| AC plug | 110 VAC 3-prong grounded plug on a 20 amp circuit breaker |
| Bypass valve | Integral bypass valve |
| Drum Mount capacity | Up to 55 gallon drum |
It is designed to pump AUS32 (Aqueous Urea Solution 32.5%), known as Diesel Exhaust Fluid or DEF, used by diesel engines with SCR systems.
Drain all fluid from the nozzle and store it pointing downward in the nozzle boot, since DEF left exposed to air will crystallize and can plug the nozzle.
Flush the entire dispensing system by pumping 5 to 10 gallons of DEF through it, then dispose of that fluid using approved DEF handling procedures.
Wiring should be performed only by a licensed electrician in compliance with NEC/ANSI/NFPA 70, NFPA30, and NFPA 30A, and the pump must be properly grounded.