Engine – Milton CAT 320E L User Manual
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Engine
Reduced emissions, economical and reliable performance
Cat
®
C6.6 ACERT™ Engine
The Cat C6.6 ACERT engine delivers more horsepower 
using significantly less fuel than the previous series engine. 
Emissions Solution
Equipped to meet U.S. EPA Tier 4 Interim emission standards, 
the 320E’s C6.6 ACERT engine features an aftertreatment 
regeneration solution that requires no operator intervention. 
The regeneration process automatically starts once the 
filtering system reaches a certain level – with no interruption 
to machine performance or the work process. 
Biodiesel-Ready Fuel System
The C6.6 ACERT engine is equipped with an electronic-
controlled high-pressure fuel system that includes an electric 
priming pump and three-layer fuel hoses to allow the use 
of biodiesel (meeting ASTM 6751 or EN 14214) up to 
B20 (biodiesel 20% mixture). 
Cooling System
The cooling system features an air-to-air aftercooler and 
A/C condenser that tilt up and swing out of the way for easy 
servicing; the viscous fan automatically adjusts to ambient 
temperatures to help reduce fuel consumption and noise. 
Speed and Power Control
The 320E features speed control to maintain a constant 
speed – regardless of load – to improve fuel economy. 
Three different power modes are offered: high power, 
standard power, and economy power. The operator can 
easily change between modes through the monitor or 
console switch to meet the needs for the job at hand – 
all to help manage and conserve fuel. 
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