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EPA IT4/EU Stage IIIB 6.8-L diesel runs at a
constant 900, 1,200, 1,500, or 1,800 rpm.
Constant speed reduces engine wear, noise
levels, and fuel consumption. Top speed
provides maximum power and productivity,
while the slower settings increase efƟciency.
At 1,800 rpm, in-cab sound levels are just
68 dBa. And because the engine runs at
a constant speed, bystander noise is also
less noticeable.
644K Hybrid delivers up to 25-percent
better average fuel efƟciency than its
conventional IT4 counterpart with a lockup
torque converter. In applications such as
V-pattern truck loading, fuel savings will
be even larger.
Brushless A/C generator and motor, water-
cooled brake resistor, and solid-state power
electronics deliver long-term reliability and
durability.
Purpose-built PowerShift™ transmission
provides smooth moves through four
forward speed ranges. Direction changes
are performed by the electric motor, totally
eliminating shifting in some truck-loading
applications.
Coast control functions similar to dynamic
braking in a hydrostatic transmission,
slowing down the loader without touching
a pedal and helping reduce service-brake
component wear.
Hybrid-electric drive smoothly and efƟciently
recaptures energy to slow the loader when
the operator lets off the accelerator. This
lessens the load on the engine and reduces
fuel consumption.