Hydraulics
Power to move more dirt, rock, and debris with speed and precision
Hydraulic Horsepower
Hydraulic horsepower is the actual machine power available
to do work through implements and work tools. It’s much
more than just the engine power under the hood – it’s a core
strength that differentiates Cat machines from other brands.
In fact, hydraulic horsepower for the 336E increased from
the previous series’ output due to pump and other system
improvements. This translates into the new ESeries moving
more material in less time.
Main Control Valve and Auxiliary Valves
The 336E uses a high-pressure system to tackle the toughest
of work in short order. A new one-piece, cast-block, back-
to-back main control valve features resized and reshaped oil
passages to improve efciency and serviceability; stackable
auxiliary valve attachments mount on top of the main
valve, which allows for auxiliary hydraulic lines and valve
congurations to be simplied for greater reliability.
Return Filter
The return lter is a capsule-type design with a cartridge
inside. Unlike many competitors’ offerings, the Cat cartridge
features a handle to help remove and change without oil
spillage or contamination. A sensor attached to the lter warns
the operator if it is full or exceeds a certain pressure level.
Swing Priority Circuit
The swing priority circuit on the 336E uses a new electric
valve that’s operated by the machine’s improved Electronic
Control Module (ECM). Compared to using a hydraulic
valve, an electric valve allows for more nely tuned control,
which is critical during material loading.
Electric Boom Regeneration Valve
A new electric boom regeneration valve minimizes pump ow
when the boom lowers down, which improves fuel economy.
It is optimized for any dial speed setting being used by the
operator, which in turn aids controllability and enhances
component durability.
Stick Regeneration Circuit
The 336E regenerates the ow of oil from the rod end of
thestick cylinder to the head end of the stick cylinder during
low-load, stick-in operation – an approach that saves energy
and expense.
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