Milton CAT 336E L - Manual (Page 3)

Hydraulics
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HydraulicHorsepower
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 E Series moving
more material in less time.
MainControlValveandAuxiliaryValves
The 336E uses a high­pressure system to tackle the toughest
of work in short order. A new one­piece, cast­block, back­
to­back main control valve features resized and reshaped oil
passages to improve efficiency and serviceability; stackable
auxiliary valve attachments mount on top of the main
valve, which allows for auxiliary hydraulic lines and valve
configurations to be simplified for greater reliability.
ReturnFilter
The return filter is a capsule­type 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 fi lter warns
the operator if it is full or exceeds a certain pressure level.
SwingPriorityCircuit
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 finely tuned control,
which is critical during material loading.
ElectricBoomRegenerationValve
A new electric boom regeneration valve minimizes pump fl 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.
StickRegenerationCircuit
The 336E regenerates the flow of oil from the rod end of
the stick cylinder to the head end of the stick cylinder during
low­load, stick­in operation – an approach that saves energy
and expense.
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