Duratech 2009 - Section 2: Component Descriptions; Electronic Governor and Controls

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2009 DURATECH TUB GRINDER OPERATING INSTRUCTIONS
Section 2: Introduction
2.1 Description of the 2009 DuraTech Tub Grinder
The Tub Grinder is designed to grind wood waste, green waste, construction and demolition debris, tree branches and
trunks, compostables and mulch. The unit incorporates a number of basic features including the engine, electronic
engine controls, rotating tub, the electronic governor, the rotor and hammer assemblies, the tub chain and drive
assemblies, as well as the belly and discharge conveyors assemblies.
Material is fed into the tub of the unit by appropriate means, such as a wheel loader. As the tub rotates, the material is
exposed to the rotating hammers. The hammers then grind the material before the material is discharged by the belly
and discharge conveyors.
2.2 Electronic governor
The Model RCB93 Electronic Governor regulates the speed at which the tub rotates. The electronic governor has
two modes of operation, the Engine (Auto) mode and the Tub (Manual) mode. The Engine (Auto) mode is the
preferred mode of operation and should be used whenever possible.
Engine (Auto) Mode
When the electronic governor is switched to the Engine
(Auto) mode, it is monitoring the rotation speed of the
engine. The hydraulic ow to the tub drive mechanism
is regulated proportionally to the engine speed. When
the engine begins to lug down, the hydraulic oil ow is
reduced which in turn slows down the tub rotation. With
proper calibration, the engine will only lug down to its
optimum horsepower RPM and the tub rotation will be
varied proportionally to keep the engine at this RPM. The
result is a nearly constant load on the engine, which will
maximize grinding efciency. See section 3.10 (pg. 32)
for calibration instructions.
Tub (Manual) Mode
In this mode the tub speed is constant and it will not change to match varying load conditions.
IMPORTANT: Except when calibrating or trouble shooting the electronic governor always use the
Engine (Auto) mode of the electronic governor.
gure 2.1 model RCB93 electronic governor
( REV. 08-04 )
( REV. 08-04 )