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1 1 5 0 / 1 1 5 5 H A Y B U S T E R T U B G R I N D E R O P E R A T I N G I N S T R U C T I O N S
Section 2: Introduction
2.1 Description of the 1150/1155 Haybuster Tub Grinders
The Tub Grinder is designed to grind most types of hay, grain and crop residue such as stover and straw. 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 flow to the tub drive mechanism is
regulated proportionally to the engine speed. When the en-
gine begins to lug down, the hydraulic oil flow 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 pro-
portionally to keep the engine at this RPM. The result is
a nearly constant load on the engine, which will maximize
grinding efficiency.
See section 3.10 (pg. 28) for calibra-
tion 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.
figure 2.1 model RCB93 electronic governor