18
HD-8 SERIES V
O P E R A T I N G I N S T R U C T I O N S
2.3 R
2.3 R
2.3 R
2.3 R
2.3 Rotor c
otor c
otor c
otor c
otor clutc
lutc
lutc
lutc
lutch
hh
hh
The clutch engages and disengages the rotor shaft. Engagement and disengagement of the clutch is accomplished
through the use of a manually operated lever that is located on either side at the front of the engine.
2.4
2.4
2.4
2.4
2.4 T
T
T
T
Tor
or
or
or
orque limiter
que limiter
que limiter
que limiter
que limiter
The torque limiter is installed to prevent or reduce damage to the engine and clutch in the event of an instantaneous
stop due to a rotor overload.
2.5 R
2.5 R
2.5 R
2.5 R
2.5 Rotor
otor
otor
otor
otor
The rotor is the heart of the grinder. The standard rotor contains swinging hammers and is used for general grinding.
When larger objects such as large logs are to be ground, fixed hammers are used.
2.6 Scr
2.6 Scr
2.6 Scr
2.6 Scr
2.6 Screens
eens
eens
eens
eens
The DuraTech Industries HD-8 industrial tub grinders come equipped from the factory with one screen. The factory
equipped screens is a 4” diameter hole screen.
The size of the ground material is determined by the diameter of the screen holes. As the diameter of the screen holes
becomes larger, the size of the ground material increases.
As a general rule, use the largest screen capable of doing the job.
Round perforated screens are available with 2", 3", 4" and 5" diameter holes in 1/2" thick steel. A 6" x 7" demolition
screen is also available. The demolition screen is used for size reduction on construction debris, demolition debris and
wet materials.
2.7
2.7
2.7
2.7
2.7 T
T
T
T
Tub
ub
ub
ub
ub
Material to be ground is loaded into the tub using a wheel loader, or other suitable methods. As the tub rotates, the
material is fed into the rotor. The faster the tub rotates , the more material is exposed to the rotor, and the greater the
load on the engine. The tub’s rotation speed is controlled by the electronic governor. To reduce the amount of material
thrown by the rotor during operation, the tub should be kept 1/2 to completely full during grinding operating.
The HD-8’s tub can be tilted 50 degrees for access to the rotor, screens, and drive line. The tub has an electronic safety
switch that will not allow the tub to be raised with the rotor turning. The switch provides feedback to the operator
through two indicator lights which are located on the control panel. If the green indicator light is on, the operator may
tilt the tub. Conversely, if the red indicator light is on, the safety switch will prevent the operator from tilting the tub.
