21
2009 DURATECH TUB GRINDER OPERATING INSTRUCTIONS
2.3 Dry Clutch
The HPTO™ Hydraulic Power Take-off is a hydraulically actuated, enclosed dry clutch that requires no adjustment
throughout its wear life. During a torque spike, the clutch will act as a torque limiter by slipping to absorb the
shockload. The bearings in the clutch are greased for the life of the product.
A Microprocessor Controller provides remote push button controlled clutch engagement of the HPTO. The controller
monitors clutch pressure, engine speed, and an equipment safety switch.
A Hydraulic Manifold Assembly controls the pressure required for clutch engagement. System components include a
DC coil, a pressure regulating cartridge, and a pressure switch.
The pre‑programmed setting of the controller determines how the HPTO unit will function during startup.
The “Power” LED illuminates to notify the operator that the controller is receiving switched power from the engine
ignition switch.
The “Engine RPM” LED illuminates when the engine is running.
To engage the clutch, set the engine rpm below 1100 rpm, press and hold the “Engage/Disengage Button” for 3
seconds. Once the “Clutch Engage Symbol” illuminates, the button can be released. The controller will begin the
engagement of the clutch and perform a series of “bumps” to bring the driven equipment up to engine speed.
Note that there is a safety switch that prevents the rotor from engaging when the tub platform is raised.
If the engine speed is above 1100 rpm while attempting to engage the clutch, the “Engine Over‑Speed Symbol” will
illuminate. Reduce engine speed below 1100 rpm and the light will turn off.
To disengage the clutch, set engine speed below 1200 rpm and push the “Engage/Disengage Button”. The clutch will
immediately disengage.
The controller will allow 3 failed clutch startup attempts in a row. After the 3
rd
failed clutch startup attempt, the
controller will prevent the clutch from being engaged for 10 minutes.
There are 3 different conditions that are considered as “failed start attempts”. They are:
- The engine speed goes to zero and the engine stalls while the clutch is engaging.
- The operator attempts to increase engine speed while the clutch is engaging.
‑ The operator pushes the green engage/disengage button to disengage the clutch while the clutch is engaging.
If there is a pressure loss while the clutch is engaged, the controller will disengage the clutch and the “Oil Pressure Loss
Symbol” will FLASH to indicate that there was as pressure loss while the clutch was engaged.
( REV. 9-17 )
Safety Switch
Coil Fault
RPM Too High
Filter Clogged
Oil Temperature
Clutch Overload
Timed Lockout
Engage / Disengage Button
Oil Pressure
Clutch Engage
Input Speed Detected
Power
Output Speed
Detected
Pressure Transducer Detected
SAE J1939CAN
To Next Page
Loading...