Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA
20
Bulletin HY25-1650-M1/US
Installation Instructions
Control Adjustment Instructions (Continued)
Setting Procedure - Re-Engagement Modes
1. Turn Off the unit to set the re-engage modes.
2. By depressing the Brightness (“B”) and High Limit Set (“H”) buttons
simultaneously the unit’s mode of re-engagement is changed from
“Manual Engagement Mode” to “Auto Engagement Mode”. Both the
red and yellow LED’s flash once to notify the installer the unit is in “Auto
Engagement Mode”. In “Auto Engagement Mode” the P.T.O. re-engages
automatically once the engine’s R.P.M. reach the lower set point.
3. Depressing the “B” and “H” buttons simultaneously again switches the unit
from “Automatic Engagement Mode” back to “Manual Engagement Mode”.
Both the red and yellow LED’s flash twice to notify the installer the unit is
in “Manual Engagment Mode”.
Setting Procedure - Speed Limits
1. Start the engine and allow it to idle. The “On/Off” button will be illuminated
white to indicate the unit is turned Off. The P.T.O. should be disengaged.
2. Turn the system On by depressing the “On/Off” button. You must hold the
button down for 0.5 seconds for the unit to turn On. When turned On, the
“On/Off” button will turn from white to red, the P.T.O. will engage and the
red “P.T.O. Engaged” will illuminate.
3. Ramp up the vehicle’s R.P.M. to the R.P.M. the user desires the P.T.O. to
automatically disengage. Depress the “H” (High Limit) button on the
bottom of the unit using a small tool or pencil point. The yellow “Over
Speed” will illuminate, the P.T.O. will disengage, the red “P.T.O. Engaged”
will turn off.
4. Slowly let the vehicle’s R.P.M. fall to the lower R.P.M. setting where the
user desires the P.T.O. to be able to be re-engaged. Depress the “L” (Low
Limit) button on the bottom of the unit using a small tool or pencil point.
The yellow “Over Speed” will turn off and the “On/Off” button will be red
and flashing. Further lower the R.P.M. slightly. The “On/Off” button flashing
red indicates that the unit is ready to re-engage the P.T.O.
5. Depress the flashing “On/Off” button to re-engage the P.T.O. The P.T.O. will
engage and the red “P.T.O. Engaged” will illuminate.
6. If the unit is in the “AUTOMATIC Engagement Mode” the P.T.O. will be
engaged automatically when the “L” (Low Limit) Button is depressed.
Owner’s Manual
Electronic Overspeed Control
