Control Adjustment Instructions - Parker CHELSEA Owner's Manual

Bulletin HY25-1650-M1/US
Installation Instructions

Control Adjustment Instructions

Selecting the Overspeed R.P.M.:
This is usually based on safety, noise control or fuel economy considerations.
The high limit set point should be set no greater than the maximum speed
allowed by the manufacturer of the driven equipment, and the engine, BUT
IN NO CASE GREATER THAN 3000 R.P.M.
Selecting the Reset R.P.M.:
The control is set to provide a reset, after an over-speed disengagement.
The automatic reset should be set above the engine fast idle speed, BUT NO
GREATER THAN 1000 R.P.M.
Safety Precautions and Preparations:
The control settings are to be made with the engine running – provide
adequate ventilation and exhaust elimination or make the adjustments
outdoors. Put the vehicle transmission in neutral, set the vehicle brakes and
chock the wheels.
Disengage the driven equipment.
Connect a tachometer to the engine, if there is not one in the vehicle.
Description of Re-Engagement Modes
1. Manual Engagement Mode- In this mode the user must manually depress
the On/Off button to re-engage the P.T.O. after an Overspeed condition.
NOTE: The unit is preset from the factory in this mode
2. Auto Engagement Mode- In this mode the unit automatically re-engages
the P.T.O. after an Overspeed condition and the lower set point has been
reached.
WARNING: When the Parker Chelsea Electronic Overspeed
Controller is set up in Auto Re-engagement Mode, the P.T.O. will
automatically engage when the engine RPM reaches the lower preset point
thus causing the driven equipment to become operable. The vehicle or
equipment operator must therefore make certain that other persons and
property are not in a position to be crushed, impacted, caused to fall or
otherwise injured when re-engagement occurs.
Owner's Manual
Electronic Overspeed Control
19
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA