31
HYDRAULIC DRIVE SYSTEM
Follow the recommended procedure in the indicated order to solve the problem and avoid
unnecessary repairs. Make sure all Switches are in the correct position and Indicator Lights ON
before determining the existence of a fault.
WARNING! Before correcting any kind of defect, make sure
the Main Power Switch is OFF and the incoming power is
locked OFF. NEVER access the inside of the Control Panel
with the Proportioner power supply ON. The Hydraulic Unit is
a component that works under pressure. Do not open any
connection or carry out maintenance on components subject
to pressure until all pressure has been bled to zero.
CAUTION! Do not attempt to reset the Motor Contactor more than
twice. Failure of the Motor Contactor safety mechanism will occur and
the Contactor will become inoperable and/or the Motor will be
damaged. The cause of the problem must be determined and
corrected.
PROBLEM:
Motor does not run and Hydraulic Pump does not develop pressure.
SOLUTIONS:
1. The Electric Motor is protected from excessive current by
an Overload Safety Switch. After allowing the Motor to
cool, open the Control Panel and reset Motor Contactor
Safety.
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