PMC PH-2 - Metering Pump Line Troubleshooting

POLYURETHANE
MACHINERY
CORPORATION
PH-2 SERVICE MANUAL
12. TROUBLESHOOTING
12.2 HYDRAULIC DRIVE SYSTEM
Frequent Hydraulic Drive System Problems
Hydraulic Pump does not develop pressure and the electric motor is not
running.
Page 36
Hydraulic Pump does not develop pressure. Page 37
Low or zero hydraulic pressure with unusual Hydraulic Pump noises. Page 37
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! Only qualified personnel should perform trou-
bleshooting; unqualified personnel may cause damage to the
unit, personnel, or property and put the operator at risk.
The Heaters are components that reach high temperatures;
you must wait until they cool before handling.
CAUTION! Excessive force opening or closing the Manual
Valves may result in damage to the Manual Valves and/or
Coupling Block.
• Problem: Hydraulic Pump does not develop pressure and the electric motor is not
running.
Solutions:
Motor Contactor Safety or Motor Breaker - 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.
REVISION 1.2 36