PMC PH Series - Page 31

PH-20/PHX-20 Manual
31
Motor Contactor
PROBLEM
Hydraulic Pump does not develop pressure and the electric motor is not running.
SOLUTIONS
1. 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.
PROBLEM
Hydraulic Pump does not develop pressure
SOLUTIONS
1. Hydraulic Power Package
NOTE! Hydraulic pressure is not generated if the Motor Power Switch [X, page
12] is OFF or the Pump Switch [Y, page 12] is in the OFF position.
With the Pump Switch in the NORMAL position, the failure of the Hydraulic Pump to
develop pressure is loss of pump suction (prime). To ensure positive prime, check the
following:
a) Motor rotation (page 16).
b) Hydraulic Reservoir is filled to the correct level (page15).
c) Hydraulic Pump Case is filled with the proper hydraulic fluid (page 47).
d) Loose Inlet Plumbing: Check that all inlet plumbing to Hydraulic Pump is tight
ensuring no air leakage into the hydraulic system.