17
Instruction Manual
Pump mechanism will not operate
• Incorrect or inoperative electrical circuit to motor. Check and
repair / reset power supply, fuses, thermal overload protectors,
wiring.
• Incorrect or inoperative electrical circuit to motor. Correct controlling
devices such as liquid level, speed control, etc.
• Discharge line blocked. Remove blockage (open valve,thaw
discharge lines).
• Discharge line blocked. Check maximum pressure rating of pump
from data plate.
Pump does not deliver rated flow
• Fluid vapor in liquid end. Eliminate suction line leaks, tighten line
fittings, increase available suction head by increasing suction line
size; decrease suction line length; heat fluid to decrease its viscosity
or cool fluid farther away from its boiling point.
• Suction or discharge check valves fouled. Clean per liquid end
maintenance instructions or replace.
• Capacity adjustment improperly set or pump not operating at proper
speed. Adjust capacity and insure electrical requirements of motor
are available .
• Packing leaking excessively. Adjust or replace per liquid end
maintenance instructions.
Motor and pump body hot
• Normal operating temperature of both motor and pump body is
frequently uncomfortable to the touch. However, neither should
exceed 200°F (93°C).
• Power supply does not match electrical requirement of motor.
Insure proper matching of power supply and motor.
• Pump being operated at greater than rated performance. Reduce
pressure or stroke speed. If this is not practical, contact factory.
• Pump improperly lubricated. Drain oil and refill with proper amount
of recommended lubricant.
Noisy operation
• Check valves may emit a clicking sound in normal operation.
• In pump housing- Insure proper lubrication, replace worn bearings,
clevis pins, or gears.
Pump is not at zero stroke when
adjustment reads zero
• Stroke adjustment knob is set incorrectly (a normal pump may not
be able to obtain absolute zero stroke at any setting). Minimum
obtainable stroke should not exceed 0.015” (0.381 mm). Adjust
pump to minimum stroke obtainable, loosen knob set- screw, reset
to zero indication, and retighten knob wet- screw. Adjust pump to
minimum stroke obtainable, loosen knob setscrew reset to zero
indication, re- tighten knob setscrew.
Leaking oil
• Worn crosshead oil seal. Replace seal, inspect crosshead for
scoring, replace if necessary.
• Worm shaft seals. Clean and inspect oil seal bushings, replace
seals, bushings, and O-rings as necessary.
Stroke knob “creeps” OFF setting
• Loose friction plug. Tighten friction plug setscrew, replace plug if
necessary.
SECTION 6 - TROUBLESHOOTING
Summary of Contents for MILROYAL D
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