ZEP 440C-G, Руководство по обслуживанию

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19
Troubleshooting
Presence of metal
particles during oil
change
Failure of internal component. Remove and disassemble to find probable cause.
New pump. New pumps have machine fillings and debris
and should be drained and refilled per PUMP
SPECIFICATIONS.
Water leakage from
under head
Worn packing. Install new packing.
Cracked/scored plunger. Remove and replace plunger.
Failure of plunger retainer o-ring. Remove and replace plunger retainer o-ring.
Loud knocking noise in
pump
Pulley loose on crankshaft. Check key and tighten set screw.
Defective bearing. Remove and replace bearing.
Worn connecting rod, crankshaft,
or crosshead.
Remove and replace.
Frequent or premature
failure of the packing
Scored, damaged, or worn plunger. Remove and replace plungers.
Overpressure to inlet manifold. Reduce inlet pressure.
Abrasive material in the fluid being
pumped.
Install proper filtration on pump inlet pumping.
Excessive pressure and/or
temperature of fluid being pumped.
Check pressures and fluid inlet temperature. Be sure
they are within specified range.
Over pressure of pumps. Reduce pressure.
Running pump dry. Do not run pump without water.
Low Pressure Dirty or worn check valves. Clean/replace check valves.
Worn packing. Remove and replace packing.
Belt slipping. See BELT TENSION in MACHINE MAINTENANCE.
Improperly sized spray tip or
nozzle.
See MACHINE SPECIFICATIOSN for specified spray
tip or nozzle.
Inlet filter screen is clogged. Clean inlet filter screen.
Pitted valves. See VALVE SERVICE in PUMP MAINTENANCE.
Erratic pressure; pump
runs rough
Dirty or worn check valves. Clean/replace check valves.
Foreign particles in valve
assemblies.
High inlet water temperature. See temperature in PUMP SPECIFICATIONS.
Excessive vibration Dirty or worn check valves See “Dirty or worn check valves.”
Scored plungers Abrasive material in fluid being
pumped.
Install proper filtration on pump inlet plumbing.
Fitted plungers Cavitation. Decrease inlet water temperature and/or increase inlet
water pressure.