Parts Replacement; Troubleshooting - Zenith Pumps Installation And Maintenance Manual

Parts
Replacement

Troubleshooting

When ordering replacement parts, please be sure to include the following information:
1) Pump model number
2) Part number (12-digit) and description
3) Quantity
4) Shipping instructions
Order parts from your local Zenith representative or direct from Zenith.
Trouble
Pump will not turn
Excessive seal
assembly leakage
Reduced pump
efficiency
Probable Cause
1) Low pump
temperature
2) Drive malfunction
3) Process
conditions changed
4) Entrained particle
5) Possible
internal damages
1) Worn lip seal
2) Incorrect water flow
3) Clogged Rheoseal
channel
1) Worn gear(s)
2) Worn bearings
3) Process conditions
changed
Remedy
Check thermocouple and control
loop for proper setting/operation.
Allow sufficient heat-up time.
Verify drive is powered. Check to
assure all alarm circuits are clear.
Check drive motor current and
speed settings. Check all drive
couplings.
Check process conditions for
proper melt temperature, pres-
sures, viscosities and materials.
Disassemble and clean pump;
replace any damaged parts.
Disassemble and clean pump;
replace damaged parts.
Consult factory.
Replace lip seals.
Monitor and adjust water flow
to provide correct sealing
temperature.
Disassemble two-piece seal
housing and inspect.
Replace worn gear.
Replace worn bearings.
Consult factory for clearance
recommendations on new
process conditions.
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