11
Troubleshooting
Parts
Replacement
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
Probable Cause
Remedy
Pump will not turn
1) Low pump
Check thermocouple and control
temperature
loop for proper setting/operation.
Allow sufficient heat-up time.
2) Drive malfunction
Verify drive is powered. Check to
assure all alarm circuits are clear.
Check drive motor current and
speed settings. Check all drive
couplings.
3) Process
conditions changed
Check process conditions for
proper melt temperature, pres-
sures, viscosities and materials.
4) Entrained particle
Disassemble and clean pump;
replace any damaged parts.
5) Possible
internal damages
Disassemble and clean pump;
replace damaged parts.
Consult factory.
Excessive seal
assembly leakage
1) Worn lip seal
Replace lip seals.
2) Incorrect water flow
Monitor and adjust water flow
to provide correct sealing
temperature.
3) Clogged Rheoseal
Disassemble two-piece seal
channel
housing and inspect.
Reduced pump
efficiency
1) Worn gear(s)
Replace worn gear.
2) Worn bearings
Replace worn bearings.
3) Process conditions
Consult factory for clearance
changed
recommendations on new
process conditions.
