Carver Pump GH - DISASSEMBLY OF PUMP

I-120
GH Pump 120 – 16.02.EN
15
Table 4. Pumping Unit Troubleshooting
SYMPTOM
IMMEDIATE ACTION
PROBABLE CAUSE
CORRECTIVE ACTION
Pump does not deliver
rated capacity or rated
head.
1. Stop the pump, refer to
Section VIII, Paragraph
E.
1. Excessive system
pressure.
1. Check GPM and head
against design
conditions; Consult
local distributor or
Carver Pump
Company.
2. Speed to low, motor
speed incorrect, or line
voltage to low.
1. Correct motor speed.
2. Adjust belt tension.
3. Check electrical supply
and correct as
necessary.
3. Valves are not fully
open or plugged
discharge line.
1. Open valves and if
necessary, lock valves
open to prevent
accidental closure.
2. Inspect and clean
discharge.
4. Clogged impeller.
1. Disassemble pump and
clean impeller, if
necessary.
5. Reverse rotation.
1. Check power
connections to motor.
6. Motor running on two
phases only.
1. Replace defective fuse.
2. Check electrical cable
connections.
7. Excessive wear of
internal parts.
1. Disassemble pump,
inspect and replace
worn parts.
8. Liquid level in tank to
low.
1. Increase liquid level in
tank.
9. Vent in suction cover
plugged.
1. Clean vent.
Leakage at case joints.
1. Stop the pump, refer to
Section VIII, Paragraph
E.
1. Gaskets damaged.
1. Disassemble pump and
replace gaskets.
Bearings run hot.
1. Stop the pump, refer to
Section VIII, Paragraph
E.
1. Bearing setting
incorrect.
2. Worn bearings.
1. Correct bearing axial
clearance.
1. Replace bearings.