12
PN524 (08-01-20)
PREVENTIVE MAINTENANCE
To avoid major repairs, make the checks listed below every 4 to 6 months.
Test
1. Measure and record the standing
water level (from top of well casing).
2. Measure electrical resistance
between motor leads and well
casing with motor
cold.
3. Check pump flow capacity (gallons
per minute).
4. Check pump discharge pressure
(PSI) at operating conditions.
5. Check drawdown level (in feet) from
standing water level.
6. Measure voltage across motor
leadsn while pump is operating.
Result Should Be
1. Reference number.
2. See motor manual.
3. At least 90% of readings at
installation.
4. At least 90% of readings at
installation.
5. High enough so that pump does not
break suction.
6. Within ±10% of rated voltage.
Possible Indications
1. To aid in monitoring pump
performance.
2. See motor manual.
3. Lower readings may indicate pump
needs repair.
4. Lower reading indicates pump
wear, increased friction losses, or
change in standing water level in
well.
5. Cavitation can damage pump;
increased drawdown may indicate
reduced well flow.
6. If voltage is more than 110% or less
than 90% of rated voltage, consult
power company.
SERVICE
15. Put the Rotor Compression Washer (Key No. 5) on the
Discharge Spacer and lock it with the Rotor Compression
Capscrew (Key No. 4).
NOTE:
Use Loctite Threadlocker
®
on the capscrew threads.
16. Slide the Top Bowl over the shaft and seat it.
17. Install the Check Valve Poppet on top of the last Bowl.
18. Install the Discharge (Key No. 1) on the Top Bowl and seat
the assembly by gently tapping it with a rubber mallet. Be
sure that the strap slots in the discharge are clean.
19. Hook the four Straps (Key No. 21) into the Discharge and
loosely fasten them to the Suction Bracket Assembly with
Lock Washers (Key No. 17), Hex Head Bolts (Key No. 18), and
Strap Nuts (Key No. 16).
20. Tighten the four Straps evenly to 45 ft.-lbs. torque. Be sure
that the Straps seat completely in the discharge.
21. Check the axial clearance of the pump shaft (2.5 to
3 mm. or 3/32 to 1/8”).
22. Check for free rotation of the pump stack.
23. Install the Suction Strainer (Key No. 24).
24. Install the Cable Guard Clamps and Cable Guard (Key Nos. 22
and 23) on the pump.
25. Remove the pump from the fixture, install the Coupling
Screen (Key No. 26), and mount the pump on the motor.
The pump is ready for installation.