MAINTENANCE
Reassembly
7
Pump Check Valve Disassembly
1. Unbolt and remove the check valve from the volute.
2. Loosen the nut and set aside.
3. Pull the bolt and set aside the flat washer, top weight, flapper, and bottom weight.
NOTE:
The top weight is heavier, and sits on the pump side of the check valve.
4. Inspect disassembled components. Replace the worn parts with new during reassembly.
Reassembly
Pump Check Valve Reassembly
1. Insert the flapper bolt through bottom weight and flapper.
2. Add the top weight and flat washer to the bolt.
3. Screw on the nut.
• Torque to 65 in-lbs.
4. Bolt the check valve assembly to the volute.
• Torque to 20 ft-lbs.
Pump Shaft Assembly
1. Slide water slinger onto motor shaft.
2. Install the shaft sleeve onto motor shaft.
• Apply Loctite 7649 primer to motor shaft and inside of shaft sleeve.
• Apply a ring of green Loctite 648 retaining compound around the inside leading edge of the
shaft sleeve and a line along the motor shaft.
• Rotate the sleeve at least two times before fully seating the sleeve against shaft shoulder.
• Wipe off excess lubricant.
• Let stand 3 minutes.
3. Insert a new stationary portion of the mechanical seal into the motor adapter.
• Ensure the bracket socket is clean before installation.
• Lubricate seal and socket with P-80 lubricant to ease installation.
• Do not contaminate the seal face.
4. Bolt the motor adapter to the motor.
• Use Blue Loctite 243 on bolts.
• Torque to 20 ft-lbs.
IMPORTANT:
Be sure not to damage the stationary part of the mechanical seal.
5. Install the rotating portion of the mechanical seal onto the shaft sleeve so that the rotating ring sits
against the stationary ceramic seal face.
• Lubricate seal with P-80 lubricant to ease installation.
• Do not contaminate the seal face.
NOTE:
If there is a retainer on the seal spring, discard it.
6. Install the shaft key and impeller
• Slide the shaft key onto the shaft.
• Install the impeller with its washer and bolt onto the shaft.
• Use Red Loctite 271 on the impeller bolt.
• Torque the impeller bolt to 20 ft-lbs.
7. Ensure the impeller eye is perpendicular to the adapter flange.
8. Ensure the impeller spins freely.
