Xylem G&L A-C 8300 Series Instruction Manual page 37

1. Press the stationary mechanical seal seat into the gland plate until it bottoms out
against the bore. Lightly lubricate the bore to ease assembly. (See photo below)
2. Press a new lip seal into the gland plate. Before installing the lip seal, lubricate the lip-
seal with lightweight oil.
NOTE: Lip seals should sit against the machined shoulder in the gland plate. The lip
seal should face away from the mechanical seal seat (see photo below)
3. Lubricate and roll the O-ring into the grove in the gland plate.
IMPORTANT: Steps 4 and 5 must be completed within 10 to 12 minutes to assure
proper placement of the mechanical seals.
4. Lightly coat the outboard end of the pump shaft with P-80 Rubber Lubricant Emulsion,
vegetable oil, or equal and slide the mechanical seal head onto the shaft. Do not
compress the seal spring at this time.
5. Slide the gland plate, over the shaft, being careful that the head and the seat of the
mechanical seal do not get damaged. Then press the gland plate with the O-ring into
the stuffing box and tighten the socket-head capscrews.
NOTE: Because of the compression of the O-ring, it may be difficult to press the O-ring
into the stuffing box. Use longer socket-head capscrews to start the gland plate into
the stuffing box. Draw-up the bolts evenly until the gland plate is secure in the stuffing
box. To prevent the mechanical seal spring from pushing the gland plate back out of
the stuffing box. Remove one long socket-head capscrew at a time and replace with a
regular socket-head screw.
6. Heat the ball bearings using dry heat or 10% - 15% soluble oil and water, or an
induction heater.
G&L Pumps Series A-C 8300 Base Mounted Centrifugal Pump INSTRUCTION MANUAL
CAUTION:
Use a flashlight and make sure the mechanical seal spring is searing
properly into the spring holder and around the bellows of the
mechanical seal before continuing.
6 Maintenance
35