Goulds Pumps 3700 - IOM - Manual (Page 38)

Commissioning, Startup, Operation, and Shutdown
You must follow these precautions before you start the pump:
• Flush and clean the system thoroughly to remove dirt or debris in the pipe system in order
to prevent premature failure at initial startup.
• Bring variable-speed drivers to the rated speed as quickly as possible.
• Run a new or rebuilt pump at a speed that provides enough flow to flush and cool the
close-running surfaces of the stuffing-box bushing.
• If temperatures of the pumped fluid will exceed 200°F (93°C), then warm up the pump prior
to operation. Circulate a small amount of fluid through the pump until the casing
temperature is within 100°F (38°C) of the fluid temperature. Accomplish this by flowing
fluid from pump inlet to discharge drain (optionally, the casing vent can be included in
warm-up circuit but not required). Soak for (2) hours at process fluid temperature.
At initial startup, do not adjust the variable-speed drivers or check for speed governor or over-
speed trip settings while the variable-speed driver is coupled to the pump. If the settings have
not been verified, then uncouple the unit and refer to instructions supplied by the driver
manufacturer.
Remove the coupling guard
1. Remove the nut, bolt, and washers from the slotted hole in the center of the coupling guard.
2. Slide the driver half of the coupling guard toward the pump.
3. Remove the nut, bolt, and washers from the driver half of the coupling guard.
4. Remove the driver-side end plate.
5. Remove the driver half of the coupling guard:
a) Slightly spread the bottom apart.
b) Lift upwards.
6. Remove the remaining nut, bolt, and washers from the pump half of the coupling guard.
It is not necessary to remove the end plate from the pump side of the bearing housing. You
can access the bearing-housing tap bolts without removing this end plate if maintenance of
internal pump parts is necessary.
7. Remove the pump half of the coupling guard:
a) Slightly spread the bottom apart.
b) Lift upwards.
1. Annular groove
2. Pump-side end plate
3. Driver
4. Pump half of the coupling guard
36 Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Manual