Goulds Pumps 3700 - IOM - Manual (Page 66)

Maintenance
9. Remove and discard the mechanical seal O-ring or gland gasket.
You will replace this with a new O-ring or gasket during reassembly.
Remove the optional water-jacket cover
CAUTION:
• The seal-chamber cover must be adequately supported so that it cannot fall.
• You must vent all air from the water jacket. If all of the air is not vented, it can cause the water jacket
cover to be propelled from its fit in the seal-chamber cover.
• Do not exceed 7.0 kg/cm 2 (100 psig) pressure in the water jacket.
1. Suspend the seal-chamber cover from the lifting sling, or firmly support the seal-chamber
cover in a vertical position such that one water-jacket connection is on the top and the other
is on the bottom.
2. Slowly replace all the air with water until all air is vented and only water comes out of the
top connection.
3. Seal the top connection with a plug or other suitable means.
4. Slowly increase water pressure on the inlet (bottom) connection to force the water-jacket
cover from its fit in the seal-chamber cover.
Be prepared to catch the water-jacket cover.
5. Remove and discard the outer and inner water-jacket cover O-rings from the grooves in the
water-jacket cover.
You will replace these with new O-rings during reassembly.
Disassemble the power end
This procedure explains how to disassemble a standard ring-oil or optional purge-oil mist-
lubricated power end and includes information for the disassembly of these optional features:
• Pure oil-mist-lubricated power end
• Radial-heat-flinger end
• Air-cooling package
• Water-cooling package
CAUTION:
Do not remove bearings from the shaft unless you need to replace them.
The optional pure-oil mist-lubricated power ends are disassembled in the same manner as ring
oil-lubricated power ends. Oil rings are not furnished with pure-oil-mist lubrication. Disregard
any references to those parts.
1. Does your power end have an optional air-cooling package?
• If no: Go to step 2.
• If yes:
a) Loosen the radial-heat-flinger set screw.
b) Loosen the thrust-fan set screw.
The thrust fan for the SA and MA pumps sits on the coupling diameter.
c) Slide the thrust fan off the shaft.
d) Loosen and remove the thrust-bearing end cover and bearing-frame screws.
64 Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Manual