Throughout this section on bearing lubrication, different pumpage temperatures are listed. If the
equipment is ATEX certified and the listed temperature exceeds the applicable value shown in the table
under ATEX identification, then that temperature is not valid. Should this situation occur, please consult
with your ITT/Goulds representative.
For ATEX applications bearing replacement (all) is recommended after 50,000 hours of operation.
6.1.3.1 Oil Lubricated Bearings
1.
Remove the bearing housing breather (113A) and add oil until oil level is at the center of the sight
glass.
2.
If the unit has an external oil lube system, fill the bearing housing and the reservoir to satisfy the
system requirements.
3.
Replace the breather.
Refer to Oil Volume table for required oil volume.
Table 7: Axial Flow Pump Approximate Oil Volume
Pump Size
Quarts
Litres
42" / 1200mm / 54"
74
70.5
60" / 66"
62
59
Approximate values only. Always fill using sight glass to verify level. Oil level should be at the center
of the sight glass. See comments in this section.
Bearings must be lubricated properly in order to prevent excess heat generation, sparks and
premature failure.
4.
Run the pump for 1 minute to fill the oil galleys and in and around each bearing. Check the sight
glass and add oil accordingly. Monitor the oil level indicator for the first 24 hours of operation and
maintain fill level.
6.1.3.2 Acceptable oil for lubricating bearings
A good SAE#30 or #40 is usually satisfactory. Consult a reputable supplier for acceptable substitutes for
the oils mentioned. The viscosity of the oil should be 150 SSU at the operating temperature to prevent
accelerated bearing wear 66°C | 150°F is the maximum temperature at which a typical 30 wt. oil will sup-
ply the required viscosity.
A good SAE#30 or #40 is usually satisfactory. Consult a reputable supplier for acceptable substitutes for
the oils mentioned. The viscosity of the oil should be 150 SSU at the operating temperature to prevent
accelerated bearing wear 66°C | 150°F is the maximum temperature at which a typical 30 wt. oil will sup-
ply the required viscosity.
Operating temperature
Oil requirement
below 66°C | 150°F
SAE 30
66-71°C | 150-160°F
SAE 40
71-82°C | 160-180°F
SAE 50
An oil with a higher viscosity than required will increase the bearing operating temperature because of
the extra viscous drag, but never to the point where the viscosity becomes lower than required from the
increased heat generation. It is therefore better for the bearings to have an oil that is too heavy rather
than too light.
Change the oil after the first 200 hours of operation. For normal operating conditions, change the oil at
least four (4) times a year. If the bearing assembly is exposed to dirty or moist conditions, the oil should
be changed more often.
6.1 Maintenance
Model AF (42"/1200mm/54"/60"/66") LM/LMR Bearings Installation, Operation, and Maintenance Manual
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