Annual inspections
Perform these inspections one time each year:
•
Check the pump capacity.
•
Check the pump pressure.
•
Check the pump power.
If the pump performance does not satisfy your process requirements, and the process requirements
have not changed, then perform these steps:
1.
Disassemble the pump.
2.
Inspect it.
3.
Replace worn parts.
6.2 Bearing maintenance
For ATEX applications bearing replacement (all) is recommended after 25,000 hours of oper-
ation.
Bearing lubrication schedule
Table 8: Bearing lubrication schedule
Type of bearing First lubrication
Lubrication intervals
Oil-lubricated
bearings
Add oil before you install and start the
pump. Change the oil and oil filter after
200 hours for new bearings.
After the first 200 hours, change the oil filter every 2000
operating hours. If you do not change the oil filter as rec-
ommended, oil must be changed every 2000 hours.
6.3 Mechanical-seal maintenance
CAUTION:
Running a mechanical seal dry, even for a few seconds, can cause seal failure and physical
injury. Never operate the pump without liquid supplied to the mechanical seal.
Cartridge-type mechanical seals
Cartridge-type mechanical seals are commonly used. Cartridge seals are preset by the seal manufactur-
er and require no field settings. Cartridge seals installed by the user require disengagement of the hold-
ing clips prior to operation, allowing the seal to slide into place. If the seal has been installed in the pump
by ITT, these clips have already been disengaged.
Other mechanical seal types
For other types of mechanical seals, refer to the instructions provided by the seal manufacturer for instal-
lation and setting.
Before you start the pump
Check the seal and all flush piping.
6.2 Bearing maintenance
68
Model 3700i API610 / Type OH2 Installation, Operation, and Maintenance Manual
