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7.2 Six-Month Intervals
Every six months, perform the following maintenance
tasks:
i) If lubrication is required for the drive coupling,
apply oil or grease according to the instructions
provided by the coupling manufacturer. ii) Inspect the
pump bearings and apply lubrication if necessary. iii)
Follow the instructions from the motor manufacturer
to relubricate the drive motor bearings. iv) Ensure that
the orifice plug in the body, specifically the 3/8-inch
orifice of the lobe unloader, is not obstructed. To
check this:
1. Remove the pipe plug located in the fixed bearing
end head to access the orifice plug.
2. Examine the orifice plug for any obstructions or
blockages.
3. If you find any obstructions, carefully use a rod or
similar tool to remove them and clear the orifice.
4. In case the obstructions cannot be cleared with a
rod, use a wrench to safely remove the orifice plug.
5. Clear any obstructions from the plug if possible,
and then reinstall it securely.
6. Finally, reinstall the pipe plug back into the fixed
bearing end head, ensuring it is properly tightened.
NBE O & M Document No. NES/NBE/O&M
7.3 Twelve-Month Intervals
At twelve-month intervals, perform the following
maintenance tasks:
a. Examine the pump bearings and, if required, apply
lubrication following the provided guidelines in
section 5.4.
b. Stuffing box packing may be replaced as specified in
section 7.5.
7.4 Bearing Lubrication
All models of the NBE series are supplied with a re-
lubricating device. To track the lubrication intervals,
we recommend maintaining an inspection log. The
inspection log should include the following details:
• Date
• Machine type designation and serial number
• Grease type (manufacturer and designation)
• Grease quantity for each lubrication point
• Person responsible for lubrication
Lubrication intervals: The rolling bearings must be re-
lubricated at least:
• Either every 2000 operating hours
• Or twice a year (NBE3) or twice a half year (NBE4),
whichever occurs first.
Grease type: Refer to the list below in the Table 3 and
Figure2-4 for data on lubricating greases. The
following lubricating greases are suitable for
lubricating the rolling bearings.
Page 24 of 43
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