Maintenance
22
INOXPA S.A.U.
· 01.610.30.11EN · (0) 2021/05
8.7.5. Gland packing
Disassembly
•
First follow the disassembly procedure described in chapter
8.7.1. Stator, rotor and connecting rod
•
Remove the packing from the packing box (36) with the gland (37) from the front side.
•
Once the packing has been removed, remove the gland (37) by loosening the nuts (57).
•
Proceed to replace the gland packing rings (08C).
Assembly
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Before introducing the new gland packing, check the condition of the surface of the driving shaft (05) and
the packing box (36). The shaft should have a polished surface finishing.
•
Cut the rings to the required length with a 45º angle, as shown in Figure 01.610.32.0013, Check that the
cuts match on the shaft.
•
Gently open the rings, as shown in figure 01.610.32.0014, to allow the passage of the shaft, and place
them each in turn separately. First, insert the junction and then push the rings to the end.
•
The rings (08C) must be in contact with each other, and the cuts of each ring must be arranged against
each other forming a 120º angle.
•
Insert the gland packing (37) and fit the pins (55A) and nuts (57) avoiding fastening them excessively.
•
Mount this assembly to the shaft (05).
•
Turn the drive shaft (05) from time to time to facilitate the settlement of the rings.
•
Fasten the nuts (57) manually and evenly and make sure that the shaft rotates freely. Now follow the
assembly procedure described in chapter
8.7.1. Stator, rotor and connecting rod
•
Let the pump operate with constant leaks for about 10 minutes, then fasten the gland (37) using the nuts
(57) until the leaks are reduced to an acceptable level (15 to 20 drops/minute approximately). A dripping
leak is essential for the normal operation of the gland packing in order to avoid the overheating of the
screws.
•
When the packing has become fully compressed after successive adjustments, replace the full contents of
the box (never replace the packing only partially). Always use good-quality packing.
8.7.6. Bearing support
Disassembly
•
First follow the disassembly procedure described in chapters
8.7.1. Stator, rotor and connecting rod
•
Remove the bearings cover (12) using the allen screws (51).
•
Remove the shaft (05) with the bearings still mounted on the back side of the support (06) by gently
knocking with a plastic hammer on the other end of the shaft (05).
•
If the seal (88) has come out along with the shaft (05), pull it out.
•
Remove the elastic ring (66) and the stop washer (31A).
•
Remove the ball bearing (70A), the spacer bushing (17) and the inner ring of the roller bearing (70).
•
Finally, remove the outer ring together with the bearing rollers (70) which will have remained housed into
the support of the bearing (06).
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