500
502
Figure 26: Coupling guard reassembly
17. Check impeller alignment and re-align if necessary according to instructions impeller alignment.
18. Fill pump with proper lubricant. Refer to preventative maintenance for requirements.
19. Connect all auxiliary piping and tubing
20. Fill system piping so pump impeller is submerged, flush the pump if necessary.
21. Open all valves controlling flow “to and from” the pump.
22. Unlock driver power and jog the pump motor to be sure the pump rotates with no binding or rubs. If
all is proper, continue with pump start-up.
NOTICE:
6.3.4 Inspections
Impeller
1.
Inspect impeller vanes for damage (101). Check the vane O.D. for erosion. Check the vane sur-
faces, replace if grooved, worn, or eroded deeper than 3/16" (5.0 mm.) Excessive impeller wear
may cause a reduction in performance.
2.
Inspect the leading and trailing edges of the vanes for pitting, erosion or corrosion damage re-
place if grooved, or worn deeper than 3/16" (5.0 mm.)
3.
Inspect the root (vane attach point at hub) of each vane for cracks. Impeller vane failure can
cause unbalance in the rotating assembly that will lead to catastrophic failure of the pump.
4.
Inspect the keyway and stepped bores for signs of pitting, wear or corrosion damage.
5.
Check the O-ring groove and bolt holes for signs of pitting or corrosion.
Shaft
1.
Check the shaft (122) for straightness, wear, corrosion, and radial run-out. Maximum run-out for
non-contact portions of the shaft is .002" (.05 mm) max.
2.
Bearing seats and seal areas must be smooth and free of scratches and grooves. Shaft hole
threads must be in good condition. Replace if necessary.
Shaft Sleeve
1.
The shaft sleeve (126) should be replaced if badly grooved or worn. Localized wear or grooving
greater than 3/32" (2.4 mm) deep is cause for replacement, see Fig. 50.
6.3 Reassembly
Model AF (42"/1200mm/54"/60"/66") LM/LMR Bearings Installation, Operation, and Maintenance Manual
59
