Goulds Pumps AF (Axial Flow) (6"-36) MXR Bearings" - Manual (Page 54)

52 AF (6-36) IOM
COOLING COIL (OPTIONAL) / SIGHT GLASS
/ BREATHER AND PLUGS
Loosen and remove the screws (370F) that secure the
cover plate (113B) to the bearing housing (134C) and
discard the gasket. (360E). Remove the cover plate and
coil. Disconnect the connectors (972G and 972H) from
the cover plate and remove the cooling coil (984A). see
Fig. 49.
Finally, if necessary remove the breather (113A), pipe
plugs (408D, 408, 408A, 251C) and the sight glass
(319).
INSPECTIONS
Before re-assembly all AF wear parts should be
inspected using the following methods to insure the
pump will perform properly. Any part not meeting the
required criteria should be replaced.
NOTE: Clean parts in solvent to remove oil, or grease
or dirt. Protect machined surfaces against damage
during cleaning.
ELBOW / CASING / LINER (OPTIONAL)
The elbow and or casing (315A or 100) and liner
(103A) should be inspected for excessive wear or
pitting in the impeller and gasket areas. They should
be repaired or replaced if wear or corrosion exceeds
the following criteria, see Fig. 50.
1. Localized wear or grooving greater than 1/8 in.
(3.2mm) deep.
2. Pitting greater than 1/8 in. (3.2mm) deep.
3. Inspect case gasket seat surface for irregularities.
IMPELLER
1. Inspect impeller vanes for damage (101), Fig. 51.
Check the vane O.D. for erosion. Check the vane
surfaces, replace if grooved, worn or eroded
deeper than 3/16 in. (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
replace if grooved or worn deeper than 3/16 in.
(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.
Fig. 50
3
1 2
3
1 2
3
1 2
Fig. 49
408 134C
972H
370F
361 360E
408A
113A
319
408D
984A
972G
251C