Goulds Pumps 3171 - IOM - Manual (Page 46)

Shaft surface check
Check the shaft surface for damage, especially in areas indicated by the arrows in the following figure.
Replace the shaft if it is damaged beyond reasonable repair.
Bearings inspection
Condition of bearings
Do not reuse bearings. The condition of the bearings provides useful information on operating conditions
in the bearing frame.
Checklist
Perform these checks when you inspect the bearings:
• Inspect the bearings for contamination and damage.
• Note any lubricant condition and residue.
• Inspect the ball bearings to see if they are loose, rough, or noisy when you rotate them.
• Investigate any bearing damage to determine the cause. If the cause is not normal wear, correct the
issue before you return the pump to service.
Bearing fits and tolerances
This table references the bearing fits and tolerances according to ISO 286 (ANSI/ABMA Standard 7) in
inches (millimeters).
Table 3: Steady bearing tolerances
Descript
ion
Bearing ID (pressed into
place)
Housing bore Running clearance (1/2
diametrical clearance)
S/ST M/MT L S/ST M/MT L S/ST M/MT L
Carbon 1.132–
1.134
(28.753–
28.804)
1.633–
1.635
(41.478–
41.529)
2.258–
2.260
(57.353–
57.404)
1.621–
1.623
(41.173–
41.224)
2.121–
2.123
(53.873–
53.924)
2.994–
2.996
(76.048–
76.098)
0.0055–
0.0035
(0.140–
0.089)
0.006–
0.004
(0.152–
0.102)
0.0065–
0.004
(0.165–
0.102)
Bronze 1.129–
1.131
(28.677–
28.727)
1.629–
1.631
41.377–
41.427
2.256–
2.258
(57.302–
57.353)
1.621–
1.623
(41.173–
41.224)
2.121–
2.123
(53.873–
53.924)
2.994–
2.996
(76.048–
76.098)
0.004–
0.002
(0.102–
1.051)
0.004–
0.002
(0.102–
1.051)
0.0055–
0.003
(0.140–
0.076)
Fluted
elastomer
1.126–
1.130
(28.600–
28.702)
1.627–
1.632
(41.326–
41.453)
2.253–
2.257
(57.226–
57.328)
1.621–
1.623
(41.173–
41.224)
2.121–
2.123
(53.873–
53.924)
2.994–
2.996
(76.048–
76.098)
0.0035–
0.0005
(0.089–
0.013)
0.0045–
0.001
(0.114–
0.025)
0.005–
0.004
(0.127–
0.102)
Rulon 1.132–
1.134
(28.753–
28.804)
1.633–
1.635
(41.478–
41.529)
2.258–
2.260
(57.353–
57.404)
- - - 0.0055–
0.0035
(0.140–
0.089)
0.006–
0.004
(0.152–
0.102)
0.0065–
0.004
(0.165–
0.102)
Casing
collar
1.183–
1.190
(30.048–
30.226)
1.678–
1.685
(42.621–
42.799)
2.299–
2.306
(58.395–
58.472)
1.811–
1.816
(45.999–
46.126)
2.243–
2.245
(56.972–
57.023)
3.243–
3.245
(82.372–
82.423)
0.0335–
0.029
(0.851–
0.737)
0.031–
0.0265
(0.787–
0.673)
0.029–
0.0245
(0.737–
0.622)
Maintenance (Continued)
44 Model 3171 Installation, Operation, and Maintenance Manual