Goulds Pumps 3796 i-FRAME - IOM - Manual (Page 90)

Bearing fits and tolerances
This table references the bearing fits and tolerances according to the ABEC I standard.
Table 13: Bearing fits and tolerances table
STi inches
(millimeters)
MTi inches
(millimeters)
LTi inches
(millimeters)
XLT-i, i-17 inches
(millimeters)
Shaft OD
Inboard 1.3785 (35.014)
1.3781 (35.004) 1.7722 (45.014)
1.7718 (45.004) 2.1660 (55.016)
2.1655 (55.004) 2.5597 (65.016)
2.5592 (65.004)
Clearance 0.0010 (0.025) tight
0.0001 (0.003) tight 0.0010 (0.025) tight
0.0001 (0.003) tight 0.0012 (0.030) tight
0.0001 (0.003) tight 0.0012 (0.030) tight
0.0001 (0.003) tight
Bearing ID
Inboard 1.3780 (35.001)
1.3775 (34.989) 1.7717 (45.001)
1.7712 (44.988) 2.1654 (55.001)
2.1648 (54.986) 2.5591 (65.001)
2.5585 (64.986)
Frame ID
Inboard 2.8346 (72.000)
2.8353 (72.017) 3.9370 (100.000)
3.9379 (100.023) 4.7244 (120.000)
4.7253 (120.023) 5.5118 (140.000)
5.5128 (140.025)
Clearance 0.0012 (0.031) loose
0.0000 (0.000) loose 0.0015 (0.038) loose
0.0000 (0.000) loose 0.0015 (0.038) loose
0.0000 (0.000) loose 0.0017 (0.043) loose
0.0000 (0.000) loose
Bearing OD
Inboard 2.8346 (72.000)
2.8341 (71.986) 3.9370 (100.000)
3.9364 (99.985) 4.7244 (120.000)
4.7238 (119.985) 5.5118 (140.000)
5.5111 (139.982)
Shaft OD
Outboard 1.1815 (30.010)
1.1812 (30.002) 1.7722 (45.014)
1.7718 (45.004) 1.9690 (50.013)
1.9686 (50.003) 2.5597 (65.016)
2.5592 (65.004)
Clearance 0.0008 (0.020) tight
0.0001 (0.003) tight 0.0010 (0.025) tight
0.0001 (0.003) tight 0.0010 (0.025) tight
0.0001 (0.003) tight 0.0012 (0.030) tight
0.0001 (0.003) tight
Bearing OD
Outboard 1.1811 (30.000)
1.1807 (29.990) 1.7717 (45.001)
1.7712 (44.988) 1.9685 (50.000)
1.9680 (49.987) 2.5591 (65.001)
2.5585 (64.986)
Housing OD
Outboard 2.8346 (72.000)
2.8353 (72.017) 3.9370 (100.000)
3.9379 (100.022) 4.3307 (110.000)
4.3316 (110.023) 5.5118 (140.000)
5.5128 (140.025)
Clearance 0.0012 (0.031) loose
0.0000 (0.000) loose 0.0015 (0.038) loose
0.0000 (0.000) loose 0.0015 (0.038) loose
0.0000 (0.000) loose 0.0017 (0.043) loose
0.0000 (0.000) loose
Bearing OD
Outboard 2.8346 (72.000)
2.8341 (71.986) 3.9370 (100.000)
3.9364 (99.985) 4.3307 (110.000)
4.3301 (109.985) 5.5118 (140.000)
5.5111 (139.982)
Reassembly
Assemble the rotating element and the bearing frame ( STi and MTi )
CAUTION:
Wear insulated gloves when you use a bearing heater. Bearings get hot and can cause physical injury.
NOTICE: Make sure that the pipe threads are clean, and that you apply thread sealant to the plugs and
fittings. Failure to do so may result in equipment damage or decreased performance.
NOTICE: Use an induction heater that heats as well as demagnetizes the bearings when you install
bearings. Failure to do so may result in decreased performance.
1. Prepare the bearing frame (228) as follows (see the illustration):
a) Install the oil-fill plug (113A).
b) Install the oil-drain plug (408A).
c) Install the sight glass (319).
Maintenance (Continued)
88 Model 3796 i-FRAME Installation, Operation, and Maintenance Manual