Goulds Pumps 3180-86 - IOM - Manual (Page 113)

Bearing fits and tolerances
Group Bearing Maximum bearing frame bores
in inches (millimeters)
Maximum bearing housing
bore in inches (millimeters)
S Thrust 6.3002 (160.02) 4.7253 (120.02)
Radial 4.7253 (120.02)
M Thrust 6.3002 (160.02) 5.1191 (130.03)
Radial 5.1191 (130.03)
L Thrust 7.8752 (200.03) 6.3002 (160.02)
Radial 5.9065 (150.03)
XL Thrust 9.4500 (240.03) 7.4815 (190.03)
Radial 7.0876 (180.03)
XL1 Thrust 13.6253 (346.085) 11.0248 (280.032)
Radial 11.0249 (280.032) N/A
XL2-S and
XL2
Thrust 16.5779 (421.082) 12.5998 (320.036)
Radial 12.5998 (320.036) N/A
Radial ring clearances for enclosed impellers
Reasons for performing impeller clearance checks
Enclosed impellers require a close radial clearance between the impeller and case wear rings in order for
the pump to operate at maximum efficiency. Over time, pump performance may degrade due to normal
wear in this area. If an individual part is out of specification, it should be replaced.
Radial ring clearances
Size Impeller Ring OD - in.
(mm)
Casing Ring ID - in.
(mm)
Clearance - in. (mm)
3 x 6-14 4.4811 (164.62)
4.4771 (164.52) 6.5111 (165.38)
6.5151 (165.48) 0.030 (0.76)
0.038 (0.97)
4 x 6-14 7.3078 (185.62)
7.3038 (185.52) 7.3378 (186.38)
7.3418 (186.48) 0.030 (0.76)
0.038 (0.97)
4 x 6-16 7.7015 (195.62)
7.6975 (195.52) 7.7315 (196.38)
7.7355 (196.48) 0.030 (0.76)
0.038 (0.97)
6 x 8-14 8.2187 (208.75)
8.2147 (208.65) 8.2487 (209.52)
8.2527 (209.62) 0.030 (0.76)
0.038 (0.97)
8 x 8-14 9.2360 (234.59)
9.2320 (234.49) 9.2660 (235.36)
9.2700 (235.46) 0.030 (0.76)
0.038 (0.97)
10 x 10-14 10.5062 (266.86)
10.5022 (266.76) 10.5362 (267.62)
10.5402 (267.72) 0.030 (0.76)
0.038 (0.97)
6 x 8-16 8.2187 (208.75)
8.2147 (208.65) 8.2487 (209.52)
8.2527 (209.62) 0.030 (0.76)
0.038 (0.97)
4 x 6-19 8.2187 (208.75)
8.2147 (208.65) 8.2487 (209.52)
8.2527 (209.62) 0.030 (0.76)
0.038 (0.97)
8 x 10-16 10.7308 (272.56)
10.7268 (272.46) 10.7653 (273.44)
10.7693 (272.54) 0.0345 (0.88)
0.0425 (1.08)
10 x 12-16 12.3843 (314.56)
12.3803 (314.46) 12.4229 (315.54)
12.4189 (315.44) 0.0345 (0.88)
0.0425 (1.08)
14 x 14-16 13.5654 (344.56)
13.5614 (344.46) 13.6040 (345.54)
13.6000 (345.44) 0.0345 (0.88)
0.0425 (1.08)
Maintenance
Models 3180, 3181, 3185, and 3186 Installation, Operation, and Maintenance Manual 111