Goulds Pumps 3700 - IOM - Manual (Page 75)

Maintenance
101 Impeller
202 Impeller wear ring
203 Impeller wear ring (No Requirement for 3700LF)
Figure 13: Impeller wear ring
125 Seal-chamber throat bushing
184 Seal-chamber cover
230 Seal-chamber cover wear ring
Figure 14: Seal chamber cover wear ring
When to replace wear rings
Replace wear rings when the diametrical clearance exceeds two times the minimum clearance
as shown in this table or when the hydraulic performance has decreased to unacceptable
levels.
Table 7: Minimum running clearances
Diameter of impeller wear ring Minimum diametrical clearance
in. mm in. mm
<2.000 <50 0.010 0.25
2.000 to 2.4999 To to 64.99 0.011 0.28
2.500 to 2.999 65 to 79.99 0.012 0.30
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance 73
Manual