125 Seal-chamber throat bushing
184 Seal-chamber cover
222D Set screw
222E Wear ring set screw
230 Seal-chamber cover wear ring
Figure 57: Seal chamber cover wear ring
When to replace wear rings
Replace wear rings when the diametrical clearance exceeds 1.5X the values shown in this table or when
the hydraulic performance has decreased to unacceptable levels.
Table 10: Minimum running clearances
Diameter of impeller wear ring Minimum diametrical clearance
mm
in.
mm
in.
<50
<2.000
0.25
0.010
To to 64.99
2.000 to 2.4999 0.28
0.011
65 to 79.99
2.500 to 2.999
0.30
0.012
80 to 89.99
3.000 to 3.499
0.33
0.013
90 to 99.99
3.500 to 3.999
0.35
0.014
100 to 114.99 4.000 to 4.499
0.38
0.015
115 to 124.99 4.500 to 4.999
0.40
0.016
6.5 Preassembly inspections
84
Model 3700i API610 / Type OH2 Installation, Operation, and Maintenance Manual