Goulds Pumps 3640 - IOM - Manual (Page 67)

Maintenance
Table 1: Impeller setting
This table shows the factory settings for positioning the impeller. The X dimension is given in inches.
These dimensions are not applicable to other size groups.
Frame group Nameplate radial Size “X” Dimension
bearing
Ball/Ball arrangement
inch (mm)
S 6407 2x4-12 12.06 (306.3)
2.5x6-12 11.56 (293.6)
M 6309 3x6-12.5 13.44 (341.4) 1
4x6-13 12.75 (323.9) 1
L 6312 6x8-13.5 15.94 (404.9)
8x10-13.5 16.25 (412.8)
1 Includes spacer (217)
13. Remove the impellers (101 and 145), the casing spacer (443D), and the impeller spacer
sleeve (443A).
Preassembly inspections
Replacement guidelines
Casing check and replacement
WARNING:
Avoid death or serious injury. Leaking fluid can cause fire and/or burns. Inspect and assure gasket sealing
surfaces are not damaged and repair or replace as necessary.
Inspect the casing, head, and casing spacer for cracks and excessive wear or pitting.
Thoroughly clean gasket surfaces and alignment fits to remove rust and debris.
Repair or replace these parts if you notice any of these conditions:
• Localized wear or grooving that is greater than 1/8 in. (3.2 mm) deep
• Pitting that is greater than 1/8 in. (3.2 mm) deep
• Irregularities in the casing-gasket seat surface
• Wear ring clearances that exceed the values in the Minimum running clearances table
NOTICE:
When clearances between the rings become excessive (increase by 50%), hydraulic
performance decreases substantially.
Casing areas to inspect
The arrows point to the areas to inspect for wear on the casing:
Model 3640 Installation, Operation, and Maintenance Manual 65