Goulds Pumps 3620 - IOM - Manual (Page 66)

Maintenance
Frame group Nameplate Size Ball/ball Sleeve/ball KTB
radial bearing arrangement arrangement arrangement
10x12-17SQ
15.19 (386) 20.66 (525)
10x12-18SQ M / MX 6312
All others 13.12 (333)
14x16-20Q 16.31 (414) 22.36 (568)
L / LX 6313
All others 15.19 (386) 20.66 (525)
18x20-21 17.75 (441)
XL 6318
All others 16.31 (414)
18x20-24 22.38 (568) 29.12 (740)
X
20x24-30 28.75 (718)
14x16-22
16x18-17
XXL 20.50 (521) 27.38 (695)
18x20-22
6320
20x24-25
8x14-31
14x18-30
XLX 15.81 (402)
10x16-30
12x18-26
14x20-26
19.75 (502) 26.5 (673)
XX 6224 14x20-30 20.75 (527) 27.5 (699)
12x20-34 19.62 (498) 26.38 (670)
13. Remove the impeller (101).
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 and head 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:
64 Model 3620, API Type BB2 Single Stage / ISO 13709 1st/2nd Ed. / API 610 8th-11th Ed. Installation, Operation, and
Maintenance Manual