Goulds Pumps XHD - IOM - Manual (Page 88)

Maintenance
inspected and replaced in the same manner as shown for the XHD grease lubricated
power end.
• Because of the need to provide grease to both the double lip seal bearing isolators and the
bearings themselves, there are grease fitting plugs (319H) installed in both the bearing
cartridge housing (228) and the inboard and outboard bearing end covers (109 and 119).
There are also grease relief plugs (319Y) installed in the bottom of the bearing cartridge
housing (228) for purging and regreasing of the bearings.
• There will be no sight glass (319) or opposite sight glass (408N) on the grease lubricated
power end.
Preassembly inspections
Replacement guidelines
Casing and liners 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 liners for cracks and excessive wear or pitting. Thoroughly clean gasket
surfaces and alignment fits in order to remove rust and debris.
• 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
Impeller replacement
This table shows the criteria for replacing the impeller:
Impeller parts When to replace
Vane edges When you see cracks, pitting, or corrosion damage
Gaskets, O-rings, and seats replacement
WARNING:
Avoid death or serious injury. Leaking fluid can cause fire and/or burns. Replace any damaged or worn
gaskets/o-rings.
• Replace all gaskets and O-rings at each overhaul and disassembly.
• Inspect the seats. They must be smooth and free of physical defects.
• Replace parts if the seats are defective.
Stuffing box cover and seal chamber replacement
• Thoroughly clean the gasket surfaces and fits to remove rust and debris.
• Inspect surfaces for pitting, and excessive wear or corrosion damage.
Power end inspection
Checklist
Check the bearing frame for these conditions:
• Visually inspect the bearing frame and frame foot for cracks.
• Check the inside surfaces of the frame for rust, scale, or debris. Remove all loose and
foreign material.
• Make sure that all lubrication passages are clear.
• If the frame has been exposed to pumped fluid, inspect the frame for corrosion or pitting.
86 XHD Installation, Operation, and Maintenance Manual