Goulds Pumps XHD - IOM - Manual (Page 87)

Maintenance
11. Remove and clean or replace bulls eye sight glass (319) and opposite sight glass (408N) if
necessary.
Disassembly of other power end configurations
The disassembly of other available power end configurations is very similar to that of the XHD
oil-lubricated power end. All of the major pieces of the power end (bearing cartridge, end
covers, bearings, etc.) are designed for use with all options so only a few components will
change regardless of the type of lubrication or isolators used.
The following subsections highlight the main differences in the disassembly of power end
configurations other than the XHD oil-lubricated power end.
Disassemble the power end XHD, grease lubrication
• Regardless of the type of lubrication, the XHD power end uses labyrinth (Inpro) seals as
bearing isolators. Disassembly of the end covers and isolators will follow the same
procedure as that of the XHD oil-lubricated version.
• The only major difference between oil and grease lubricated power ends for the XHD is the
use of grease shields, as shown on the figure below. During disassembly these can be
removed, inspected and replaced as necessary.
• There are also grease fitting plugs (319H) and grease relief plugs (319Y) installed into the
bearing cartridge housing (228) used for purging and regreasing the grease lubricated
XHD power end. During disassembly these fittings can be removed, inspected and
replaced as necessary.
• There will be no sight glass (319) or opposite sight glass (408N) on the grease lubricated
power end.
Disassemble the power end XHD Value Option, oil lubrication
• The XHD oil lubricated power end uses double lip seals as bearing isolators. Instead of
pipe plugs, there will be grease fitting plugs in the bearing cartridge end covers for the
addition of grease as necessary to maintain the double lip seal contaminant barrier.
• The double lip seals have the same fits as the labyrinth seal isolators used on the XHD
power end. There is no difference in the end covers between these or any of the power
ends, regardless of the type of lubrication and basic/fully featured model. The lip seals can
be removed in the same manner as described for the XHD power end.
Disassemble the power end XHD, grease lubrication
• The XHD grease lubricated power end also uses double lip seals as bearing isolators. The
same bearing shields employed on the XHD grease lubricated power end are used as well
to properly maintain grease in the bearings. The bearing shields can be removed,
XHD Installation, Operation, and Maintenance Manual 85