8.
Tighten the adjustment plate hold-down bolts (352G) and nuts (427D) that clamp the bearing frame
adjustment plates (234F) to the pedestal (131). Make sure that the dial indicator reading remains at
the proper setting.
9.
Tighten the two adjusting nuts (415A) on the rearward side of the bearing frame adjustment plates
(234F) that were loosened in step 5 above by turning them clockwise. Make sure that the dial indi-
cator reading remains at the proper setting.
NOTICE:
It is critical that adjustment plate hold down bolts (352G) and nuts (427D) are properly torqued
to prevent the power frame from moving during operation.
10. Replace the coupling or v-belt guard.
5.6.3 Suction seal ring clearance check - XHD only
WARNING:
Failure to disconnect and lock out driver power may result in serious physical injury or death.
Always disconnect and lock out power to the driver before performing any installation or main-
tenance tasks.
•
Electrical connections must be made by certified electricians in compliance with all inter-
national, national, state, and local rules.
•
Refer to driver/coupling/gear manufacturer's installation and operation manuals (IOM) for
specific instructions and recommendations.
In addition to checking the impeller clearance, the suction seal ring clearance on the XHD model must
also be checked according to the following instructions for optimal efficiency and wear.
All of the instructions that are stated in the following steps are based on viewing the unit from the rear-
ward (drive) end.
1.
Loosen the three seal ring jam nuts (357B) by turning them counterclockwise.
2.
Turn the three square head adjusting bolts (356F) sequentially clockwise, 1/3 of a turn each at a
time, until the seal ring (822) contacts the impeller (101).
3.
Turn the shaft (122) clockwise while performing step 2 above to ensure there is contact between the
seal ring (822) and impeller (101). Stop turning the square head adjusting bolts when a firm drag is
encountered.
4.
Turn the three square head adjusting bolts (356F) sequentially counterclockwise, 1/3 of a turn each
at a time, while measuring the gap between the impeller (101) and seal ring (822) using a set of
feeler gauges inserted in the suction of the pump.
5.
Continue adjusting the square head adjusting bolts as outlined in step 3 above until there is the ap-
propriate gap from table 7 between the suction seal ring (822) and the impeller (101). The gap is
properly established when a appropriate feeler gauge fits snugly into the space between the impel-
ler (101) and seal ring (822).
6.
Lock the square head adjusting bolts (356F) in place by turning the jam nuts (357B) clockwise until
tightened against the suction half casing (100A).
After the clearances have been checked/set, the v-belt or coupling guard can be re-installed. Refer to the
appropriate guard installation instructions specific to your unit(s).
Impeller to Suction liner / Seal Ring Front clearance
0.02 inches
0.50 mm
5.6 Impeller-clearance setting
56
XHD Installation, Operation, and Maintenance Manual
Summary of Contents for XHD
Page 1: ...Installation Operation and Maintenance Manual XHD ...
Page 2: ......