Goulds Pumps XHD - IOM - Manual (Page 49)

Commissioning, Startup, Operation, and Shutdown
6. Place the dial indicator so that the button contacts either the shaft end, face of the coupling,
or face of the sheave bushing or the face of the bearing end cover. Zero the indicator.
7. Turn the two adjusting nuts (415A) on the rear sides of the bearing frame adjustment plates
(234F) sequentially counterclockwise, 1/2 of a turn each at a time, to draw the power end
and impeller (101) backward until there is an approximate 0.02 inch (.50 mm) gap between
the impeller (101) and suction liner (562) as measured on the dial indicator.
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 indicator reading remains at the proper setting.
10. Replace the coupling or v-belt guard.
Suction seal ring clearance check - XHD only
WARNING:
Always disconnect and lock out power to the driver before you perform any installation or maintenance
tasks. Failure to disconnect and lock out driver power will result in serious physical injury.
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 rearward (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 appropriate 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 impeller (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
Install the V-belt drive guard
1. Assembly the drive guard as necessary. Use appropriate hardware.
2. Secure the drive guard in place to the foundation or baseplate and pump as necessary.
Use appropriate hardware.
XHD Installation, Operation, and Maintenance Manual 47