Goulds Pumps HS - IOM - Manual (Page 26)

CLEARANCE ADJUSTMENT
The HS impeller should have approximately 1/8”
running clearance for the back vanes on the stuffing
box side of the impeller. The standard HS bearing
assemblies are machined to provide the proper
clearance without any adjustment features.
TO DISASSEMBLE THE LIQUID END
1. Drain all liquid from the pipe line. Remove the
discharge flange bolts and the suction pipe.
2. Remove the cap screws which fasten the casing (100)
to the SB Cover (184). Carefully slide the casting
away, making sure it does not drop down onto the
impeller after it has cleared the fit in the SB Cover
flange.
3. Remove the impeller:
The standard impeller has an impeller nut and drive
key. Unscrew the impeller nut (right hand pump will
have a right hand impeller nut) and then carefully pull
the impeller off the end of the shaft.
4. Remove the cap screws which fasten the stuffing box
cover (184) to the bearing housing (134A). Carefully
slide the cover from the end of the shaft (122).
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CAUTION
Some HS pumps utilize the same cap screws to secure
the casing and SB cover. In this case, clamp the SB
cover in a position while removing the casing. Then
the SB cover may be carefully slid from the shaft.
5. The sleeve (126) may be pulled from the shaft (122).
If the stuffing box is packed, remove gland (107), seal
cage (105) and packing (106).
TO ASSEMBLE THE LIQUID
1. The shaft sleeve (126) must be clean and free of burrs.
Slide the sleeve onto the shaft until it butts against the
shaft shoulder.
2. Slide the SB Cover (184) into position over the shaft
sleeve against the bearing housing. Secure in place
with cap screws.
3. Install the impeller - Standard key drive: Make sure
O-ring (412F) is in place on the impeller hub and the
key (178) is in place on the shaft. Push the impeller
into position and tighten on the impeller nut without
the second O-ring (412F). Remove the impeller nut,
install the second O-ring and retighten the impeller nut.
4. Install gasket (351) on the casing and carefully lift the
casing into position against the SB Cover. Secure with
cap screws.
5. Install the necessary packing, lantern ring and gland in
the stuffing box, but do not tighten the gland more
than slightly snug until the pump has been run.
20
HS IOM 5/08