Goulds Pumps 3610 - IOM - Manual (Page 76)

Maintenance
API limits are listed in the Shaft and rotor runout requirements table.
5. Install the casing wear rings (164) over each impeller ring (142).
Be certain the smaller outer diameter is nearest the impeller when installing.
6. Install the throat bushing (125) on each side of the impeller.
Be certain the smaller outer diameter is nearest the impeller when installing.
NOTICE:
The impeller and wear-ring clearance setting procedures must be followed. Improperly
setting the clearance or not following any of the proper procedures can result in sparks,
unexpected heat generation, and equipment damage.
Install the rotating element
1. Use straps and a crane to insert the rotating element into the casing lower half:
Take extra precaution not to scuff the impeller (101), impeller nuts (124 and 130), or throat
bushing surface.
2. Slowly lower the rotating element into the case lower half. Make sure to center the impeller
in the discharge volute. Move and position the throat bushing, along with the case wear ring
such that these components are located on the proper bores and that the anti-rotation pins
are fully seated in their respective slots.
3. Use straps and a crane assembly to assemble the upper half of the casing.
4. Torque the head bolts to the values found in the Maximum torque values for fasteners
table:
a) Apply an anti-seize compound to the bolts and to the face of the head where the nuts
make contact.
b) Install a nut on every other stud.
c) Tighten the nuts evenly to bring the two halves of the case together.
d) Mark each of these nuts as Group A.
e) Install the remaining half of the nuts (Group B).
f)
Apply a torque of approximately 150 ft-lb (203 Nm) to the Group B nuts.
g) Match mark the Group B nuts to the head.
h) Further tighten the Group B nuts by turning each nut clockwise 17° to 19° past the mark
on the head.
i) Loosen the Group A nuts.
j) Repeat steps F through H for the Group A nuts.
74 Installation, Operation, and Maintenance Manual