Goulds Pumps API 3171 - IOM - Manual (Page 53)

There are several methods that you can use in order to install bearings. The recommended method is
to use an induction heater that heats as well as demagnetizes the bearing.
CAUTION:
Wear insulated gloves when you use a bearing heater. Bearings get hot and can cause physical injury.
3. Install the lockwasher (382) on the shaft (122). Make sure that the tang of lockwasher is in the keyway
of the shaft.
4. Thread the locknut (136) onto the shaft and tighten the locknut until it is snug.
5. Bend any tang of the lockwasher into one of the slots on the locknut. Tighten the locknut if necessary
to align a lockwasher tab with a locknut slot.
6. Press the grease seal (333) into the bearing shell (134).
7. Slide the bearing shell onto the pump-end of the shaft and over the bearing.
8. Insert the retaining ring (361A) in the bearing shell groove. Make sure to keep the flat side against the
bearing.
9. Slide the labyrinth seal (332A) over the coupling-end of the shaft into the bearing shell until it is flush.
10. With the support plate in a vertical position, slide the shaft horizontally through the motor support.
Support the shaft and column with suitable stands.
11. Install the hold-down bolts (370C) and jacking bolts (370D) with jam nuts (415).
Assemble the column
If intermediate steady bearings are required, then you need additional column extensions (306) and steady
bearing housings (213).
1. Prepare the steady bearing housing assemblies, if applicable.
You do not need to precisely center the steady bearing, and the holes in the bearing do not need to
line up with the holes in the housing. A recessed area inside the housing (213) allows lubricants to find
the opening in the bearing.
a) Remove the snap ring (369), if applicable.
b) Use a hydraulic press in order to press out the old steady bearing (197).
c) Press in the new steady bearing.
A snap ring (369) is no longer required due to the fits. If your pump has a snap ring, then it is not
necessary to reinstall it. However, the snap ring is still required on sealed bearings.
2. Slide the casing assembly onto the shaft and seat the casing flange against the column flange.
Make sure the discharge nozzle is aligned with the discharge pipe hole in the support plate.
3. Install the bolts (371G).
Assemble the impeller, suction cover, and strainer
1. Add a film of oil to the shaft and place the impeller key (178) and impeller (101) on the shaft.
2. Check that all of the bearing shell bolts (370C and 370D) are completely backed off.
3. Install the impeller washer (199) and impeller screw (198).
When you tighten the impeller screw, the impeller will be seated on the shaft. The impeller screw has a
nylon insert to lock it in place. Do not exceed these torque values when you tighten the impeller
screw:
Group Torque value
S/ST 500 in-lbs (56 Nm)
M/MT and L 900 in-lbs (102 Nm)
4. Install the suction cover gasket (351), suction cover (182), and strainer (187) with bolts (317N).
Alloy strainers have extra-heavy spacer washers (533) between the strainer and the suction cover. If
the unit is supplied with a lower-float control guide arm (366), then use an extra-long bolt in this hole.
5. Check the axial travel of the impeller.
Maintenance
Model API 3171 Installation, Operation, and Maintenance Manual 51