Maintenance
Model API 3171 Installation, Operation, and Maintenance Manual
51
CAUTION:
Risk of physical injury from hot bearings. Wear insulated gloves when using a bearing heater.
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
56 Nm | 500 in-lbs
M/MT and L
102 Nm | 900 in-lbs
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.
Содержание Goulds Pumps API 3171
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