Goulds Pumps 3500XD - IOM - Manual (Page 36)

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3500XD IOM 8/07
unbolting. Carefully slide the gland off the gland studs
and move back on shaft and shaft sleeve. Avoid contact
with exposed lapped seal faces and keep them clean.
NOTE: Mechanical seal parts may be damaged if they or
adjacent parts are handled improperly.
11. Remove the adapter to bearing frame bolts (370B) and
pull the adapter and stuffing box cover as an assembly.
Do not allow the stuffing box cover to strike the shaft,
shaft sleeve, or any mechanical seal part.
12. A cartridge mechanical seal is standard. Position and
tighten the centering tabs and loosen the drive collar set
screws. The cartridge seal can then be removed as a
unit.
13. Scribe shaft at coupling hub for proper positioning of
hub during reassembly and remove hub.
To disassemble remainder of the liquid end, casing and
suction sideplate, proceed as follows:
14. Disconnect suction and discharge flanges.
15. Remove casing hold-down bolts and move casing toward
driver. If preferred, casing can be removed from
baseplate for further disassembly.
16. Remove suction sideplates nuts (423A).
17. Remove suction sideplate (176) by tightening the three
jacking screws (370L). Be careful not to damage the
suction sideplate o-ring (412C).
To complete disassembly of power end proceed as follows:
NOTE: Bearing replacement is recommended whenever
bearings are removed from the shaft.
NOTE: Never use a hammer to drive shaft through
bearings. Severe shaft and bearing damage may occur.
18. Remove the bolts (370B) which hold the frame adapter
to the bearing frame. Remove the frame adapter (108).
19. Remove the bolts (360) which hold the inboard bearing
end cover to the frame. Remove the end cover (119A)
and labyrinth seal (125).
20. Remove bearing housing bolts (370C). Impeller
adjustment bolts with jam nuts (370D) can be used to
assist in the removal of the shaft and bearing assembly
from the bearing frame.
21. Slide the complete shaft assembly from back end of
bearing frame. (See Fig. 19) This includes the shaft,
both bearings (radial and thrust), and bearing housing.
Do not lose or damage bearing housing o-ring.
l
! CAUTION
Wear insulated gloves when using a bearing heater.
Bearings will get hot and can cause physical injury.
22. Using a bearing puller or a press, remove the inboard
cylindrical roller bearing (409). Be sure to apply the
removing force to the inner race of the bearing to prevent
damage to the races.
23. Be sure shaft and keyway are free of burrs and sharp
edges so labyrinth seal o-ring will not be damaged and
remove bearing end cover (109A).
24. Slide the bearing housing (134A) off shaft.
25. Straighten “tang” in lock washer (382) and remove
bearing lock nut and washer.
26. Remove coupling end bearing using a bearing puller.
Care must be taken to prevent damage to bearings.
NEVER USE A HAMMER TO DRIVE SHAFT
THROUGH BEARING. Protect bearing from
contamination.
27. The “L” group shaft is equipped with two oil flingers
(236). If the shaft is being re-used, the flingers should
not be removed, as they may be deformed during
removal. If the shaft is being replaced, new flingers
should be used.
Fig. 19