SVCN 7 INSTALLATION, OPERATION, & MAINTENANCE
5. If your pump is equipped with a cartridge-type mechanical seal, rotate (or slide) the
mechanical seal setting plates into their groove on the shaft sleeve and secure them in place,
then loosen the set screws which secure the shaft sleeve to the shaft (1).
6. Attach lifting gear to the bearing housing (2998) to support its weight and prevent it from
tipping over.
7. Remove the bearing-housing-to-head cap screws.
8. Carefully lift the bearing housing (2998) away from the head (85) and place it vertically on
wooden blocks. Do not allow the end of the shaft (1) to touch the floor beneath the blocks.
Secure the bearing housing to prevent it from tipping.
9. If your pump is equipped with a mechanical seal, remove the seal plate nuts (2666B), then
remove the mechanical seal cartridge (3213A) or seal plate and shaft sleeve. If your pump is
equipped with packing, remove the packing gland, lantern ring, and packing box. Remove
and discard the seal plate gasket (2988B).
NOTE
If no pumpage has gotten into bearing housing and you plan
to replace just the mechanical seal, omit the remaining
steps; otherwise continue to disassemble pump as outlined.
10. Pull the outboard fan (2719) off of the shaft with its O-rings (1259E).
11. Loosen lock screw and remove inboard fan (2744) from shaft (1).
12. Remove end cover cap screws and bearing housing end cover (2999B). Remove the bearing
isolator rotor (3043B). Remove and discard the O-ring (1259D). If installed, remove the outer
oiling ring (2889B).
13. Using a wooden mandrel, push the bearing isolator stator (3044B) out of the end cover
(2999B). Remove and discard the O-ring (1259C).
14. To avoid damage to the oiling rings (2889A) (if installed), position them as shown in Figure
4-2 below.
15. Remove the shaft assembly from coupling end of bearing housing. Retain and remove the
bearing isolator rotor (3043A) when the shaft is removed. Remove and discard the isolator O-
ring (1259B). Place the shaft in a soft-faced vise which will allow removal of the bearings
(3036A/B).
16. Using a wooden mandrel, push the bearing isolator stator (3044A) out of the bearing housing
(2998). Remove and discard the isolator O-ring (1259A).
17. Release the locking tab of the thrust bearing lock washer (3150). Remove the thrust bearing
lock nut (453) and lock washer.
18. The thrust and radial bearings (3036A/B) can be removed by the use of a press or puller. Both
bearings should be discarded and replaced with new bearings.
DO2604-13
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