Goulds Pumps 3910 11th ed. - IOM - Manual (Page 52)

14. Check impeller (101) impeller wear ring (202) runout
in the following manner:
a. Mount dial indicator as shown in Fig. 63.
b. Rotate shaft (122) so indicator rides along wear
ring (202) surface for 360 degrees. If total
indicator reading is greater than 0.13 mm (.005
in.), determine cause and correct.
INSTALLATION OF CARTRIDGE
TYPE MECHANICAL SEAL AND
SEAL CHAMBER COVER
NOTE: Refer to mechanical seal manufacturer’s draw-
ings and instructions for assistance during installation of
mechanical seal.
1. Loosen and remove impeller nut (304).
NOTE: Impeller nut has LEFT HAND threads.
2. Remove impeller (101), impeller key (178), and seal
chamber cover (184) as described in disassembly.
3. Lubricate all O-rings with suitable lubricant, unless seal
manufacturer’s instructions indicate otherwise.
4. Slide cartridge seal assembly (rotary, stationary, gland,
gland gasket and sleeve) onto shaft (122) (Fig. 57).
NOTE: Ensure that mechanical seal gland piping
connections are properly oriented.
5. Rig sling to eyebolt and to overhead lifting device.
6. Lift seal chamber cover (184) and position to align
with shaft (122).
7. Install seal chamber cover (184) on power end by guiding
cover carefully over cartridge seal rotary and ensuring
that gland studs (353) smoothly enter holes in cartridge
seal gland and that cover pilots into bearing frame (228)
lock.
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CAUTION
Mechanical seal parts may be damaged if they or
adjacent parts are handled improperly.
8. Install seal chamber cover/bearing frame bolts (370H)
and tighten using alternating pattern. Torque bolts to
values shown in Table 7.
9. Install gland stud nuts (355) and tighten evenly to
torque values shown in Table 7.
10. Tighten set screws in locking collar.
11. Disengage spacer ring or clips.
12. Check for free turning. If rubbing or excessive drag is
detected, determine cause and correct.
INSTALLATION OF IMPELLER
NOTE: It is desirable to repeat runout checks on seal
chamber cover face, lock and wear ring surfaces as
previously described in “Preliminary Installation of Seal
Chamber Cover”.
1. Install impeller key (178) in keyway of shaft (122).
Key should be at top (12 o’clock) position for
installation of impeller (101).
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CAUTION
When handling impeller, wear heavy work gloves to
prevent cutting hands on sharp edges.
52
3910-1
1th IOM 5/08
Fig. 56
Fig. 57