Goulds Pumps 3408A - IOM - Manual (Page 42)

NOTE: A locknut and lockwasher are not installed on
the inboard end of the pump shaft. It is acceptable to
leave the grease relief plug installed on the inboard
side for Step 22.
23. Repeat steps 15 through 22 for the inboard end.
IMPORTANT: Steps 15 through 25 and must be
completed within 10 to 12 minutes to assure proper
placement of the mechanical seal.
24. Reinstall the coupler on the end of the shaft.
25. Set the rotating element in the pump casing, assuring
correct rotation. Locate both stuffing box tongues in
their respective casing grooves. Locate the pins in the
stuffing box and the casing wear rings in their
respective slots at the casing parting surface. Correct
any O-ring bulging. See Figure 27.
$
! CAUTION
DO NOT CUT OR DAMAGE THE O-RINGS WHEN
LOWERING THE ROTATING ELEMENT INTO
POSITION. WHEN ALL FOUR ANTI-ROTATION
PINS ARE LOCATED CORRECTLY, THERE WILL
BE SOME CASING RING LOOSENESS.
26. Apply a small bead of Dow Corning RTV silicone
sealant or equal at the parting line on top of gasket at
the stuffing box O-rings. See Figure 28.
Figure 27: Rotating element inside casing
Figure 28: Adding Sealant
Figure 29: Casing Main Joint
27. Locate the upper half of the casing into place using the
tapered dowel pins and install the casing main joint
bolts. See Figure 29. The casing joints should be
tightened to the following torques: 140 ft.-lb.
minimum for 5/8"-11 hex head cap screws (Grade 5);
350ft.-lb. minimum for 7/8"-9 Ferry Cap Counterbore
screws (Grade 8). Bolt torquing pattern is shown in
Figure 12.
NOTE: Torque values are essential in obtaining proper
gasket compression so no leakage can occur at the
main joint.
28. Rotate the shaft by hand to assure that it turns
smoothly and it is free from rubbing or binding.
29. Reinstall the coupler, check for alignment, and install
the coupler guard. See the sections entitled Alignment
Procedure and ANSI/OSHA Coupler Guard
Removal/Installation.
34
3408A IOM 6/08