69
NOTES
Unless match marking differs, place the two (2) casting bosses at the 6 o-clock posi-
tion on the volute (see Figure 19) regardless of volute orientation.
Gentile tapping with a non-marring hammer may be required to seat the suction head
on the volute.
Use care NOT to damage (pinch) the O-ring if using the bolts to pull the suction head
onto the volute (especially if the suction head is angled). Additional O-ring lubricant
may be required.
E. Install fasteners.
Clean original fastener threads (or replace with the correct new fasten-1.
ers).
Apply Loctite™ 243 (or equivalent) to threads of fasteners. 2.
Install four (4) 7/16 — 14 X 2.63–in studs that hold suction head to vol-3.
ute.
Install eight (8) 7/16 — 14 X 1.25–in screws that hold suction head to 4.
volute.
Refer to Table 22 for recommended torque values for fastener size and 5.
material.
F. Connect mounting bracket(s) as noted/match marked.
G. Connect any electrical wiring according to tags.
H. Connect all suction, discharge, and cooling tubing and piping as noted/match
marked.
I. Perform paragraph 4.4.4.1.3, Performance Testing Test Procedure, to verify
repair complete and pump in working condition. Repair any leaks or prob-
lems. (See page 41.)
J. Update maintenance log entries.
K. Place apparatus in service in accordance with departmental procedures.
5.8.4.2 RSD Volute R&R
In addition to gasket/O-ring failure the pump body components require removal to examine or
access internal pump components (clearance rings, inducer, impeller, or mechanical seal). Typi-
cally, the volute would not require replacement unless it has been damaged by allowing the
pump to freeze with water in it or a large piece of debris was allowed into the pump by not using
or maintaining strainers.
The RSD volute removal does NOT require suction head removal unless required for access pur-
poses.
NOTE
If the joint between the volute and the pump head appears to be leaking water or the
volute is damaged, volute removal is required. If a leak is indicated, water staining
will appear on the paint between the assemblies. Additionally mineral deposits may
also indicate a leak at the joint.
Refer to Table 26 for a list of tools and/or consumables required for this procedure.
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