HALE AP, Technical Manual

Page: 80 / 177

68
Perform the following to remove and replace the suction head.
NOTES
Remove any suction tube and/or piping blocking access to the pump per
OEM/equipment manufacturer instructions.
Remove any discharge piping blocking access to the pump per OEM/equipment
manufacturer instructions.
RSD Suction Head Removal
A. If pump is still in apparatus, match mark/note/tag and then disconnect suc-
tion, discharge, and cooling lines.
B. If pump is still in apparatus, tag and disconnect any electrical wiring.
C. Match mark suction head to volute to ensure proper alignment during reas-
sembly (volute position may vary).
D. If pump is still in apparatus, disconnect ONLY mounting bracket(s) required
for suction head removal.
E. Remove eight (8) 7/16 — 14 X 1.25–in screws that hold suction head to vol-
ute.
NOTE
Do NOT damage clearance ring or inducer during suction head removal.
F. Remove four (4) 7/16 — 14 X 2.63–in studs that hold suction head to volute.
G. Remove suction head from volute.
NOTE
Gentile tapping with a non-marring hammer may be required to loosen the suction
head from the volute.
H. Remove O-ring from suction head.
I. Remove all remaining gasket material from mating surfaces of volute and
suction head.
Measure suction side clearance ring (see Table 23.), replace if out-of-tolerance. If the clearance
rings have failed, perform RSD Clearance Ring R&R (see paragraph 5.8.7.2 on page 110). If the
impeller has failed, perform Impeller R&R (see paragraph 5.8.4.6 on page 81). If the mechanical
seal has failed, perform RSD Mechanical Seal R&R (see paragraph 5.8.4.10 on page 93).
RSD Suction Head Installation
A. Apply a small amount of grease to a new gasket and align gasket on suction
head.
B. Apply O-ring lubricant to a new suction head O-ring.
C. Using care NOT to damage O-ring, install O-ring on suction head.
D. Align bolt holes and match mark(s) then push suction head into volute.