HALE AP, Technical Manual

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D. Align new clearance ring to suction head.
DO NOT DRIVE THE CLEARANCE RING INTO THE SUCTION HEAD AT AN ANGLE OR
UNEVENLY (ALL THE WAY FROM ONE SIDE AT A TIME). BENDING, WARPING, OR
CHIPPING THE CLEARANCE RING MAY RESULT IN POOR PERFORMANCE OR PUMP
FAILURE.
NOTE
A circular piece of plate steel the size of the outside diameter of the clearance ring
may be used to prevent the ring from tipping or jamming inside the suction head.
E. Using hydraulic press, install clearance ring into suction head.
F. Apply a heavy coating of grease to clearance ring.
NOTE
The grease protects the clearance ring during the initial pump priming to prevent the
ring from contacting the impeller.
RSD Pump Head Clearance Ring Removal
A. Place pump head on stable work surface with drive side down.
NOTE
As an alternate method for removing ONLY the 750–1250 gpm RSD wrap around
clearance ring, the thick portion of the clearance ring may be drilled and taped for
two (2) 3/8–16 X 1-1/2-in long (all thread) jackscrews. See Figure 45. Position the
jackscrew holes to be within any two of the pump head recesses and 180° apart.
Figure 46. RSD Wrap Around Clearance Rings
B. Using three (3) L-shaped pry bars and a shop hammer, drive a pry bar under
failed clearance ring at each of three (3) recesses in pump head casting.
(The cavities/recesses are spaced 120 ° apart around the pump head.) See
Figure 46.