Hale MBP Booster - Manual (Page 74)

73 Silencer Series Booster Pump, p/n: 029-0020-83-0
Preventive Maintenance
❑
❑ Minimum Outside Diameter -
APS - ........ 4.74” (120.4mm)
MBP -......... 5.60” (142.2mm)
If the measured diameter is equal to or less than the maximum outside wear
limit a new impeller must be installed.
When new, the radial clearance between the impeller hubs and the clear-
ance rings are between 0.005” to 0.007” (0.127-0.78mm) per side. Maxi-
mum acceptable radial clearance on used pumps is between 0.015” to
0,020” (0.381-0.508mm) per side.
If the clearance rings on the booster pump show significant wear but the
impeller itself is within the size tolerance, “undersized” clearance rings can
be installed to delay a complete rebuild. Contact Customer Service at Hale
Products at 610-825-6300.
Installation Notes – Impeller
To install, follow the preceding instructions in the reverse order, paying
attention to the following:
❑ Review preceding sections “Before You Begin...” on pape 63 and “Clean-
ing and Inspection Guidelines” on pape 65 to ensure a thorough
installation.
❑ Install the impeller shaft key into the slot on the pump shaft.
CAUTION !
DO NOT STRIKE THE IMPELLER. IRREPARABLE DAMAGE MAY RESULT.
❑ Carefully slide the impeller over the pump shaft, aligning the keyway with
the impeller key.
❑ Torque the impeller nut to 110 ft.-lb. (149 N-m).
❑ Continue tightening the impeller nut until the cotter pin can be installed to
lock the nut in place.
❑ Install cotter pin.