Hale Q Series Muscle - Manual (Page 144)

 Packing and Mechanical Seal Maintenance
144 MUSCLE (Midship) Pumps Installation, Operation, and Maintenance Manual
p/n: 029-0020-63-0
Figure 8-7: Qflo / Qflo-Plus / Qpak Mechanical Seal Assembly Overview
4. EVENLY turn the jacking screws clockwise to back the bearing housing out of the
pump body. Make sure the assembly is properly supported.
5. Remove the gearbox and impeller assembly to a suitable work area.
6. Be careful NOT to damage the brass clearance rings or impeller as you separate
the gearbox assembly from the pump head.
7. Remove cotter pin and nut from impeller shaft.
Note: On Qpak pumps an inducer is installed directly in front of the impeller. First remove
the inducer, then the impeller.
8. Using a suitable puller, remove the impeller and impeller key from the shaft and
set safely aside.
9. Use hooks that fit around the shaft and seal, then remove the mechanical seal
assembly. (See Figure 8-8: “Mechanical Seal Overview / Replacement” on page
144.)
10. Remove the cup and seat from the bearing housing.
Figure 8-8: Mechanical Seal Overview / Replacement
11. Clean the impeller shaft and all components - proceed to Section 6, heading 7.3
“Cleaning and Inspection Guidelines” on page 106.
12. Measure the impeller wear surfaces and the clearance rings for excessive wear -
see heading “Inspection – Clearance Rings” on page 124.
13. If necessary, remove and replace the clearance rings in the pump body and rear
bearing housing.