Hale Q Series Muscle - Manual (Page 121)

121 MUSCLE (Midship) Pumps Installation, Operation, and Maintenance Manual
p/n: 029-0020-63-0
Repair and Corrective Maintenance 
WARNING!
THE IMPELLER ASSEMBLY IS HEAVY. DO NOT ATTEMPT TO LIFT THE ASSEMBLY
WITHOUT THE AID OF PROPER LIFTING APPARATUS CAPABLY OF HANDLING THE
LOAD. FAILURE TO DO SO COULD RESULT IN PERSONNEL INJURY OR PROPERTY
DAMAGE.
10. See heading “Cleaning and Inspection Guidelines” on page 106.
 Clean the gasket sealing surfaces of the upper and lower pump bodies, as
well as those on the AutoLube and the rear bearing housing face. Whenever
gaskets are removed, they must be replaced.
 Clean the clearance ring and clearance ring seats in both the upper and lower
pump body halves to so that the new clearance rings seat properly.
Note: Pitting of the clearance rings may occur from the build-up of material and the effects
of corrosion. Once the seats are cleaned, any pitting on the clearance rings is considered
normal.
Disassembly - QMAX/QMID Single-Stage Pump
1. Place the impeller shaft assembly on a suitable workbench, capable of handling
the load.
2. Carefully remove the AutoLube assembly from pump shaft end. Also see heading
“QMID/QMAX/QTWO AutoLube ® Service” on page 116.
3. Remove the outer retaining ring and clearance ring. (See Figure 7-7: “Qmax /
Qtwo Assembly Overview,” on page 120.)
Before removing the impeller, note the orientation of the vanes for proper reas-
sembly. The vanes turn in a clockwise manner when viewed from the front.
4. Using an acetylene torch, carefully heat the “eye” and hub of the impeller
EVENLY for approximately two minutes.
When heated properly, the impeller is removed from the pump shaft using a gear
puller. If the impeller moves but does not slide freely, do not immediately reheat.
Allow the assembly to cool to room temperature, then reheat again and continue
removing the impeller.