Hale RSD - Manual (Page 88)

❑ Corrective Maintenance
88 RSD Series Single-Stage PTO Pumps
p/n: 029-0020-92-0
4. With the pump housing properly supported, remove the twelve (12)
7/16”-14 screws securing the pump head to the volute. (See Figure 6-8:
“Pump Gear, Shaft and Seal Replacement,” on page 87.)
WARNING !
SECURE THE PUMP HEAD ASSEMBLY TO AN APPROPRIATE HOIST TO
PREVENT THE HOUSING FROM FALLING, CAUSING POSSIBLE PERSONAL
INJURY OR EQUIPMENT DAMAGE.
5. Slide the pump head assembly back EVENLY to remove the assembly
from the volute. Exercise care to avoid damaging the impeller, front
clearance ring and O-ring seal as the assembly is removed from the
volute. (See Figure 6-8: “Pump Gear, Shaft and Seal Replacement,” on
page 87.)
6. Move the pump assembly to a clean work area and clamp into a suitable
and stable holding device being careful not to damage any sealing
surfaces.
7. Remove the outer bearing (if still attached to the shaft), pump gear,
shaft key and spacer and set safely aside.
8. Scrape any gasket material from the mating surfaces of the pump hous-
ing and gearbox. (See Figure 6-8: “Pump Gear, Shaft and Seal
Replacement,” on page 87.)
9. Remove the impeller, see “Impeller,” on page 83. Also remove the
mechanical seal, see heading “Removing the Seal” on page 91.
10. Remove the retaining ring within the pump head.
11. Using a soft mallet, drive the pump shaft (and inner bearing) out the
back of the pump head. If necessary remove the mechanical seal sta-
tionary seat from the pump head - see Section 6a “Mechanical Seal
Assembly” on page 91.
12. Remove the oil seal from the pump head and discard. Oil seals cannot
be reused.
13. Carefully inspect the bearings, pump gear and shaft and other parts for
excessive wear, chips, scoring or other damage. Repair and/or replace
accordingly.