Hale 80FC - Manual (Page 88)

❑ Corrective Maintenance
88 Pump Ends
p/n: 029-0020-61-0
WARNING !
DO NOT STRIKE THE IMPELLER. IRREPARABLE DAMAGE COULD RESULT.
MAKE CERTAIN THE WEDGES OR PULLER IS PLACED AT THE IMPELLER
VANES TO AVOID IRREPARABLE DAMAGE.
3. To avoid damaging the impellers, use wedges (3) or a bearing puller to
remove the impellers from the pump shaft. Place the wedges or puller at
the impeller vane area where the metal is the heaviest. Also see Figure 6a-
5: “Placing Edges for Impeller Removal” on page 95.
Notes: Also try tapping the pump shaft end, using a dead blow hammer, to free the
impeller from the pump shaft. Use care to avoid damage to the shaft threads.
4. Inspect all parts for excessive wear, chips, scoring or other damage. Repair
and/or replace accordingly.
Mechanical Seal – 20FS Series Pump Only
Removing the impeller may disturb the mechanical seal, or if the seal requires
replacement - install a new seal by first removing the pump shaft retaining ring,
spring holder (retainer) and the old seal assembly.
For servicing the mechanical seal, see Section 6b, “Mechanical Seal Assembly”
on page 111.
After installing the new mechanical seal, remember to reinstall the seal spring
holder (retainer) and retaining ring. Also see Figure 6a-2: “Oil Seal, Pump
Shaft” on page 89.
Installation Notes – Pump Body and Impellers
To install the pump body and impellers, follow the preceding steps in the
reverse order, paying attention to the following:
❑ Review heading 6a.1 “General Preparation” on page 85.
❑ Replace all gaskets. Apply a small amount of grease to the gasket(s) and
align on the pump body.
❑ If the bearing housing assembly internal bearings (2) are removed, use a
press to install them and assure both are replaced.
❑ Install the impeller shaft key into the pump shaft, then install the rear impel-
ler, center bearing and front impeller checking the match-markings for proper
alignment. Also assure the impeller hubs are facing in the correct direction.
(See Figure 6a-1: “20FS Series, Pump and Bearing Housing Overview” on
page 86.)