Hale RSD - Manual (Page 84)

❑ Corrective Maintenance
84 RSD Series Single-Stage PTO Pumps
p/n: 029-0020-92-0
2. Remove the cotter pin from
the impeller nut.
3. While holding the impeller
with a strap wrench,
remove the impeller nut.
Note: On 1,500 GPM (5,678
LPM) pumps, an inducer and
shaft key are installed directly in
front of the impeller. Remove
the inducer and shaft key, then
the impeller. (See Figure 6-6:
“Inducer - 1,500 GPM Pump.”)
4. To avoid damaging the
impeller, use wedges (3) or
a bearing puller to remove
the impeller from the pump
shaft. Place the wedges or puller at the impeller vane area where the
metal is the heaviest.
Note: Tap the pump shaft end, using a dead blow hammer, to free the impeller
(or inducer, if included) from the pump shaft. Use care to avoid damage to the
shaft threads.
CAUTION !
DO NOT STRIKE THE IMPELLER (OR INDUCER, IF INSTALLED). IRREPARA-
BLE DAMAGE COULD RESULT. MAKE CERTAIN THE WEDGES OR PULLER
IS PLACED AT THE IMPELLER VANES TO AVOID IRREPARABLE DAMAGE.
5. Slide the impeller from the pump shaft, then remove the impeller shaft
key and set safely aside.
6. Inspect the rear clearance ring for wear and replace accordingly. See
heading “Clearance Rings, Impeller Measurement” on page 85.
Note: Removing the rear clearance ring from the pump housing renders the ring
inoperative. It must be replaced.
7. Removing the impeller may disturb the mechanical seal - install a new
seal. See Section 6a “Mechanical Seal Assembly” on page 91.
Figure 6-6: Inducer - 1,500 GPM Pump