Hale RSD - Manual (Page 86)

❑ Corrective Maintenance
86 RSD Series Single-Stage PTO Pumps
p/n: 029-0020-92-0
CAUTION !
WHEN TURNING IMPELLERS TO FIT UNDERSIZED RINGS, CAUTION MUST
BE EXERCISED TO ENSURE THAT THE SEAL RING SURFACE RUNS TRUE
WITH THE BORE TO WITHIN 0.002” (0.051 MM).
If the impeller diameter is less than 5.987” (152 mm) and you are not meet-
ing pump performance, you may need to replace both the clearance rings
and the impeller.
1,500 GPM Pump
If the gap between the impeller and the clearance rings is greater than
0.020” (0.508 mm) you must measure the impeller hub diameter. (See Fig-
ure 6-7: “Clearance Ring and Impeller ID / OD Measurement,” on page 85.)
If the impeller diameter is greater than 6.472” (164 mm), the clearance ring
must be replaced.
If the impeller diameter is less than 6.472 (164 mm) BUT more than 6.419”
(163 mm), the impeller hub diameter can be cut (turned down) and “under-
sized” clearance rings can be ordered to compensate for the new impeller
diameter. Contact Customer Service, Hale Products at 610-825-6300.
Also see CAUTION ! note found on page 86.
If the impeller diameter is less than 6.419” (163 mm) and you are not meet-
ing pump performance, you may need to replace both the clearance rings
and the impeller.
Installation Notes – Impeller (and Inducer)
To install, follow the preceding instructions in the reverse order, paying
attention to the following:
❑ Review preceding sections “Before You Begin...” on pape 67 and “Clean-
ing and Inspection Guidelines” on pape 70.
❑ Install the impeller (and inducer) shaft key(s) into the slot(s) on the pump
shaft, then install the impeller (and inducer, if included).
❑ Torque the impeller nut to 110 ft.-lbs. (149 N-m).
❑ Continue tightening the impeller nut until the cotter pin can be installed to
lock the nut in place.
❑ Inspect the system for proper operation before returning the apparatus to
service.