Figure 6a-5: placing edges for impeller removal, Clearance rings, impeller measurement – Hale 80FC User Manual
Page 95
95
Pump Ends
p/n: 029-0020-61-0
Co rr ec tive M ain te n an ce
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Figure 6a-5: Placing Edges for Impeller Removal
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.
4.
Inspect the clearance ring seated within the pump head - see heading
“Clearance Rings, Impeller Measurement.”
5.
Removing the impeller may disturb the mechanical seal. A new seal must
be installed - see heading 6b “Mechanical Seal Assembly” on page 111.
Clearance Rings, Impeller Measurement
Inspect the front and back of both clearance ring IDs and ODs in several places
for signs of wear. Using a caliper, measure the inside diameter of each ring in
several places. (See Figure 6a-6: “Clearance Ring and Impeller ID / OD Mea-
surement” on page 96.)
When new, the radial clearance between the impeller hub and the clearance
rings is between 0.005” to 0.007” (0.127-0.78mm) per side. Maximum accept-
able radial clearance on used pumps is between 0.015” to 0.020” (0.381-
0.508mm) per side.
Note: Clearance rings should be measured while pressed into the body.