Hale 80FC - Manual (Page 70)

❑ Preventive Maintenance
70 Pump Ends
p/n: 029-0020-61-0
In dirty or sandy water, the impeller hub and clearance rings wear faster. The
more wear, the greater the bypass and lower pump performance.
It should not be necessary to replace clearance rings until a loss in pump per-
formance is noticed during the annual test – see heading “Performance Testing”
on page 68. For clearance ring and impeller service, proceed to Section 6,
heading “Impeller” on page 93.
Often, replacement of the clearance rings reduces the bypass and restores the
pump to near original performance. A complete restoration requires that the
impellers also be replaced. See Section 6 “Repair” on page 77 for maintenance
and repair information if pump disassembly is required.
Anode Check
Hale offers two types of anodes
(consumables):
❑ Zinc anode - recommended for
all pumps where corrosion is an
issue, including brackish or salt
water exposure. Zinc anodes
should be inspected every
twelve (12) months.
❑ Magnesium anode - available if
the pump already uses zinc
anodes and galvanic corrosion
is still a concern.
Magnesium anodes, which are consumed at a faster rate, should be
inspected ever three (3) or four (4) months. Magnesium anodes contain a
notch in the hex head for identification. (See Figure 4-6: “Hale Anode.”)
Replace anodes when over 75% of the metal has been consumed. Perfor-
mance of the anode life varies with water quality and pH. Anodes conform to
MIL Spec. A180001.
Figure 4-6: Hale Anode