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Piston seals: when output drops appreciably
Pump head seals: when significant amounts of leachate leaks from the indicator hole on the
pump head
PISTON SEALS
The piston assembly includes two U-cup straight
seals. When pumping particulate filled leachate,
the average life expectancy for these two piston
seals is 3-4 months, whereas when pumping
clean water one can expect at least 12-18
months before any changes need to be made.
Piston seal wear is indicated by an appreciable
decrease in pumping output when other causes
are ruled out. Even if the piston seals wear, the
pump should continue to operate and continue
to pump liquid.
In order to replace the U-cup seals on the piston, the lower pump assembly must be pulled from the
well. Once disconnected from the drop assembly, the piston can then be pulled out the top end of the
pump. Upon removal of the old seals, the new piston U-cup seals
MUST
be installed with the open end
of “U” facing
UPWARD
. The piston assembly can be re-inserted into the cylinder body from the
TOP
end
and plunged downward into position. Do not forget the ¾” SS ball before re-screwing the cylinder seat
into place.
PUMP HEAD SEALS
The pump head assembly includes our seal body
as well as the seal body pin.
When pumping particulate filled leachate, the
average life expectancy for these seals is 3-4
months. When pumping cleaner water expect 12-
18 months before any seal replacements need to
be made.
The seal body can be replaced as a complete
assembly or replacement seal kits are also
available. Many customers keep spare complete
seal body assemblies on hand to be easily
exchanged in the field, with additional seal kits to replace worn seals once the seal bodies are removed
from the field.
