5.5
Pinto BT-POM 1212 - Revision 5
Section 5 Pumps
Excessive
Diaphragm Failure
If you have excessive diaphragm failure
check the following points. These will
cause failure of diaphragms due to added
stress or chemical attack.
1 Most Important - Pump not being
fl ushed out daily with clean water
after use.
2 Oil level too low allowing air between
piston and diaphragm.
3 Air leaks in suction line.
4 Restricted suction line.
5 Restriction through suction fi lter.
6 Not cleaning suction fi lter regularly.
7 Worn suction and discharge valves.
8 Bypass line too small to carry full
capacity of pump.
9 In cold climates - frozen suction/
discharge lines or water remaining in
the pump after fl ushing.
10 Incorrect air setting or no air in air
chamber.
11 Agitator excessively restricting
bypass from pump.
12 Diaphragm material construction
incorrect for chemical or solution
being pumped.
13 Chemicals containing toluene or
other aggressive solvents may
require viton diaphragms
- particularly if the pump is not
properly fl ushed after use.
Pump Storage and
Corrosion Protection
1 Warm Climates
If you operate in a warm climate with
no chance of frost in the winter, you
will not have any problems with frost
damage.
If you are storing your sprayer
between seasons, ensure your pump
has been thoroughly fl ushed with
clean water. A good idea is to run
a mixture of 1% solution of summer
mineral spraying oil through the pump
and plumbing system. Summer
spraying oil is water-soluble oil such
as DC-Tron. This will coat and protect
all internal pump parts. Ensure this
mixture is fl ushed out before spraying
commences in the new season.
2 Cold Climates
For prolonged storage, an anti-freeze
mixture can be fl ushed through the
pump. Ensure this is thoroughly
fl ushed out prior to the
commencement of spraying again.
If the pump is being stored overnight
and a risk of freezing is imminent,
drain all liquid from the pump and
lines, including boom lines.
Pre-Season
Servicing
For thorough pre-season servicing - check
all aspects of the Pinto and its operating
components as outlined in the pre-delivery
check list on page 1.7.
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