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9
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B. Usage Problems
The vast majority of problems relate to usage with a particular product and not the Power Doser
™
itself. Is the product
“
thick
”
or “thin”, “oily” or “watery”, “harsh” or “kind”
? Quite often the
solution will relate to the suction hose.
Problem
Solution
i.
The piston rod will not return
fully or quickly enough.
a)
Has the gun been lubricated with oil? Re-lubricate plunger O-ring
with Genesis Power Lube or petroleum jelly. See v) in section A
(pg. 8).
b)
Is it the correct suction hose for that chemical? See section C
(pg. 10).
c)
Elevate drum for gravity assistance, eg, place on 44 gallon drum.
d)
Possibly main spring worn, stretch one centimeter and/or insert a
spacer.
e)
Suction hose may have restriction, eg, small diameter draw off
system to large hose or a sieve was inserted that is restrictive.
f)
Is there an air/gas leak impeding return of piston rod? If it is, stop
leak by cleaning trigger, or replace it.
g)
Has the piston rod head swollen from a particular chemical and
jammed in the barrel? Take plunger O-ring off to test. If jamming,
obtain replacement piston rod.
ii.
The piston rod returns but air
is in the barrel.
a)
Front valve not seating properly. Screw off nozzle and clear any
obstructions. Check if outlet check is worn or shrunken from
chemical, replace from spare parts kit if necessary.
b)
Check where suction hose fits on inlet nozzle, may be worn and lets
air in. Cut off one centimeter of hose and refit (avoid using a clamp
or wire because of the shape of the nozzle).
c)
Check suction hose to chemical, ensure no air is getting in.
iii.
The guns “spits”.
The refill is too quick. Often the operator sees this when testing with
water and the problem disappears when a chemical is used. For thin
chemicals do one of the following:
a)
Check if outlet check and spring are worn. Replace if necessary.
b)
Insert an inlet nozzle reducer to slow the refill.
c)
Double up front valve spring with spare from spare parts kit.
d)
Use thin suction hose or tie suction hose to slow the flow.
e)
Ensure chemical drum is lower than the level of the application
surface.
