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Pump Troubleshooting
The troubleshooting information is provided
as a reference when your sprayer is not
functioning correctly.
To ensure that you receive the best possible
service, it is recommended that you exhaust
all applicable troubleshooting solutions shown
prior to calling your dealer, or Goldacres, for
service advice.
Problem
Common Causes
Common Solution
Pressure and flow rate
are too low
Excessive bypass on regulator Check regulator setting on pump.
Supply to pump is restricted
Suction filter may be blocked
Check tank sump and suction line
blockages
Check suction line for air leaks
Check pump speed
Check oil for colour change. If the oil
appears milky, a diaphragm will be
damaged and needs to be replaced.
Check valves in pump.
Pressure and flow rate
are too high
Bypass from regulator is
restricted or blocked
Check for restriction in bypass
Adjust pump speed, close to, but no
higher than 540 rpm (3250 rpm engine).
The pressure on
my gauge is higher
than the nozzle flow
indicates
Blocked filter or nozzle
Check and clean pressure line, fittings
and nozzle
Flow loss due to resistance in
lines, fittings and/or nozzle.
The flow rate is correct
but my pressure is too
low or high.
Spray gun nozzle
Check nozzle on spray gun for type
and fitment
Pressure fluctuation
Air leak on suction side of pump Check suction pump for air leaks
Incorrect pump speed
Adjust pump speed, close to, but no
higher than 540 rpm (3250 rpm engine).
Faulty pump valves
Replace pump valves
Pump pressure
pulsating
Air accumulator pressure is
incorrect
Add or remove air in accumulator as
necessary
Air accumulator diaphragm has
a leak
Replace air accumulator diaphragm
Pump speed too low
Adjust pump speed, close to, but no
higher than 540 rpm (3250 rpm engine).
Air leak on suction side of pump Check pump suction for air leaks
Pump oil becoming
black or dark grey
Pump is overheating
Check pump speed and oil level
Pump is noisy
Low oil level
Refill or replace oil
Air accumulator pressure set
incorrectly
Recharge air accumulator to specified
pressure
Insufficient lubrication
Replace all bearings
Damaged pump valves
Replace pump valves
Pump suction line has air leak
or is restricted
Clean suction filter and check for leaks
in suction lines
Pump housing or
mountings cracked
Extremely cold weather can
cause liquid in the pump to
freeze and expand
Water should be removed from the
pump when storing in very cold
environments
