Jacto ARBUS 400 - Trouble-Shooting

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MAINTENANCE
ARBUS 400
Table 11: Suction and boost deficiency (total lack of pressure)
Table 12: Pressure oscillation
Trouble-shooting
Probable causes Indications and corrections
1. Complete absence of power take-o
revolution.
The machine shall be driven with the power take-o
(PTO) running at 540 rpm.
Visually check whether the pump is being driven.
2. Water missing on reservoir.
A minimum liquid is required for the chemical cir-
cuit operation; otherwise there will be no pressure.
3. Filter valve closed (quick shut-o)
Due to the quick shut-o valve construction char-
acteristic, liquid will ow even in the shut position
with the p ump operating; however, the circulation
of liquid will be insucient.
4. Dirty lter.
The dirty lter will prevent free uid ow.
Clean the lter at the time of every rell or more
frequently depending on the water quality and type
of chemical.
5. Obstruction in intake hoses.
Check the hose connecting the lter to the pump for
buckling.
Check for obstruction inside the hoses connecting
the reservoir to the lter. Fill the reservoir, open the
valve and check whether there is plenty of water
circulating.
6. Air intake.
Check the lter sealing ring.
The lter sealing must be correct, with no leaks.
7. Pump is not suctioning.
Remove the suction valve cover.
Check the repair condition of valves and, if neces-
sary, replace.
Probable causes Indications and corrections
1. Slack belts.
Incorrectly taut belts will not drive the pump prop-
erly.
2. Entry of air into the intake system.
Caused by a punctured hose, damaged lter sealing
ring, etc.
Check and mend liquid leaks if existing.
3. Pressure regulator.
Check the valve and valve seat to make sure of the
proper adjustment of these components.