Jacto ARBUS 1000 Operator's Manual page 122

Trouble-shooting
5
Table 15: Suction and boost deficiency (total lack of pressure)
Probable causes
1. Complete absence of power take-off
revolution.
2. Water missing on reservoir.
3. Filter valve closed (quick shut-off)
4. Dirty filter.
5. Obstruction in intake hoses.
6. Air intake.
7. Pump is not suctioning.
Table 16: Pressure oscillation
Probable causes
1. Slack belts.
2. Entry of air into the intake system.
3. Pressure regulator.
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Indications and corrections
The machine shall be driven with the power take-off
(PTO) running at 540 rpm.
Visually check whether the pump is being driven.
A minimum liquid is required for the chemical circuit
operation; otherwise there will be no pressure.
Due to the quick shut-off valve construction charac-
teristic, liquid will flow even in the shut position with
the p ump operating; however, the circulation of liq-
uid will be insufficient.
The dirty filter will prevent free fluid flow. Clean the
filter at the time of every refill or more frequently de-
pending on the water quality and type of chemical.
Check the hose connecting the filter to the pump for
buckling.Check for obstruction inside the hoses con-
necting the reservoir to the filter. Fill the reservoir,
open the valve and check whether there is plenty of
water circulating.
Check the filter sealing ring.
The filter sealing must be correct, with no leaks.
Remove the suction valve cover.Check the repair con-
dition of valves and, if necessary, replace.
Indications and corrections
Incorrectly taut belts will not drive the pump properly.
Caused by a punctured hose, damaged filter sealing
ring, etc.
Check and mend liquid leaks if existing.
Check the valve and valve seat to make sure of the
proper adjustment of these components.
ARBUS 1000