Jacto ARBUS 1000 Operator's Manual page 123

ARBUS 1000
Table 17: Intermittence
Probable causes
1. Filter valve closed (quick shut-off).
2. Pump – poor operation of valves.
3. Pump head punctured on the inside. Replace pump head.
Table 18: Insufficient pressure (partial lack of pressure)
Probable causes
1. Poor rpm on machine drive.
2. Closed filter valve (quick shut-off).
3. Filter is partially clogged.
4. Intake hose is partially clogged.
5. Air intake.
6. Pressure regulator.
7. Excess flow (nozzle flow in excess of
the recommended limit).
8. Pump with less boosting capability.
Indications and corrections
Due to the quick shut-off valve construction charac-
teristic, there will be circulation of liquid even in the
closed position with the pump in operation, causing
intermittent circulation of liquid.
Valve exhibiting poor sealing due to impurities or seizing.
Indications and corrections
Rpm for driving the machine shall be 540 rpm at the
power take-off (TDP).
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 filter must be clean to allow free circulation of liquid.
The pump if not properly fed will cause a pressure drop.
Check the hose connecting the filter to the pump for
buckling.
Check for obstruction the hoses connecting the reser-
voir to the filter. Fill up the reservoir, open the valve
and check whether the water is flowing abundantly.
Check fittings and reservoir outlet sealing rings.
Check valve seating and seat.
Check whether the nozzle flow rate is within the rec-
ommended limits (refer to flow rate chart). Replace
nozzles with flow rate in excess of 20%.
Use only the nozzle recommended by the manufac-
turer sprayer.
Disconnect the pressure hose from the command.
Run the machine under 540 rpm at the PTO. Collect
water for 1 minute. Meter the collected volume. The
volume must be close to the pump rated value.
JP - 402 = 40 L /min
JP - 42 = 42 L /min
JP - 50 = 50 L/min
JP - 75 = 75 L /min
JP - 100 = 100 L /min
JP - 150 = 150 L /min
JP - 300 = 300 L /min
Trouble-shooting
5
5-123