Troubleshooting - caprari MEC-D Serie Instrucciones De Servicio

9

TROUBLESHOOTING

Faults
1. The unit fails to start.
2. The unit absorbs
excessive power.
3. The unit delivers a very
4. Although it operates,
absolutely no water is
delivered by the unit.
5. The unit is noisy and
vibrates.
6. The unit fails to
automatically stop.
7. The hydraulic seal on the
shaft drips too much.
Caprari S.p.A.
SALES NETWORK and LIST OF ASSISTANCE CENTERS available in www.caprari.com
Probable causes
1.1. The tractor is not being powered.
1.2. The automatic monitoring devices of the system
or tractor are not enabling operation.
2.1. Excessive rotation speed.
2.2. The unit is not free to turn owing to friction
points.
2.3. The packing gland is too tight.
3.1. Air enters through the suction port.
3.2. The check valve or foot valve has jammed in a
partially closed position.
3.3. Worn pump.
3.4. Partially closed sluice valve.
3.5. The pump operates at cavitation rate.
3.6. Strainer clogged by foreign bodies.
3.7. Excessively low rotation speed.
4.3. The check valve or foot valve has jammed in a
closed position.
4.4. Sluice valve closed.
4.5. Excessively worn pump.
4.6. Strainer clogged by foreign bodies.
4.7. Excessively low rotation speed.
5.1. System incorrectly installed.
5.2. Water containing a high percentage of gas.
5.3. Worn pump rotor.
5.4. Incorrect assembly of parts or system incorrectly
installed.
5.5. Pump operating at cavitation rate.
5.6. Excessive stress transmitted by the pipes to the
pump casing.
6.1. The automatic monitoring devices of the system
or tractor fail to enable the unit to stop.
7.1. The packing gland has been badly adjusted.
MEC-D / MEC-DMR / BHD
Remedies
1.1. Make sure that there is fuel.
1.2. Wait until the correct operative conditions have
automatic devices.
2.1. Regulate the internal combustion engine.
2.2. Send the unit to an authorized after-sales
service centre.
2.3. Adjust the packing gland by evenly working on
both nuts in order to ensure a slight drip during
operation.
by means of the sluice valve on the delivery
pipe.
3.1. Increase the level of the liquid at the suction
port and/or shut off any air inlets.
3.2. Disassemble the valve from the pipe and
check.
3.3. Send the pump to an authorized after-sales
service centre.
3.4. Open the sluice valve.
3.5. Reduce the load losses on the suction part or
increase the level of the liquid at the suction
port or reduce the difference in level.
3.6. Remove the clogging substances.
3.7. Regulate the internal combustion engine.
4.1. See 3.1.
4.2. Make sure that the right product has been
sluice valve on the delivery pipe.
4.3. See 3.2.
4.4. Regulate the sluice valve.
4.5. See 3.3.
4.6. See 3.6.
4.7. See 3.7.
5.1. See 3.1.
5.2. See 3.1.
5.3. See 3.3.
5.4. Improve the alignment between pump and
paragraph 5.3 "Mechanical connections".
5.5. See 3.5.
5.6. Check the maximum stress values given in the
"Flange stress" table in chapter 10 "Technical
data".
6.1. See 1.2.
7.1. Adjust the packing gland as indicated in
paragraph 6.2 "Running and inspections".
7.2. Consult paragraph 6.3 "Maintenance" for the
relative procedure.
GB
15