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8. TROUBLESHOOTING

The following diagnostic table indicates the main anomalies which may be encountered, the probable causes and

possible solutions. If you cannot solve the problem, do not attempt to disassemble the unit, but contact the

Engineering Department of DROPSA S.p.A.

NOMALY

Motor does not

operate

Pump does not

deliver lubricant

Pump operates but

does not deliver

lubricant to the

bearing- points

NOMALY

Lubricant reaches the

bearing-points in

incorrect quantities

Pump starts

lubricating but stops

immediately

Irregular flow rate

The system doesn't

reach the pressure

AUSE

Power supply failure

Ratiomotor does not operate

Reservoir is empty

Air-bubbles in lubricant

Obstructed suction pipe-line

Disconnected piping

Blocked progressive

distributor

AUSE

The distributor is not

correctly connected to the

bearing-points.

Delivery is not correct (only

for adjustable delivery pump

unit).

Faulty motor or high output

consumption.

Screw C, which secures the

pump element D and return

spring E, is loose (only for

adjustable delivery pump

unit).

Delivery valve dirty.

Delivery valve damaged.

Spring broken

Verify power supply system, and check the fuse

Replace the ratiomotor

Refill the tank with clean lubricant,

Disconnect main piping from pumping element fitting.

Operate the pump in the manual mode until lubricant

free of air-bubbles comes out of the fittings

Disassemble the pumping unit and clear the suction

pipe-line

Inspect piping and replace the wear pipes

Clear the distributor. Replace it, if necessary

Verify that the dosages are those indicated in the

system diagram

Adjust delivery by means of regulation screw

Allow the pump being cooled for a few minutes and try

again. If the problem still continues, contact the

Customer Service

Remove the pump element assembly from the pump

body and completely disassemble it.

To reassemble the pump element assembly see the

sequence in the diagram.

Check and clean all pump unit parts. Verify the

component integrity.

Warning: put some Loctite type sealant on screw C,

which is inserted into pump element D. Hold the pump

element between wooden vice clamps to prevent

damage to the lapped surface. Lock up very well the

element B.

Dismount the valve A, clean it and mount following the

showed sequence.

Replace the pumping unit.

EMEDY