DROPSA 999540 User And Maintenance Manual - Page 7
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8. TROUBLESHOOTING
ANOMALY
The pump does
The tank is empty
not
deliver
lubricant
The tank has been filled
from
through
connection fitted with a
filter.
The piston of the pump
element
seized
return spring is broken
The
function
grease being used is of a
consistency greater than
NLGI
recommenced
consistency).
The
function because it has
been run with the tank
empty creating an air lock
inside the pump itself.
Irregular pressure Pump
valve and seating dirty.
Pressure regulating valve
(by-pass) dirty.
DIAGNOSTIC TABLE
CAUSE
Warning: if the tank has emptied without the minimum level electrical
contact having signalled the minimum level, check the contact.
above
and
not
the
side
assembly
is
or
the
piston
pump
does
not
because
the
Disassemble the pump element and wash out with petrol. Reassemble
completely, refill the tank (utilising the side connection fitted with a
3
(max.
filter) wit suitable grease and run the pump, ensuring that grease free
from air bubbles exits. If necessary, remove the air vent plug B (see
fig. on page 6) and proceed as in the previous point.
pump
fails
to
Replace the plug (or the pump element) and continue running the
pump until grease exits free from air bubbles. If necessary, remove
the air vent plug B (see fig. on page 6) and proceed as indicated
above.
element
return
Check the condition of the components and replace if necessary.
Valve Part N°
299450
299451
299452
Before reassembling the valve, check that the ring seal 18818 has not
been damaged.
Refill the tank with clean lubricant, in accordance with the
procedure shown in the Maintenance section.
Remove the air vent plug B (see fig. on page 6) and run the
pump allowing the grease to exit until free from air bubbles.
Replace and partly screw in plug B and continue running the
pump until grease exits between the threads and the plug
and then fully tighten the vent plug.
Replace the pump element.
Remove the tank from the pump, remove the unsuitable
grease and wash out the tank and filter with petrol.
Remove the plug which closes the auxiliary pump element
outlet or, where the pump has two elements fitted, remove
one of the two pump elements and run the pump until
homogeneous grease exits.
Disassemble the parts shown in diagram A (see fig. on page
6) and wash them in petrol. Also clean the valve seating.
Check the condition of the components and replace if
necessary.
Disassemble the parts of the valve shown in the diagram and
wash them in petrol. Also clean the valve seating.
Spring part N°
299456
299457
299458
REMEDY
Pressure reg.
0 - 250 Bar
0 - 350 Bar
0 - 450 Bar
7