CHECKING THE VANES WEAR
• Unscrew the vanes wear check-plug on the housing.
• Turn the shaft until you see the vane.
• The vanes should slide to the bottom of the seat due to
gravity: check they really do.
Replace the vanes when their wear exceeds 10
mm (L – L min): they may break. Replace all
vanes at the same time.
CHECKING THE GEAR BOX OIL LEVEL
Check the level when the pump is cooled: it must almost reach
the threaded port. Refill if necessary.
For a complete replacement, 0.7 litres are required. Use mineral
oil with EP additives for gears and transmissions.
Recommended lubricants
Viscosity Type
AGIP ESSO SHELL ELF MOBIL BP
ISO
VG 220
EP mineral oil
BLASIA
220
SPARTAN EP
220
OMALA OIL
220
REDUCTELF
SP 220
MOBILGEAR
630
ENERGOL GR
XP 220
Dispose of exhausted oil as
provided by current specification.
When changing the oil, also replace the outlet plug washer.
Before starting any extraordinary maintenance operation, be sure the pump stands still and
follow the safety prescriptions as described in paragraph “Safety and accidents prevention”.
ADJUSTING THE 4-WAY VALVE
For pumps equipped with handle for manual
operation or hydraulic actuator.
Adjust the screws to avoid the valve blocking
in its seat.
Do not exceed with the adjustment:
possible vacuum loss.
For pumps equipped with changeover valve
with hydraulic actuator: see the integrated
part at the end of these instructions.
12. EXTRAORDINARY MAINTENANCE
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