Fault Finding; Machine Lowers On Its Own; Machine Will Not Raise To Maximum Height; Machine Does Not Raise With The First Pump Stroke - Ravaglioli Master Gear 1,0 Mode D'emploi

127640 02/2019
Operating Instruction

Fault Finding

8 Fault Finding
Danger
Work on the hydraulic components
should only be carried out by a quali-
fied tradesman.
Observe the safety instructions.
Breather bung
Foot pedal
Lowering pedal
Fig. 11:

8.1 Machine lowers on its own

Adjust the lowering valve by following this
procedure
Loosen the M8 grub screw.
Leave the lowering pedal in its normal
position.
Using a screwdriver slightly adjust the
valve spindle:
• Anticlockwise, to raise the lowering
speed.
• Clockwise, to reduce the lowering
speed and to ensure that the pump
holds the load in position.
Lightly tighten the grub screw after every
adjustment.
When adjustment is correct fully tighten
the grub screw.
8.2 Machine will not raise to max-
imum height
Check oil level (see 7.4)
8.3 Machine does not raise with the
first pump stroke
Depress the lowering pedal with the right
hand and at the same time quickly pump
the foot pedal with the left hand.

8.4 Pump produces no pressure

Remove the breather bung.
Lay a clean cloth (twice folded) over the
opening.
Using a compressed air pistol pressurise
M8 grub screw
the tank and at the same time quickly
pump the foot pedal.
Lowering spindle
8.5 Breakdown / Maintenance of the
valves
The valves used normally require no mainte-
nance. By malfunction of the pump observe
positions 1-4 in the "fault finding".
Should it be found that the positions 1-4 in
"fault finding" produce no cure return the
pump for repair.
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