Farmi Forest Corporation 4067 Operation, Maintenance And Spare Parts Manual page 25

PRESSURE MEASUREMENT
Always make the adjustments with the manometer in
place.
• The main pressure is measured from the measuring
point in the control valve's inlet section.
• Adjustments and inspections for each movement:
• Set the main pressure relief valve to 5 bar
above the value set for the protective valve.
• Perform the movement, and check and adjust
the pressure if necessary.
• Finish by adjusting the main pressure to the set
value.
• Pressure measurements are to be performed at the
normal operating temperature and at the normal
flow rate.
• The free flow pressure can be read from the ma-
nometer when the flow of oil is directed through
the valve.
REPAIR WELDING
If welding is required for modifying or repairing the
crane, note the following:
• The welder must be qualified: welding grade 3. The-
re must be no root defects.
• Remove paint and any oil from the location to be
welded.
• Connect the ground terminal directly to the piece
to be welded – there must be no joints in between.
• Use OK 48.00 or equivalent electrodes. The
electrodes must be dry.
• Improperly welded structures can get fractured.
FARMI 4067
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