Possible Problems And Solutions - Urrea 2469 Manual De Usuario Y Garantía

reach the tank. The cover is threaded on its
upper part.
IMPORTANT: AN EXCESS OF OIL MAY
AFFECT THE OPERATION OF THE HYDRAULIC
UNIT.
5. Only use hydraulic oil, HL or HM type, with
an ISO grade of cinematic viscosity of 30cSt
at 40ºC or of an Engler viscosity of 3 at 50ºC.
IMPORTANT: NEVER USE BRAKE FLUID.
6. A frequent inspection should examine:
• Wear on the piston, cylinder, pump,
accessories or incorrect connections.
• Oil leaks, signs of corrosion.
• Damage to the structure, accessories, table
and supports, lost screws or plug-ins.

POSSIBLE PROBLEMS AND SOLUTIONS

Problem
The piston does not
lift.
Piston does not lift
totally.
Piston lifts very
slowly.
Cylinder looses pres-
sure while holding
the load.
Oil leakage.
Piston does not
retract fully.
Cause
Release valve is opened.
Air in hydraulic circuit.
Low oil level.
Dirt in hydraulic circuit.
Non-correct hydraulic connection. Assure hydraulic connection is
Deformed piston.
Low oil level.
Deformed piston.
Air in the hydraulic circuit.
Dirt in hydraulic circuit.
Air in the hydraulic circuit.
Dirt in hydraulic circuit.
Worn or damaged seals.
Worn or damaged seals.
Non correct hydraulic connection. Assure hydraulic connection is
Excess of oil.
Deformed piston.
Dirt in hydraulic circuit.
Damaged return spring.
Release valve closed.
REPAIR
Both the maintenance and repair of these
presses should be carried out by qualified
personnel, who as a result of their training
and experience are familiar with the hydraulic
systems used.
TO PURGE THE HYDRAULIC CIRCUIT:
• Open the release valve by turning it to the
left.
• As follows, pump the hydraulic unit several
times.
• Lastly, close the release valve by turning it
completely to the right.
Solution
Close release valve.
Purge the circuit.
Refill with required volume.
Clean hydraulic circuit.
correct.
Contact your distributor.
Refill.
Contact your distributor.
Purge hydraulic circuit.
Clean hydraulic circuit.
Purge the hydraulic circuit.
Clean hydraulic circuit.
Contact your distributor.
Contact your distributor.
correct.
Remove excess of oil.
Contact your distributor.
Clean hydraulic circuit.
Contact your distributor.
Open the release valve.
E N G L I S H
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