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10. TROUBLESHOOTING TABLE
This table facilitates identification of the cause of the defect. The manufacturer recommends that the technical service department
is contacted in good time, to obtain instructions for operating and/or adjusting in condition of maximum safety.
RAVAGLIOLI S.p.A. will not accept any responsibility for damage to people, animals and objects caused by manoeuvres by
unauthorised and unqualified personnel.
10.1 Hydraulic wheel free jacks
PROBLEMS
The pump works but
does not send oil.
The crosspiece works
unloaded but not when
loaded.
The pump reaches
maximum pressure but
does not remain under
pressure.
10.2 Pneumohydraulic wheel free jacks
PROBLEMS
The pump does not start
or stops during the
operation (before reaching
the maximum pressure).
The pump works but does
not send oil
Low capacity
The pump does not reach
the maximum pressure.
The pump reaches the
maximum pressure but
does remain under
pressure.
Excessive oil leaks from
the air drainage.
Oil tank gets up to
pressure with air and oil
leaks from the valve.
Pump continues to pump
even after the pedal has
been released.
After a period of disuse,
the pump does not start.
40
CAUSES
a) Low oil level.
a)
Load limit exceed on the crosspiece.
Piston gaskets damaged.
b)
c)
Inefficient seal on the maximum valve.
a)
Check hydraulic couplings.
Check the delivery valve ball bearing.
b)
c)
Oil leak from connected equipment.
CAUSES
Return spring broken
a)
Air loss, check the piston seal
b)
a)
Oil level low
Pump does not prime
b)
a)
Tank not ventilated
Insufficient air capacity
b)
c)
Hydraulic causes:
- Check that the oil filter is not blocked
- Air in the hydraulic circuit
- Check that the ball of the suction valve
works properly
Check the air pressure
a)
b)
Valve or gaskets faulty or dirty
Check hydraulic connections
a)
Dirt under the pedal
b)
c)
The ball of the delivery valve
Leakage on the apparatus connected
d)
a) Gaskets faulty
a)
Air leakage from the gaskets
b
Tank too full of oil
a)
Gaskets faulty
b)
Air valve spring broken or too weak
a) Gaskets faulty
0434-M001-0
REMEDIES
a) Top up oil level.
a)
Check.
Replace gaskets.
b)
c)
Contact authorised technical services.
a)
Tighten if necessary.
Clean or replace.
b)
c)
Repair and check sealings.
REMEDIES
Replace
a)
Replace if faulty
b)
a)
Top up oil
Operate the pedal in the "RELEASE area
b)
at the same time as the air valve to start
the motor.
- Bleed the air out
- Pressurize the tank
CAUTION
Max. pressure 0.5 Bar (7 P.S.I.)
- Remove and clean
a)
Ventilate tank through the screw on the
plug
Capacity should be 250 Lt/minute
b)
c)
- Clean or replace
- Bleed air from the circuit
- If necessary add a copper washer or
replace coupling if the housing is worn.
7 bar (100 P.S.I.) is required
a)
b)
Clean or replace
Tighten if necessary
a)
Clean
b)
c)
Replace gaskets
Repair and check seal
d)
a) Replace
a)
Replace gaskets
b)
Check the level
a)
Replace
b)
Replace
a) Replace
J30
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