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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.
The manufacturer 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 jack
PROBLEMS
The pump works but does
not deliver oil.
The wheel free jack works
unloaded but not when
loaded.
The pump reaches
maximum pressure but
does not remain under
pressure.
10.2
Pneumatic-hydraulic wheel free jack
PROBLEMS
The pump does not start or
stops during the operation
(before reaching the
maximum pressure).
The pump works but does
not deliver oil.
Low capacity.
The pump does not reach
the maximum pressure.
The pump reaches the
maximum pressure but
does not 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.
38
CAUSES
a)
Low oil level.
Excessive oil on the jack.
a)
b)
Piston gaskets damaged.
c)
Inefficient seal on the maximum
pressure 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)
Oil level low.
a)
Pump does not prime.
b)
Tank not ventilated.
a)
Insufficient air capacity
b)
Hydraulic causes:
c)
- Check that the oil filter is not blocked.
- Air in the hydraulic circuit.
- Check that the ball of the suction valve
works properly.
a)
Check the air pressure.
b)
Valve or gaskets faulty or dirty.
a)
Check hydraulic connections.
b)
Dirt under the pedal.
c)
The ball of the delivery valve.
d)
Leakage on the apparatus connected.
a) Gaskets faulty.
a)
Air leakage from the gaskets.
b
Tank too full of oil.
Gaskets faulty.
a)
b)
Air valve spring broken or too weak.
a) Gaskets faulty.
a)
a)
b)
c)
a)
b)
c)
a)
b)
a)
b)
a)
b)
c)
a)
b)
a)
b)
c)
d)
a) Replace.
a)
b)
a)
b)
a) Replace.
0423-M001-2
REMEDIES
Top up oil level.
Check.
Replace gaskets.
Contact authorised technical services.
Tighten if necessary.
Clean or replace.
Repair and check seal.
REMEDIES
Replace.
Replace if faulty.
Top up oil.
Operate the pedal in the "RELEASE area 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.
Ventilate tank through the screw on the plug.
Capacity should be 250 Lt/minute.
- 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.
Clean or replace.
Tighten if necessary.
Clean.
Replace gaskets.
Repair and check seal.
Replace gaskets.
Check the level.
Replace.
Replace.
J17
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