Michelin MB Manual De Uso página 20

MAINTENANCE
Before attempting any maintenance jobs on the compressor, make
sure of the following:
– Master power switch in position "0".
– Pressure switch and the control unit switches all off, in position "0".
– No pressure in the air tank.
Every 50 hours of duty: we advise you to dismantle the suction filter
and clean the filtering element by blowing compressed air on it
(fig. 18). You are recommended to replace the filter element at least
once if the compressor operates in a clean environment, but more
frequently if in a dusty environment.
The compressor generates condensate water which accumulates in
the tank. The condensate in the tank must be drained at least once
a week, by opening the drain tap (fig. 19 under the tank. Take care if
there is compressed air inside the cylinder, and water could flow out
with considerable force.
Recommended pressure: 1 ÷ 2 bar max. Condensate of compressors
that are oil lubricated must not be drained into the sewer or dispersed
in the environment as it contains oil.
OIL CHANGES – TOPPING UP WITH OIL
The compressor is filled with oil "GSP High-Performance".
We recommend a full change of oil in the pumping element within
the first 100 hours of duty.
Unscrew the oil drain plug on the housing cover, allow all the oil to
flow out, and re-screw the plug (fig. 20A).Pour oil into the upper hole
of the housing cover (fig. 20B) until it reaches the level indicated on
the stick or indicator.
Once a week check oil level of the pumping element (fig.8/9) and see
if it needs topping up.
or operation at ambient temperature in the range -5°C to +40°C,
use synthetic oil. The advantage of this oil is that is does not lose its
characteristics either in winter or summer. Do not drain used oil into
the sewer or dispose of it in the environment.
OBSERVE THIS TABLE FOR OIL CHANGES
TYPE OF OIL
GSP High-Performance..........................................500
Synthetic oil:
AGIP Sint 2000 Evolution - BP Visco 5000 - ESSO Ultron
-MOBIL Mobil 1 - NILS Dimension S - NUOVA STILMOIL
Arrow5W50)............................................400
Other types of oil: mineral multigrade
SAE 15 W40...........................................100
WHAT TO DO IF SMALL MALFUNCTIONS OCCUR
Loss of air in valve under pressure switch
This trouble depends on poor tightness of the check valve – take the
following action (fig. 21):
– Discharge all pressure from the tank
- Unscrew the hexagon-head of the valve (A)
- Carefully clean both the rubber disk (B) and its seat.
- Refit all parts accurately.
Air losses
These can be caused by poor tightness of a union – check all unions,
wetting them with soapy water.
Compressor turns but does not load
Coaxial compressors: (fig. 22)
- this may be due to failure of the valves (C) or of a seal (B): replace
the damaged part.
Pulley drive compressors: (fig. 32)
- this may be due to failure of the valves (F) or of a seal (D): replace
the damaged part.
- Check if there is too much condensate water inside the tank.
Compressor no starting
If the compressor has trouble starting, check the following :
- Does mains power match that of the data-plate? (fig. 11)
- Are power cable extensions of adequate diameter or length?
- Is the work environment too cold? (under 0°C)
- Was the thermal-breaker tripped?
- Is there oil in the housing to ensure lubrication?
- Is power supplied to the electrical line (sockets well connected,
thermal- breaker, fuses in good condition).
Compressor not stopping
- If the compressor does not stop when maximum pressure is
reached, the tank safety valve comes into operation. To repair the
valve, contact your nearest service centre.
- Do not on any account unscrew any connection while the tank is
pressurised always check if the tank is pressure free.
- Do not drill holes, weld or purposely deform the compressed air
tank.
- Do not do any jobs on the compressor unless you have disconnected
the power plug.
- Temperature in operating ambient: 0°C +35°C.
- Do not aim jets of water or inflammable liquids on the compressor.
- Do not place inflammable objects near the compressor.
- During down-times, turn the pressure switch to position "0" (OFF).
- Never aim the air jet at people or animals (fig.24)
- Do not transport the compressor while the tank is pressurised.
- Be careful with regard to some parts of the compressor such as the
head and delivery tubes, as they can reach high temperatures. Do not
touch these parts to avoid burns.(fig. 14)
- Transport the compressor, lifting or pulling it with the appropriate
grips or handles.
- Keep children and animals well away from the machine operating
area.
- If using the compressor for painting:
a) Do not work in closed environments or near to naked flames;
b) Make sure there is adequate exchange of air at the place of work;
c) Protect your nose and mouth with an appropriate mask. (fig. 24)
- If the electrical cable or plug are damaged, do not use the compressor
and contact an authorised service centre to replace the faulty element
with an original spare part.
- If the compressor is located on a shelf or on a top above floor height,
HOURS OF DUTY
it must be secured to prevent it falling while in operation.
- Do not put objects or your hands inside the protective grilles to avoid
injury to yourself or damaging the compressor.
- Do not use the compressor as a blunt object toward things or
animals, to avoid serious damage.
- When you have finished using the compressor, always remove the
plug from the power socket.
ELECTRO-COMPRESSOR DIRECT DRIVE
Maximum operating pressure 8.5 bar
Minimum operating pressure 8 bar
ELECTRO-COMPRESSOR BELT DRIVE
Maximum operating pressure 10.5 bar
Minimum operating pressure 10 bar
ALWAYS CHECK DATA LABEL
N.B. Two-stage compressors can be supplied on request for use up
to 14 bar. In this case:
Maximum operating pressure 14.75 bar
Minimum operating pressure 14 bar
NOTE: For the European market, the compressor tanks are
manufactured to meet Directive CE2009/105. For the European
market, the compressors are manufactured to meet Directive
CE2006/42.
Acoustic pressure measured free-field at a distance of 4m: ±3dB(A)
at maximum operating pressure. (tab. 3)
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IMPORTANT