Maintenance - Makita GM series Instruction Manual And Safety Instructions

On pressure reducers equipped with a pressure gauge, pressure can
be seen on the gauge itself.
WARNING: Some pressure regulators do not have "push to lock",
therefore simply turn the knob to adjust the pressure.

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. 24).
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.
In the "red-head" models (fig. 25) (TR200 – TR255), the suction filter is
located internally under the conveying cover (read-head). Unscrew the
three cover securing screws, remove the cover from the guard joint,
remove the filter from its seat, and begin cleaning, blowing compressed
air in opposite to normal flow direction.
In the Silent model, the filtering element can be replaced by taking off
the soundproofing cabinet and proceeding in the same way as for the
AB models (fig.29A).
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. 26) 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 synthetic oil "FIAC Oil Synthesis".
We recommend a full change of oil in the pumping element within the
first 100 hours of duty.
The soundproofing cabinet is to be taken off first in the Silent model
(fig.29A).
Unscrew the oil drain plug on the housing cover, allow all the oil to flow
out, and re-screw the plug (fig. 27 - 28).
Pour oil into the upper hole of the housing cover (fig. 29 - 30) until it
reaches the level indicated on the stick (fig. 9) or indicator (fig. 11)
Pour oil into the upper hole of the head (fig. 30) in belt assisted units
designed for topping up in that area.
For the GM203 series, take the cap off and pour in 85 grams of oil
directly from the bottle (see fig. 30a).
Once a week: check oil level of the pumping element (fig. 11) and see if
it needs topping up.
For 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
FIAC Oil Synthesis...................................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
21
Loss of air in valve under pressure switch
This trouble depends on poor tightness of the check valve – take
the following action (fig. 31):
– 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. 32)
- this may be due to failure of the valves (C1 – C2) or of a seal (B1 –
- this may be due to failure of the valves F1 and F2 or of a seal (D1 –
GM 203 compressors:
- 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. 14)
- Are power cable extensions of adequate diameter or length?
- Is the work environment too cold? (under 0°C)
- For series VX/AB: was the thermal-breaker tripped? (fig. 20); in the
- Is there oil in the housing to ensure lubrication? (fig. 11)
- Is power supplied to the electrical line? (sockets well connected,
Compressor not stopping
- If the compressor does not stop when maximum pressure is reached,
- Do not on any account unscrew any connection while the tank is
- Do not drill holes, weld or purposely deform the compressed air tank.
- Do not do any jobs on the compressor unless you have disconnected
- 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. 34)
- Do not transport the compressor while the tank is pressurised.
- Be careful with regard to some parts of the compressor such as the
- Transport the compressor, lifting or pulling it with the appropriate grips
HOURS OF DUTY
- Keep children and animals well away from the machine operating
- If using the compressor for painting:
- If the electrical cable or plug are damaged, do not use the compressor
WHAT TO DO IF SMALL MALFUNCTIONS OCCUR
B2): replace the damaged part.
Pulley drive compressors: (fig. 33)
D2): replace the damaged part.
This may be due to the breakage of the valves (C1 - C2) or of the
gasket (B1). Replace the damaged part (fig. 16A).
silent series (fig. 21)
thermal- breaker, fuses in good condition).
the tank safety valve comes into operation. To repair the valve, contact
your nearest service centre.
IMPORTANT
pressurised – always check if the tank is pressure free.
the power plug.
head and delivery tubes, as they can reach high temperatures. Do
not touch these parts to avoid burns.(fig. 18 - 19)
or handles (fig. 4 - 6)
area.
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. 35)
and contact an authorised service centre to replace the faulty element
with an original spare part.
GB