Fayat BOMAG BC 462 RB, Service Manual, Page: 12 / 41

1.2
Safety regulations
BOMAG 12 008 917 13
Engine
!
Danger
Do not work on the fuel system while the engine is
running. (Danger to life!)
Once the engine has stopped wait approx. 5 min-
utes for the system to depressurize. The systems
are under high pressure. (Danger to life!)
Keep out of the danger zone during the initial test
rung. Danger caused by high pressure in case of
leaks. (Danger to life!)
When performing work on the fuel system make
sure that the engine cannot be started uninten-
tionally during repair work. (Danger to life!)
l
Maintenance and cleaning work on the engine must
only be performed with the engine stopped and
cooled down. Make sure that the electric system is
switched off and sufficiently secured against being
switched on again (e.g. pull off ignition key, attach a
warning label).
l
Observe the accident prevention regulations for
electric systems (e.g. -VDE-0100/-0101/-0104/-
0105 Electric precautions against dangerous con-
tact voltages).
l
Cover all electric components properly before wet
cleaning.
Air conditioning system
!
Caution
Work on air conditioning systems must only be
carried out by persons who can provide sufficient
evidence of their ability (proof of professionalism)
and only with the appropriate technical equip-
ment.
l
Always wear goggles and protective clothing when
performing maintenance and repair work on air con-
ditioning systems. Refrigerant withdraws heat from
the environment when evaporating, which can
cause injury by freezing when in contact with skin
(boiling point of R134a -26,5 °C at normal pres-
sure).
l
Perform maintenance and repair work on air condi-
tioning systems only in well ventilated rooms! Es-
caping refrigerant vapours will mix with the ambient
air and displace the oxygen required for breathing
(danger of suffocating).
l
Smoking is prohibited when performing mainte-
nance and repair work on air conditioning systems!
Toxic breakdown products may be generated if re-
frigerant comes into contact with heat.
l
Refrigerant should always be extracted and re-
moved by flushing with nitrogen before starting
welding or soldering work near components of the
air conditioning system. The development of heat
may cause the refrigerant to develop toxic and high-
ly corrosive breakdown products.
l
Pungent smell! The toxic substances, which are re-
sponsible for the pungent smell, must not be in-
haled, since this may cause damage to the
respiratory system, the lung and other organs. Ex-
tract toxic breakdown products with a suitable ex-
traction system (workshop extraction system).
l
When blowing out components with compressed air
and when flushing with nitrogen the gas mixture es-
caping from the components must be extracted via
suitable extraction facilities (workshop extraction
systems).
Handling pressure vessels
l
Since the fluid container is pressurized, the manu-
facture and testing of these pressure vessels is gov-
erned by the pressure vessel directive. The
pressure vessels must be repetitively tested by an
expert as specified in TRB 532 Inspection by Ex-
perts, Repetitive Tests. In this case periodically re-
curring inspections consist of external
examinations, normally on containers in operation.
In combination with the inspection, the refrigerant
collector must be visually examined two times per
year. Special attention must thereby be paid to
signs of corrosion and mechanical damage. If the
container is in no good condition, it should be re-
placed for safety reasons, in order to protect the op-
erator or third parties against the dangers when
handling or operating pressure vessels.
l
Secure pressure vessels against tipping over or roll-
ing away.
l
Do not throw pressure vessels! Pressure vessels
may thereby be deformed to such an extent, that
they will crack. The sudden evaporation and escape
of refrigerant releases excessive forces. This ap-
plies also when snapping off valves on bottles. Bot-
tles must therefore only be transported with the
safety caps properly installed.
l
Refrigerant bottles must never be placed near heat-
ing radiators. Higher temperatures will cause higher
pressures, whereby the permissible pressure of the
vessel may be exceeded.
l
Do not heat up refrigerant bottles with an open
flame. Excessive temperatures can damage the
material and cause the decomposition of refriger-
ant.
l
Do not overfill refrigerant bottles, since any temper-
ature increase will cause enormous pressures.
Environment
It is strictly prohibited to release refrigerant into
the atmosphere during operation, maintenance