Volvo TAD650VE, Руководство по ремонту

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Repair instructions Group 30: Electrical system
6
Our common responsibility
Each engine consists of a large number of collaborat-
ing systems and components. Any deviation of a com-
ponent from its technical specification can dramatical-
ly increase the environmental impact of an otherwise
good engine. For this reason, it is important that the
specified wear tolerances are observed, that systems
which are adjustable are correctly adjusted and that
Volvo Penta Original Spares are used for the engine.
The stated service intervals in the Maintenance
Schedule (see the Owner’s Manual) must be ob-
served.
Some systems, such as the components in the fuel
system, require special expertise and special testing
equipment for service and maintenance. For environ-
mental reasons etc., some components are sealed at
the factory. It is only permissible to work on sealed
components if you are authorized to do such work.
Remember that most chemical products, incorrectly
used, damage the environment. Volvo Penta recom-
mends the use of biodegradable degreasers whenever
engine components are de-greased, unless otherwise
specified in the workshop manual. When working
aboard a boat, be careful to ensure that oils, wash
residue etc. are processed for destruction, and are not
inadvertently discharged with bilge water into the envi-
ronment.
Tightening torques
The tightening torque for vital fasteners, which should
be tightened with a torque wrench, are listed in “Tech-
nical Data: Special tightening torques” and noted in the
job descriptions in the book. All torque specifications
apply to clean screws, screw heads and mating faces.
Torque data stated apply to lightly oiled or dry threads.
If lubricants, locking fluids or sealants are needed on a
fastener, the type of preparation to be used will be not-
ed in the job description and in “Tightening Torques”.
For fasteners where specific torque values are not giv-
en, please refer to “Technical data: General tightening
torques”. General torque specifications are target val-
ues and the fastener does not need to be tightened with
a torque wrench.
Dimension Torque
Nm
M5 ................................................. 6
M6 ................................................. 10
M8 ................................................. 25
M10 ............................................... 50
M12 ............................................... 80
M14 ............................................... 140
M16 ............................................... 220