Volvo Penta TAD1630G Workshop Manual page 9

Group 20
The working methods described in the Workshop manual
apply to work carried out in a workshop. The engine has
been removed and is installed in an engine fixture. Unless
otherwise stated reconditioning work which can be carried
out with the engine in place follows the same working
method.
Warning symbols used in this Workshop manual (for full
explanation of the symbols refer to the section "Safety Pre-
cautions")
WARNING!
IMPORTANT!
Note:
are not in any way comprehensive since it is impossible to
predict every circumstance under which service work or re-
pairs may be carried out. AB Volvo Penta can only indicate
the risks considered likely to occur as a result of incorrect
working methods in a well equipped workshop using working
methods and tools tested by AB Volvo Penta.
All operations described in the Workshop manual for
which there are Volvo Penta Special Tools available as-
sume that these tools are used when carrying out the re-
pair. Volvo Penta Special Tools have been specifically de-
veloped to ensure as safe and rational working methods
as possible. It is therefore the responsibility of anyone us-
ing other tools or other working methods than we recom-
mend to determine that there is no risk of personal injury
or mechanical damage or malfunction as a result.
In some cases special safety precautions and user instruc-
tions may be required in order to use the tools and chemicals
mentioned in the Workshop manual. Always follow these
precautions. There are no specific instructions given in the
Workshop manual.
By following these basic recommendations and using com-
mon sense it is possible to avoid most of the risks involved
in the work. A clean work place and a clean engine will elimi-
nate many risks of personal injury and engine malfunction.
Especially when working on the fuel system, engine lubrica-
tion system, air intake system, turbocharger unit, bearing
seals and seals, it is extremely important to avoid dirt or for-
eign objects entering the parts or systems, since this can re-
sult in reduced service life or malfunctions.
Repair instructions
Our common responsibility
Every engine consists of many systems and components
that work together. If one component deviates from the tech-
nical specifications this can have dramatic consequences on
the environmental impact of the engine even if it is otherwise
in good running order. It is therefore critical that the stated
wear tolerances are observed, that systems which can be
adjusted are correctly set up and that only Volvo Penta Orig-
inal Parts are used on the engine. The stated service inter-
vals in the Maintenance Schedule must be followed.
Some systems, such as the components in the fuel system,
require special expertise and special testing equipment for
service and maintenance. Some components are factory
sealed for environmental and product specific reasons. Un-
der no circumstances attempt to service or repair a sealed
component unless the service technician carrying out the
work is authorized to do so.
Bear in mind that most chemical products, incorrectly used,
are hazardous to the environment. Volvo Penta recommends
the use of bio-degradable degreasing agents for all cleaning
of engine components unless otherwise stated in the
Workshop manual. Pay special attention to make sure that
oils and washing residue etc are handled correctly for de-
struction, and do not unintentionally end up in nature.
Torque
Correct torque for critical joints which must be tightened us-
ing a torque wrench are listed under "Technical Data -
torque" and stated in the method descriptions in the Work-
shop manual. All torque data apply to cleaned threads,
bolt heads and mating surfaces. Torque data stated apply
to lightly oiled or dry threads. Where grease, locking or
sealing agents are required for screwed joints this is stat-
ed in both the operation description and in "torque".
Where no torque is stated for a joint use the general
torque shown in the table below. The torques stated are a
guide and the joint does not have to be tightened using a
torque wrench.
Dimension
M5 ......................................... 6
M6 ....................................... 10
M8 ....................................... 25
M10 ..................................... 50
M12 ..................................... 80
M14 ................................... 140
Service procedures
Torque
Nm
7