Volvo Penta AQ125A, Руководство по ремонту

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6
Repair instructions
The working methods described in the Service Man-
ual apply to work carried out in a workshop. The en-
gine has been removed from the boat and is in-
stalled 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 occurring in the Workshop Man-
ual (for their meaning see
Safety information)
WARNING!
IMPORTANT!
NOTE!
are not in any way comprehensive since it is
impossible to predict every circumstance under
which service work or repairs may be carried out.
For this reason we can only highlight the risks that
can arise when work is carried out incorrectly in a
well-equipped workshop using working methods and
tools developed by us.
All procedures for which there are Volvo Penta spe-
cial tools in this Workshop Manual are carried out
using these. Special tools are developed to rational-
ize working methods and make procedures as safe
as possible. It is therefore the responsibility of any
person using tools or working methods other than
the ones recommended by us to ensure that there is
no danger of injury, damage or malfunction resulting
from these.
In some cases there may be special safety precau-
tions and instructions for the use of tools and chem-
icals contained in this Workshop Manual. These
special instructions should always be followed if
there are no separate instructions in the Workshop
Manual.
Certain elementary precautions and common sense
can prevent most risks arising. A clean workplace
and engine eliminates much of the danger of injury
and malfunction.
It is of the greatest importance that no dirt or for-
eign particles get into the fuel system, lubrication
system, intake system, turbocharger, bearings and
seals when they are being worked on. The result
can be malfunction or a shorter operational life.
Our joint responsibility
Each engine consists of many connected systems
and components. If a component deviates from its
technical specification the environmental impact of
an otherwise good engine may be increased signi-
ficantly. It is therefore vital that wear tolerances are
maintained, that systems that can be adjusted are
adjusted properly and that Volvo Penta Genuine
Parts as used. The engine Maintenance Schedule
must be followed.
Some systems, such as the components in the fuel
system, require special expertise and special test-
ing equipment for service and maintenance. Some
components are sealed at the factory for environ-
mental reasons. No work should be carried out on
sealed components except by authorized personnel.
Bear in mind that most chemicals used on boats are
harmful to the environment if used incorrectly. Vol-
vo Penta recommends the use of biodegradable de-
greasing agents for cleaning engine components,
unless otherwise stated in a workshop manual.
Take special care when working on-board, that oil
and waste is taken for destruction and is not acci-
dentally pumped into the environment with bilge wa-
ter.
Tightening torques
Tightening torques for vital joints that must be
tightened with a torque wrench are listed in work-
shop manual “Technical Data”: “Tightening Torques”
and are contained in work descriptions in this Man-
ual. All torques apply for cleaned threads, screw
heads and mating surfaces. Torques apply for light-
ly oiled or dry threads. If lubricants, locking fluid or
sealing compound are required for a screwed joint
this information will be contained in the work de-
scription and in “Tightening Torques” Where no
tightening torque is stated for a joint use the general
tightening torques according to the tables below.
The tightening torques stated are a guide and the
joint does not have to be tightened using a torque
wrench.
Dimension Tightening Torques
Nm lbt.ft
M5 6 4.4
M6 10 7.4
M8 25 18.4
M10 50 36.9
M12 80 59.0
M14 140 103.3