Maintenance0011−1/A1
Winterthur Gas & Diesel Ltd.
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3. Precautionary measures before beginning of
maintenance work
Before starting any maintenance work on the engine (particularly on the running
gear), take the following precautionary measures:
1) Close the shut-off valves on the starting air bottles.
2) Close all the shut-off valves in the control air supply unit, and open the drains on
both air bottles until it is depressurized.
3) Close by hand the (automatic) shut-off valve for starting air and open the vent
and drain valve to the main starting air piping on the engine as well as the vent
valves on the shut-off valve for starting air, and leave them in this position until
maintenance work is completed.
4) Open all indicator cocks on the cylinder covers and leave them in this position
until maintenance work is completed.
5) Engage turning gear (gear pinion must be in engaged position) and lock the lever
(see also 3206−1 and 0750−1 in the Operating Manual).
D Where the engine has been stopped due to overheated running gear or
bearings, wait at least 20 minutes before opening the crankcase doors.
D The crankcase doors must always be locked with all the clamps whenever
the engine is running, even if this is only for a short time in order to make
temperature checks (e.g. after changing bearings during an overhaul, etc.).
D In the case of a fire in the engine having been extinguished by means of CO
2
, the
spaces affected must be well ventilated before work can be carried out within
them.
CAUTION
Damage Hazard: When you do electric welding near or on the
engine, electromagnetic fields or peak voltage can occur. This
can damage the electronic components of the Engine Control
System UNIC.
Therefore, prior to performing electric welding in the vicinity of the mentioned
components, the following precautions must be taken:
D Stop the engine if it is in operation.
D Power off the electronic system and wait one minute.
D If the welding point is within a radius of two metres from an electronic module
and/or a sensor, disconnect the modules and/or sensors.
D Close the covers of all electric boxes and protect cables, sensors, etc. against
sparking and heat.
D Shield the check and control units with a conductive material and connect them
to earth.
D Run the welding cable from the welding apparatus directly to the welding point
without any unnecessary loops; also, avoid leading the welding cable parallel to
cables of the electronic control unit.
2015
Safety Measures and Warnings
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