Man D2862 LE221 Repair Manual page 12

INTRODUCTION
Attachments and special bodies
– Comply with the safety instructions and regulations issued by the body manufacturer in question if
attachments or special bodies are tted.
Working on high-pressure lines
– Do not attempt to tighten or loosen pipe lines and hoses when they are under pressure (e.g. lubrication
circuit, coolant circuit and hydraulic oil circuit).
Fluid spraying out represents an injury hazard!
Testing injector nozzles
– Wear appropriate protective equipment.
– Do not hold any parts of your body under the jet of fuel when checking the injector nozzles.
– Do not inhale fuel vapours, ensure adequate ventilation.
Work on the electrical system
– Make sure the batteries are rmly connected before starting the engine.
– Do no disconnect the batteries whilst the engine is running.
– Do not start the engine unless all the connections to the electronic control unit are in
place.
– Do not use a boost-charger to start the engine. Only render starting assistance with
separate batteries.
– The battery terminals must be disconnected for boost-charging the batteries. Comply
with the operating instructions for the boost-charger.
– Disconnect the batteries before starting electric welding work, and connect both
cables (+ and -) rmly together.
– Do not disconnect or connect the connections of the control unit unless the electrical
system is switched off.
– Take care when connecting the control unit to its electrical power supply.
Cross-polarity, e.g. caused by incorrect connection to the batteries, can lead to
irreparable damage to the control unit.
– Tighten connections on the injection system to the prescribed tightening torques.
– Remove the control units if you are expecting them to be exposed to temperatures
in excess of 80 °C (e.g. drying oven).
– Only use suitable test cables for taking measurements on plug connections.
– Telephones and radios not connected to an external aerial can lead to malfunctions
in the electronics and thereby impair the operational safety of the engine.
Important! Battery gases are explosive!
– Oxyhydrogen gas may form in enclosed battery boxes. Take particular care after the engine has been
running for a long time or after charging the batteries with a battery charger.
– Avoid short circuits caused by polarity reversal or by placing metal objects (spanners, mole grips, etc.) on
the battery terminals.
– Disconnect the batteries or recharge them every 4 weeks if the engine is not in use.
– When the batteries are disconnected this gas may be ignited by sparks produced by other continuously
operating consumers that have not been shut down.
disconnecting the batteries!
Caution! Battery acid is poisonous and corrosive!
– Comply with the manufacturer's regulations.
– Wear appropriate protective clothing (gloves) when handling batteries.
Do not tilt batteries, acid may leak out.
– Measure voltage only using a suitable measurement device! The input resistance of the measurement
device must be at least 10 MΩ.
– The ignition must be switched off before the wiring harness plugs of the electronic control units are
disconnected or connected up!
10
Ventilate the battery box adequately before
AE6 3st edition