MTU 20 V 4000 C22 Operations Instructions download pdf (Page 14)

1.7 Safety precautions when working on the engine

Safety requirements for maintenance and repair work

• Maintenance and repair work may only be carried out by authorized, qualified personnel.

• Allow the engine to cool down before commencing maintenance work (oil vapors present a risk of ex‐

plosion).

• Before starting work, relieve pressure in systems and compressed-air lines which are to be opened.

• Take special care when removing ventilation or plug screws from engine. Cover the screw or plug with

a rag to prevent fluids escaping under pressure.

• Take special care when draining hot fluids ⇒ risk of burning.

• When changing the engine oil or working on the fuel system, ensure that the engine room is ade‐

quately ventilated.

• Prior to all work, allow the engine / genset to cool down.

• Observe maintenance and repair instructions.

• Never perform care or maintenance work with the engine running unless expressly instructed to do so.

• Lock-out/tag-out the engine to preclude undesired starting.

• With electric starter, disconnect the battery.

• Close the main valve on the compressed-air system and vent the compressed-air line when air start‐

ers are fitted.

• Disconnect the control device from the assembly or plant.

• Only use adequate, calibrated tools.During assembly and disassembly, observe the specified tighten‐

ing torques.

• Carry out work only on assemblies or plants that are secured as specified.

• Do not use lines as climbing aids.

• Keep fuel injection lines and connections clean.

• Always fit caps/covers to close off any openings exposed by removing or opening lines.

• Take care to avoid damaging fuel lines in the course of care and maintenance work.

• Ensure that all mounts and dampers are correctly installed.

• Ensure that all fuel injection and pressurized oil lines are installed with enough space to prevent con‐

tact with other components. Do not place fuel or oil lines near hot components.

• Do not touch elastomeric seals (e.g. Viton sealing rings) if they have carbonized or resinous appear‐

ance.

• Note cooling period for components which are heated for installation or removal ⇒ Risk of burning!

• When working high on the engine, always use suitable ladders and work platforms. Make sure compo‐

nents are placed on stable surfaces.

• Observe special cleanness during maintenance and repair work on the assembly or plant. After com‐

pletion of maintenance and repair work, make sure that no loose objects are in/on the assembly or

plant.

• Ensure that all personnel is clear of danger zones before turning the engine. Check that all guards

have been reinstalled and that all tools and loose parts have been removed after working on the en‐

gine.

• If starters with beryllium copper pinions are installed, the following also applies:

To avoid health risks with the pinion containing beryllium, breathing protection of filter class P2 must

be worn during maintenance work. Do not blow out the interior of the flywheel housing and the starter

with compressed air. The interior of the flywheel housing must be additionally cleaned with a dust-

removal machine of class H.

Welding work

Never carry out welding work on the assembly or engine plant or mounted units. Cover the engine when

welding in its vicinity.

Do not use the assembly or plant as a ground terminal.

Never place the welding cable across or near wiring harnesses of MTU plants. The welding current may

otherwise induce an interference voltage in the wiring harnesses which could damage the electrical sys‐

tem.

14 | Safety | M015675/05E 2011-10

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MTU 20 V 4000 C22 Operations Instructions Page 14

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