Guide To Maintenance - Komatsu WB93S-5 F50003 Operation & Maintenance Manual

GUIDE TO MAINTENANCE

4.1 GUIDE TO MAINTENANCE
Oils, filters, coolant, gaskets, electric wires and batteries are considered special waste and must be
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collected and disposed of according to the regulations in force.
The combustible material of some components may become extremely dangerous if it burns. For this
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reason, avoid any contact of burnt material with your skin or eyes and do not inhale the fumes (see "2.8
PRECAUTIONS TO BE TAKEN DURING MAINTENANCE").
Before opening the engine hood, engage the safety locks of both the front loader and the backhoe.
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If it is necessary to check the hydraulic oil level in the tank, set the machine in transport position (see "3.1
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SAFETY LOCKS").
Carry out any maintenance operation on firm and level ground, after applying the parking brake.
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Use Komatsu genuine oils and greases; choose oils suitable for the ambient temperature.
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Use clean oils and greases. Keep the oil and grease containers clean and prevent any foreign matter from
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getting into them.
Always keep the machine clean: this makes it easier to locate any failed part.
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In particular, clean the grease nipples, the breathers and the areas near the openings for the level checks, to
prevent any impurities from getting into/on them.
Draining hot oil or coolant immediately after stopping the engine is hazardous. Wait for the engine to cool down
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until reaching a temperature of at least 40–50° C.
When changing the oil or the filters, check for metal particles. If you find large quantities of metal particles,
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contact your Komatsu Dealer.
Check and change the oil in a clean place and prevent any impurities from getting into the tank.
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Before carrying out any maintenance operation, hang warning plates on the ignition switch, the control levers
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and the cab doors, to prevent anyone from starting the engine.
When performing maintenance operations, always take the precautions indicated on the safety plates applied to
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the machine.
Instructions for arc welding:
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1 - Turn the ignition key to position « ».
2 - Disconnect the battery (first the negative pole and then the positive pole).
3 - Disconnect the alternator.
4 - Do not apply more than 200V continuously.
5 - Connect the earth cable within 1 m from the point where the welding operation must be carried out.
6 - Avoid placing gaskets and bearings between the welding area and the earth cable.
Do not use flammable fluids to clean any parts of the machine. Keep naked flames away from these fluids and
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avoid smoking.
When O rings and gaskets are removed, clean the sealing surfaces thoroughly and replace the O rings and
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gaskets with new ones. Fit the O rings and gaskets correctly when reassembling.
Avoid keeping loose objects or tools in your pockets: they may fall out and drop into the machine, especially
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when you open covers and work on the machine while bending over it.
When washing the machine, do not direct the high-pressure water jet onto the radiator and the heat exchanger.
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When washing the machine, protect the electric system connectors and avoid wetting the ignition switch.
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Before starting work in mud, under the rain, on seashores or river banks, provide for lubrication where required.
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Wash the machine immediately after work to protect the components from rust. Lubricate the equipment joints
more frequently than usual.
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AVVERTENZA