Komatsu PC118MR-8 Operation And Maintenance Manual page 289

MAINTENANCE
Oils and greases
q Use clean oils and greases. Keep the oil and grease containers clean and prevent any foreign matter from
getting into them.
q Check and change the oil in a clean place and prevent any impurity from getting into the tank.
Do not mix oils of different brands.
Do not top up with oils different from those being used. If you cannot use the same oil, drain the tank and change
the oil completely.
Fuel
The type of fuel to use must be chosen based on the environmental temperature.
For details, see section "FUEL, COOLANT AND LUBRICANTS (4-12)".
Control of oils and worn filters
When changing oils or filters, check if metal particles are present. If there are large quantities of metal particles,
contact your Komatsu distributor.
Fuel filter
If the machine is provided with a fuel filter in the filler neck, do not remove it while refuelling.
Cleaning
q Keep the machine thoroughly clean; this facilitates troubleshooting. In particular, grease nozzles, breather
holes, and the areas where fluid levels are checked should be kept clean to prevent the infiltration of
impurities.
q When washing the machine, do not direct the high-pressure water jet onto the radiator.
q When washing the machine, protect the electric system connectors and avoid wetting the ignition switch.
q The fuel tank is made of plastic, therefore avoid using trichloroethylene to clean it. Trichloroethylene reduces
the resistance and duration of the tank.
Instructions for arc welding
q Before any welding operation on the machine, stop the engine, wait at least one minute, and afterwards turn
the battery main switch to OFF and extract the specific key.
q Disconnect the alternator and the KOMTRAX system control unit.
q Do not apply more than 200V continuously.
q Connect the earth cable within 1 m from the point where the welding operation must be carried out.
q Avoid placing gaskets and bearings between the welding area and the earth cable. If the earth cable is
connected near instruments, connectors, etc., these may not function correctly.
q Do not use the area around the work equipment pins or the hydraulic cylinders as earth.
Do not allow objects to fall inside the machine
q When opening the inspection covers or oil filler cap for inspection, be careful not to drop nuts, bolts, or tools
into the machine as this may cause damage and/or malfunction of the machine. If an object falls into the
machine, always remove it immediately.
q Avoid keeping loose objects or tools in your pockets.
When the work site is particularly dusty, proceed as
follows:
q Check the air filter for clogging and clean it more frequently than usual.
q Clean the radiator frequently in order to prevent the fins from clogging.
q Replace the fuel filter frequently.
q Clean the electrical components, especially the starter and the alternator, to avoid any accumulation of dust.
Locking the inspection covers
Securely fasten the inspection covers in place with the locking bar. If checks or maintenance are performed with
the inspection covers unblocked, they could be closed by the wind suddenly, causing injury to the operator.
WEAM014802
GUIDE TO MAINTENANCE
4-3