4.1 Guides to maintenance Maintenance Do not drop things inside machine: z When opening inspection windows or the oil filler port of the tank to carry out inspection, be careful not to drop nuts, bolts, or tools inside the machine. If such things are dropped inside the machine, it will cause damage and malfunction of the machine, and will lead to fail- ure. If you drop anything inside the machine, always remove it immediately. z Do not put unnecessary things in your pockets. Carry only things which are necessary for inspection. Dusty worksites: When working at dusty worksites, do as follows: z Inspect the dust indicator frequently to see if the air cleaner is dirty or clogged.
z Clean the radiator core frequently to avoid clogging. z Clean and replace the fuel filter frequently. z Clean electrical components, especially the starting motor and alternator, to avoid accumulation of dust. z When inspecting or changing the oil, move the machine to a place that is free of dust to prevent dirt from getting into the oil. Avoid mixing oil: If a different brand or grade of oil has to be added, drain the old oil and replace all the oil with the new brand or grade of oil. Never mix different brands or grades of oil. Locking inspection covers: Lock inspection cover in position securely with the lock bar.
If inspection or maintenance is carried out with the inspection cover not locked in position, there is a hazard that it may be sud- denly blown shut by the wind and cause injury to the worker. Bleeding air from hydraulic circuit: If the hydraulic oil equipments have been repaired or replaced and if the hydraulic hoses, pipes, etc. have been disconnected, it is necessary to bleed air in the circuit. See "Change oil in hydraulic tank, replace hydraulic filter element (4-60)". WA150-5H – VEAM934100 4-3