Komatsu PC18MR-3, Руководство по эксплуатации и техническому обслуживанию

Страница: 197 / 284

MAINTENANCE NOTES
WEAM012101
195
4.2.1.2 FUEL
q
Always use fuel suitable for the engine. Other fuels with different specifications may damage the engine or re-
duce its power.
q
Always refuel at the end of the workday.
q
When refuelling, make sure that there is no water on the fuel drum cover and take care not to draw condensate
from the drum bottom.
q
If fuel runs out, or if the fuel filter has been replaced, it is necessary to bleed the circuit.
q
If there are foreign bodies in the fuel tank, wash the tank and the fuel circuit.
q
Use only low- or ultra low-sulphur content fuel.
IMPORTANT
q
Always use diesel oil as fuel.
To ensure good characteristics of fuel consumption and exhaust gases, the engine fitted to this machine
uses an injection device at high pressure.
This device needs that components and lubrication have high precision characteristics, therefore, its
working life may be considerably reduced if you use low viscosity fuel with poor lubricating capacity.
4.2.1.3 COOLANT
q
The coolant is used to keep the engine at the right temperature and in ideal working conditions; check the level
in the expansion tank daily and, if required, refill with coolant to the correct concentration according to the mini-
mum atmospheric temperature. For concentration, see "4.4.1 COOLANT".
q
The coolant containing antifreeze is flammable; do not use naked flames near the coolant and do not smoke
while topping up.
q
Use only Komatsu original permanent antifreeze coolant (AF-NAC), an ethylene glycol-based solution with anti-
corrosive and antifoam products compatible with aluminium radiators.
q
The use of permanent antifreeze requires only the check of the level and the periodical change of the fluid. It is
not necessary to wash the cooling circuit.
q
Use drinkable water and in any case soft water.
q
Do not use corrosion inhibitors containing soluble oil, since they damage the rubber couplings.
q
In case of doubt regarding the applicable standards for the use of coolant, contact your Komatsu Distributor, who
will supply you with exhaustive and precise information.
4.2.1.4 GREASE
q
Use grease to prevent seizing and noise related to the joints.
q
These construction equipment are used in heavy working conditions. Always use recommended grease and re-
spect replacement intervals as well as room temperatures recommended in this user and maintenance manual.
q
The greased parts not included in the maintenance section relate to overhaul, therefore, they do not require
grease application.
If any component turns rigid after it has been used for a long time, add grease.
q
When cleaning the involved area, always wipe out any old grease that flows out when applying grease.
Pay particular attention to eliminate the old grease in the areas where deposited sand or retained impurities may
cause wear and tear of rotary components.