Komatsu PC18MR-3, Operation & Maintenance Manual

Page: 244 / 284

MAINTENANCE PROCEDURES
242
WEAM012101
7. Extend the boom, arm and bucket cylinders completely, as
shown in the figure, and remove the filler cap (F).
Put back the cap and pressurize the tank by lowering the
equipment to the ground.
NOTE
q
Make sure the hydraulic tank is pressurised. If it is not pressu-
rised, the pump will suck air, affecting tool operation.
8. Close the cab floor, see "3.2.9 TILTING THE CAB FLOOR".
4.9.7.b CHANGING THE OIL IN THE FINAL REDUCTION GEARS
WARNING
q
As soon as the machine has been stopped the oil is very hot and may cause burns; let the oil cool down
until reaching 40÷45°C before changing it.
q
Loosen the cap slowly to release any residual pressure.
q
Oils, filters, the coolant and the battery are considered special waste and must be collected and dis-
posed of according to the regulations in force.
This operation must be carried out on each reduction gear with the machine parked on level ground and at a tem-
perature of 40-45°C, so that the oil becomes fluid and can be drained easily, which facilitates the elimination of any
suspended solid particles.
1. Move the machine until the drain plug (P) is in low position
and perpendicular to the ground.
2. Remove the drain plug (P) and let the used oil flow out com-
pletely, gathering it into a container with suitable capacity.
While the oil flows out, remove the level plug (G).
3. Once the oil has been drained, put back the plug (2) and pour
oil of the prescribed type through the hole (G), until reaching
the lower edge of the hole itself.
4. Put back the plug (G).
Carry out some forward and backward movements, stop the ma-
chine and check the levels again. Always use oil of the prescribed
type (see "4.4 FUEL, COOLANT AND LUBRICANTS").
4.9.7.c CHECKING AND ADJUSTING THE ENGINE VALVE CLEARANCE
Since these checks and adjustments require the use of special tools, have them carried out by qualified personnel
supplied by your Komatsu Distributor.