Changing The Coolant - Komatsu WB93S-5 F50003 Operation & Maintenance Manual

MAINTENANCE PROCEDURES
4.8.12.b CHANGING THE COOLANT
Change the coolant every 2000 hours of operation or every
q
2 years, whichever occurs first.
Soon after the machine has been stopped the coolant is
q
very hot and under pressure and it may cause serious
burns; let the engine cool down until it reaches
approximately 40–45°C before changing the coolant.
Slowly loosen the radiator cap, in order to release any
q
residual pressure.
Oils, filters, the coolant and the battery are considered
q
special waste and must be collected and disposed of
according to the regulations in force.
IMPORTANTE
The change of the permanent coolant does not require any
q
washing cycle to descale the circuit.
1 - Open the engine hood (see "3.5.1 ENGINE HOOD").
2 - Loosen and remove the upper cap (1) of the radiator.
3 - Open the drain cock (2) of the radiator and let the fluid flow
out, gathering it into a container with suitable capacity. Drain
the expansion tank (3) while the fluid flows out.
4 - Close the drain cock (2) and fill the radiator with new fluid
(see "4.3 FUEL, COOLANT AND LUBRICANTS").
5 - Start the engine and let it run at accelerated idle speed for a
few minutes; check the level again and top up before putting
back the upper cap (1).
6 - Fill the expansion tank (3) until reaching the maximum level.
7 - Close the engine hood.
230
ATTENZIONE
AVVERTENZA
2
MAX.
MIN.
1
RKAB3860
2
RKAB5000
2
RKA15480
3
RKAB4120