Changing The Coolant - Komatsu Utility Avance WB91R-2 Operation & Maintenance Manual

MAINTENANCE PLAN
4.7.12.b CHANGING THE COOLANT
DANGER
• Soon after the machine has been stopped the coolant is
very hot and under pressure and it may cause serious
burns; let the engine cool down until it reaches approxi-
mately 40÷45°C before changing the coolant.
• Slowly loosen the radiator cap, in order to release the re-
sidual pressure.
• Oils, filters, the coolant and the battery are considered
special waste and must be collected and disposed of ac-
cording to the anti-pollution regulations in force.
IMPORTANT
• The change of the permanent coolant does not require
any washing cycle for the descaling of the circuit.
1 - Remove the front guard (1) after removing the relevant fas-
tening screws (2).
Use a 17 mm hexagon spanner.
2 - Open the engine hood (See "14.1 ENGINE HOOD").
3 - Loosen and remove the upper cap (3) of the radiator.
4 - Open the radiator drain cock (4) (see Fig. A), loosen the drain
valve (5) positioned on the filter carrier head and let the fluid
flow out, collecting it in a container with suitable capacity (re-
member that the capacity of the cooling system is approxi-
mately 14 liters).
Use 12 mm spanners.
5 - Close the radiator drain cock (4) (see Fig. B), tighten the
valve (5) on the filter carrier head and fill the radiator with
new fluid.
(See "4.3 FUEL, COOLANT AND LUBRICANTS").
6 - Start the engine and let it idle for a few minutes; check the
level again and top up before putting back the upper cap (2).
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1
2
3
4
A
90˚
2
RWAB0350
RWAB0380
RWAB0410
4
RWA38090