Routine Maintenance
Engine
149 149
9811-3400-4
Changing the Coolant
1 Make the machine safe with the loader arms lowered.
Refer to Prepare the Machine for Maintenance.
2 Open the left side engine panel.
!MWARNING
The cooling system is pressurised when the coolant is
hot. When you remove the cap, hot coolant can spray
out and burn you. Make sure that the engine is cool
before you work on the cooling system.
9-3-3-1_2
3 Access to the filler cap is through a hole in the engine
cover above the filler cap. Slowly loosen cap. Let any
pressure escape. Remove the cap.
!MCAUTION
Keep your face away from the drain hole when
removing the drain plug.
2-3-3-4
4 Remove drain plug from the radiator drain extension
and drain the coolant.
5 Flush the system using clean water.
6 Refit drain plug.
7 Prepare a mixture of water and sodium carbonate.
Note: Use 0.5 kg (1.0 lb) of sodium carbonate for every 23
litre (5.0 UK Gal).
8 Fill the system slowly with the mixture to prevent air
locks. Wait 2 to 3 minutes to allow air to be vented and
top up the header tank to 1/3 full. Do not fit the filler
cap at this stage.
9 Run the engine for 5 minutes at the normal running
temperature. Stop the engine and allow to cool.
10 Drain the cooling system, checking that the coolant is
not dirty. If it is, repeat the flushing process (steps 7 to
10).
11 Fill the system as described at step 8 but using pre-
mixed water/antifreeze solution. Refer to Coolant
Mixtures.
12 Do not overfill. Fit the filler cap.
Note: A 50% antifreeze mixture must be used even if frost
protection is not needed. This gives protection against
corrosion and raises the coolant's boiling point.
13 Run the engine for a while to raise the coolant to
working temperature and pressure. Stop the engine
and check for leaks.
Note: Make sure the heater control is in the hot position
before running the engine. This will ensure that the coolant
mixture circulates through the entire cooling system.
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