DAF LF45 Maintenance Manual page 105

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES
ΛΦ45/55 series
5.3 DRAINING, FILLING AND BLEEDING THE COOLING SYSTEM
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In order to avoid damaging the
cylinder block, do not top up a warm
engine with cold coolant. Coolant is
a toxic fluid and must be handled
with care. Protect skin and eyes.
Coolant is harmful to the
environment; after use, it should be
processed as industrial chemical
waste. When the coolant is hot, there
is overpressure in the cooling
system. When removing the filler
cap, allow the overpressure to
escape by first loosening the filler
cap one turn.
Draining the cooling system
1. Turn the heater temperature control knob in
the cab to the "warmest" setting.
2. Remove the cooling system filler cap.
3. Collect the coolant. Position suitable
containers under the drain points.
4. Drain the cooling system at the radiator via
the drain plug.
5. Flush the cooling system.
6. Close the drain plug.
Filling and bleeding cooling system
1. Turn the heater temperature control knob in
the cab to the "warmest" setting.
2. Fill the cooling system with the specified
coolant.
3. Run the engine for several minutes.
4. The cooling system is auto-bleeding.
Ensure that the air bleed pipe from the
thermostat housing to the header tank is not
twisted or pinched.
Note:
Make sure that air can escape when the
cooling system is filled.
5. Check the coolant level, and top up with
coolant if necessary.
©
200515
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Draining and filling
M201084
5-3
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