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Draining off the coolant
1. Switch off the engine and let it cool down.
2. Use a suitable aid (e.g. ladder) to climb up the back of the machine
and undo the cover screws on the engine hood.
3. Swivel the radiator cap (arrow) slowly to the side, up to the first fixed
stop, and let the pressure escape. Then press down the cover, while
proceeding with swivelling. Then, remove the cover.
4. Stretch a tube onto the drain opening (1) of the discharge cock and
insert the other tube end into the collecting container.
5. Open the discharge cock and let the coolant run off.
6. Close the discharge cock.
Cleaning the Cooling System
NOTE
The cooling system may only be filled slowly since otherwise the
included air cannot escape completely. After filling up, wait approx.
3 minutes and refill liquid, if required.
7. Fill up the cooling system slowly with cleaning fluid
(Adhere to the specifications of the cleaning agent manufacturer).
8. With the radiator cap opened, let the engine run for 5 minutes with a
coolant temperature of approx. 80°C.
9. After the cleaning, switch off the engine and open the drain valve to
let the entire cooling system run empty. Re-lock the drain valve and
slowly fill the cooling system with clean water.
10.Let the engine run for five minutes with a coolant temperature of
approx. 80° C.
11.Then, let the cooling system run empty again. If the extruding water is
not clean, the cooling system must be re-flushed until the extruding
water is clean.
12.Close the drain valve.
Filling Up Coolant
13.Empty and clean the expansion tank.
14.Prepare the coolant as prescribed.
15.Fill up the coolant slowly into the cooling system up to the overflow
shoot of the radiator.
16.To purge the cooling system while the radiator cap is removed, let the
engine run idle for five minutes with its lower speed (rpm) and then
for another five minutes with its top speed. Fill up with coolant if the
coolant level in the radiator is dropping.
17.Switch off the engine, wait approx. three minutes and then refill coolant
up to overflow shoot of the radiator. Re-lock the radiator.
18.Fill up coolant into the expansion tank, until the coolant level is between
the FULL and LOW markings.
MAINTENANCE EVERY 1000 OPERATING HOURS
3-45
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