MAINTENANCE EVERY 1000 OPERATING HOURS
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DRAINING OFF THE COOLANT
1. Switch off the engine and let it cool down.
2. Turn 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.
3. Stretch a tube onto the drain opening (1) of the discharge
cock and insert the other tube end into the collecting con-
tainer.
4. Open the discharge cock and let the coolant run off.
5. Close the discharge cock.
CLEANING THE COOLING SYSTEM
☞
• The cooling system may only be filled slowly since other-
wise the included air cannot escape completely. After fill-
ing up, wait approx. 3 minutes and refill liquid, if required.
6. Fill up the cooling system slowly with cleaning fluid
(Adhere to the specifications of the cleaning agent manufac-
turer).
7. With the radiator cap opened, let the engine run for 5 min-
utes with a coolant temperature of approx. 176°F(80°C).
8. After the cleaning, switch off the engine and open the drain
valvetolettheentirecoolingsystemrunempty.Re-lockthe
drain valve and slowly fill the cooling system with clean wa-
ter.
9. Let the engine run for five minutes with a coolant tempera-
ture of approx. 176°F(80° C).
10. Then, let the cooling system run empty again. If the extrud-
ing water is not clean, the cooling system must be re-flushed
until the extruding water is clean.
11. Close the drain valve.
FILLING OFF COOLANT
12. Empty and clean the expansion tank.
13. Prepare the coolant as prescribed.
14. Fill off the coolant slowly into the cooling system up to the
overflow shoot of the radiator.
15. To bleed the cooling system while the radiator cap is re-
moved, let the engine run idle for five minutes with its lower
speed (rpm) and then for another five minutes with its top
speed. Fill off with coolant if the coolant level in the radiator
is dropping.
16. Switch off the engine, wait approx. three minutes and then
refill coolant up to overflow shoot of the radiator. Re-lock the
radiator.
17. Fill off coolant into the expansion tank, until the coolant level
is between the FULL and LOW markings.
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