MAINTENANCE 4.8 EVERY 10 OPERATING HOURS OR DAILY 4.8.3 RADIATORS - CHECK COOLANT LEVEL Legend for illustration Z 21770 (6) Coolant expansion tank of front and rear engine radi- ators (7) Coolant level sight gauge on front and rear coolant expansion tanks (8) Cover plates on power house roof above front and rear radiator pressure caps (9) Radiator pressure caps DO NOT remove the radiator pressure cap (9), illust. Z21770 from a hot engine. Wait until the temperature is below 50°C before removing the pressure cap (9). Failure to do so can result in personal injury from heated coolant spray or steam.
Turn the radiator cap (9) slowly counterclockwise to the safety stop to allow the pressure to escape, then continue to turn until cap is free to be removed. The coolant level should be in the upper field of the sight gauges (7). If necessary add coolant. REMARK Refer to the Engine Operation and Maintenance Manual for the correct coolant composition. 4.8.4 TRACK GROUPS - CLEAN See (10), illustration Z 21770. Clean track groups especially during the cold season. 329 WARNING