BI619954
Edition 03.2009
Maintenance
Caution Always fill the cooling system using an Antifrogen N/water mixture in the ratio of 44% to 56% Never add any other coolant! Always ensure that the coolant is clean! Suitably filter the coolant before filling the cooling system! Take into consideration the general safety information and instructions when handling Antifrogen N (refer to Chapter 6.7)! If the filling level specified is exceeded then it is possible that the equalization reservoir will overflow!
6.5
Cooling system: Coolant specimen, analysis
The cooling medium should be analyzed at regular intervals. In doing so, the specified antifreeze protection should be guaranteed and it should also be checked that the specified quantity of inhibitors are present. Inhibitors are chemical agents in the cooling medium that act to prevent corrosion. The cooling medium specimen should be taken from the equalization reservoir. The following steps must be carried-out: •
Remove the overflow hose at the cover of the equalization reservoir
•
Open the equalization reservoir cover
Warning The cooling system may be under pressure! The cooling medium can reach temperatures of up to 60°C. Danger of burning! Always carefully and slowly open the cover of the equalization reservoir to ensure slow pressure equalization!
•
Withdraw the required quantity of cooling medium (250 ml) using a suitable instrument
•
Replace the amount of cooling medium withdrawn so that the liquid level remains at the correct level (also refer to Chapter 6.4)
•
Re-close the equalization reservoir cover
•
Re-attach the overflow pipe and correctly tighten the pipe clamp (3 Nm tightening torque)
Siemens Ltd. A5E01511750J/ 4M-2601-1645240 AC
Shovel 295HD/ HR DCC Operation & Maintenance Manual
79
