MAINTENANCE 4.2 PRECAUTIONS FOR MAINTENANCE 4.2 PRECAUTIONS FOR MAINTENANCE G Before starting any lubrication or maintenance work read the Fundamental Safety Instructions on page 16. G Park the Excavator at a safe place on level ground. Proceed according to the instructions on page 239 ”Parking the Excavator”. Lower the attachment flat onto the ground. Move all control levers to neutral position. G Stop the engine and move all control levers through their shift positions to relieve the pressure in the hydraulic system. Refer to page 240 ”Stopping the Engine” for detailed descrip- tion of the stopping procedure.
G A warning plate ”CAUTION MACHINE MAINTENANCE” must be fixed in the Operator’s cab before any lubrication or maintenance work is started. NOTICE Some checks and adjustments can only be done with the engine running. For such jobs two men are necessary. Thereby, the controls must not be left unattended, while the other man carries out checks and adjustments. The man in the operator’s seat must keep constant visual contact with the other one and they must agree on suitable communication signals before they start their work. G Block the machine to prevent machine movement G Always use safety devices to block hydraulic cylinders.
Never rely on the machine hydraulic system to hold when working on the loader attachment. A hydraulic line or cylinder could fail or someone could accidently strike the control levers causing the loader to fall. G Relieve all pressure in the hydraulic system before servicing the hydraulic system. G Oily cloth and inflammable material must be removed from the machine. Clean the excavator before starting mainte- nance work. G Switch-off battery main switch and remove key, before work- ing on the electrical system. G Wear safety clothing, goggles, respirator and other safety devices, whenever working conditions make this necessary. Observe the local safety rules.
G Never allow unauthorized persons access to the machine during lubrication and maintenance work. G After servicing, remove oily cloth, inflammable material and all tools from the machine. G Clean the Excavator with a steam jet, especially after servic- ing fuel system, engine and hydraulic system. 283