262 Equipment operation Useful information Equipment operation These Operating Instructions describe all the models and standard and optional equipment of your vehicle that were available at the time of going to print. Country-specific differences are possible. Bear in mind that your vehicle may not be equipped with all the functions described. This also applies to safety-relevant systems and functions. Read the information on qualified specialist workshops ( Y page 30). General notes Engine speed mode If engine speed mode is activated, it is possi- ble to drive at a constant engine speed above the idling speed in equipment operation.
Driving characteristics in engine speed mode differ considerably from driving in normal mode. The accelerator no longer controls the drive torque, but the engine speed. Engine speed mode should be disengaged for pulling away on uphill slopes in traffic. The engine brake is unavailable in engine speed mode. Engine speed mode is automat- ically deactivated if you drive faster than approximately 25 km/h. The F indicator lamp in the status area of the on-board com- puter goes out. Ballast/weights Working mode ! Observe the permissible axle and wheel loads. Do not exceed the maximum gross vehicle weight.
During transportation, the difference between the left and right wheel loads should not exceed 10%. The following parts of the vehicle may oth- erwise be damaged: Automatically activating engine speed mode R tyres R chassis If you activate one of the following systems, engine speed mode is automatically activa- ted: R axles The driving, braking and steering character- istics of the vehicle change when equipment is coupled or attached as a result of the addi- tional overhang and momentum of the equip- ment. Drive with even greater care. The Unimog has a lightweight construction to enable it to carry the maximum possible equipment weights and payloads.
Therefore, it is necessary to load it with ballast weights. The weight of the Unimog must be adapted to suit the work to be performed. R hydrostatic drive system ( Y page 198) R transmission-driven power take-off ( Y page 264) R engine-driven power take-off ( Y page 264) R Front PTO shaft ( Y page 267) Working speed X Activate constant working speed mode in the on-board computer ( Y page 263). or X Set the working engine speed using the accelerator. Manually activates/deactivates engine speed mode Only activate engine speed mode when you are operating equipment that requires this mode to be activated. This can be the case