Operating techniques
Operating on inclines 87
Overspeed protection
Function description
Q If there is a risk of the engine overspeeding, an upshift is made
to the next higher gear, regardless of the position of the gear
selector and the gearshift inhibitor.
Q From 1st to 6th gear, shifting takes place at 2300 rpm (38 r/s).
Q When 6th gear forward, or 2nd gear reverse, has been reached
and the engine speed exceeds 2300 rpm (38 r/s), lock-up is
disengaged and the retarder is activated after two seconds. At
2350 rpm (39 r/s), the retarder is activated immediately.
Q In all other gears, lock-up is disengaged and retarder is
activated immediately if the engine speed exceeds 2400 rpm
(40 r/s).
WARNING!
When operating down a steep grade with a full load, it may
be that the exhaust brake and the engine brake function do
not provide sufficient retardation, which leads to increasing
machine speed. If this happens, the service brakes MUST
ALSO BE USED.
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