OPERATING INSTRUCTIONS RH 40 E Operation Pipe burst protection
Speed reduction function
The pipe burst protection prevents uncontrolled lowering of the working equipment if a hydraulic line to the boom cylinder bursts.
Do not activate the speed reduction function when the machine is used for lifting operations and during travelling.
The hydraulic port on the rod-side of the boom cylinder is blocked off so that the hydraulic oil in the cylinder can flow out only if the "boom lowering" function is activated.
The speed reduction function can cause the hydraulic output to drop off suddenly.
When a hydraulic line has broken: " Warn persons in the vicinity of the machine by sounding the signal horn. Stop working. " Secure the area within reach of the working equipment and the attached load. Persons must be prevented from entering the hazard zone under the working equipment or the suspended load.
The speed reduction sets the drive engine back to idling speed if the working equipment remains inactivated during more than 10 seconds.
" Replace the broken hydraulic line or have it replaced before continuing the work. " Absorb spilt hydraulic oil and dispose of oilsoaked cleaning rags, binding agents, etc. without polluting the environment.
Fig. 2-60:
Switching on the speed reduction: " Set toggle switch to the left (57, Fig. 2-60:) Indicator lamp (27, Fig. 2-61:) lights up when the the speed reduction function is active. Switching off the speed reduction: " Set toggle switch (57) to the left.
Fig. 2-61:
BA RH40E(3 664 930.00)-EN
2-63
