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Service Manual
5.2.1 Hydraulic Diagram V/D-Version Driving
Drive pump 10ccm/U
As soon as the engine runs, the feed pump delivers hydraulic fluid into the driving circuit. The fluid is available in the complete circuit
and comes in at the pressure-limiting valves (forward and reverse) as well as at the feed pressure valve. Since feed pressure
adjustment is the lowest, this valve opens and the driving circuit features a pressure of 3.8bar + 0.2bar when the engine is running.
When the drive pump is mechanically shifted to forward (A) or reverse mode (B), a fluid circulation into the specific direction is
generated and, depending on the drive motor resistance, a driving pressure builds up in the circuit. After this pressure attains the
160bar (forward) or the 130bar (reverse), the pressure-limiting valve opens accordingly and protects driving.
Hako GmbH
Technical Service (KUD)
Confidential - For internal use only!
Forward
Reverse
23843 Bad Oldesloe
Drive motor
160ccm/U
Edition: 05/2014
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