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72171 Figure 5 Retarder disengaged Setting the lever (2) in the rest position 0, the electronic control unit (1) receives no electric signal; therefore, it de-energizes both The control valve (16) switches over, thereby causing the pressure to drop to 0 bars, so the adjustment valve (14) is made to No longer being able to send the pressure P to the switchover valve (8), the spring switches over the slide valve, discharging the Through the holding valve (13) the oil circuit between the pump and heat exchanger (9) maintains a pressure of 1.5 bars, at the 6 INTARDER - ZF HYDRAULIC RETARDER S TRALIS AT/AD Base - January 2003 |