Ch 5 page 25 HYDRAULIC SYSTEM Test block The Test Block is the place where it is possible to check all the main pressures from the hydraulic system. Through the test ports, it is possible to diagnose the maximum and minimum values of the hydraulic pressures of each part of the system. The sensors (140, 141, 142, 143, 144 and 145) send the pressure signal to the VCU-2 so it shows the values on the LCD display. Test Ports Sensors Figure 18 P1M (140) P1M= Pump 1 measure pressure: 280 to 286 bar LSP1M LSP1M= Load sense pump 1 measure pressure: (P1M - 20) bar B (141) B= Tilt cylinder lowering pressure: 80 to 105 bar FDM PDM= Fan drive motor pressure:
245 to 260 bar ACC1 (142) ACC1= Accumulator pressure: 203 to 210 bar LSOM LSOM= Load sense orbitrol measure pressure: 187 to 197 bar ACC2 (143) ACC2= Accumulator pressure: 203 to 210 bar PS PS= Pilot servo pressure: 33 to 40 bar ACC3 (144) ACC3= Accumulator pressure: 203 to 210 bar TMPR TMPR= Transmission control pressure: 16 to 18 bar A (145) A= Tilt cylinder raising pressure: 280 to 286 bar SHOP MANUAL