CLAAS ACADEMY LEXION II Steering hydraulics Key to diagram 104 - Oil filler and breather screw 107 - Oil drain hose 108 - Oil reservoir for emergency steering . . . . . approx. 250 cmі 109 - Oil cooler 110 - Oil tank 112 - Sieve filter 205 - Gear pump for working hydraulics . . . . . . . 14/19 cmі 208 - Axial piston pump for hydrostatic ground drive 218 - Gear pump for steering hydraulics . . . . . . . 11 cmі 323 - Steering hydraulic ram . . . . . . . . . . . . . . . . . 50/25 mm 410 - Restrictor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 mm 503 - Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . .
0.7 l / 80 bar 604 - Pressure relief bolt 609 - Rotary disc valve 725 - Double shock valve . . . . . . . . . . . . . . . . . . . 200±15 bar 726 - Pressure relief valve . . . . . . . . . . . . . . . . . . . 160 +15 bar 728 - One-way valve (emergency steering) 732 - One-way valve, returns 732 - One-way valve 734 - One-way valve (lock-up valve unit) 742 - One-way valve (emergency steering) 909 - Steering pressure test port B5 - Oil pressure switch, NC contact . . . . . . . . . 135/160±5 bar Z4 - Oil pressure switch, NC contact . . . . . . . . . 135/160±5 bar Y10 - Autopilot solenoid valve Y9 - Autopilot solenoid valve Note 1.
For the LEXION 410 - 405 machines, there is only one steering ram (323) fitted. It is for these machines that the emergency reservoir (108) needs to be fitted, as it counteracts the displacement differences between the two ends of the ram. 2. LEXIONS 480 - 420 from 1999, the emergency reservoir (108) has been left off, as there is two steering rams (323) and no difference between the displacements. Pressure readings Back pressure = 10 +7 bar System pressure = 160 +15 bar (Autopilot 175 +15 bar) Shock valves = 200 ± 15 bar Note: These readings can only be expected with the engine running at a fast idle rate and the hydraulic oil at working temperature of approx. 60°C. 02/2001 2-5