System Description

The machine is equipped with a so-called "open-center hydraulic system", i.e. with engine running at constant speed the hydraulic pump conveys a constant amount of hydraulic oil.

    There are four hydraulic pumps:

  • Pump (A) conveys 53 L/Min. (14 gpm)
  • Pump (B) conveys 36 L/Min. (9.5 gpm)
  • Pump (C) conveys 18 L/Min. (4.8 gpm)
  • Pump (D) conveys 26 L/Min. (6.9 gpm)

For pump (B) a pressure valve is located in the solenoid valve block (E). If no pressure oil is required, the valves direct oil back to the tank via the oil cooler.

Oil flowing from oil cooler to the tank is partially directed through bevel gear drive (main gearcase) where it is used for lubrication and cooling purposes.

NOTE: A detailed list of solenoid valves can be found in Section "Service - Electrical System".


A-Pump 53 L/Min. (14 gpm) (Automatic Header Control System)
B-Pump 36 L/Min. (9.5 gpm) (Hydraulic System)
C-Pump 18 L/Min. (4.8 gpm) (Steering System)
D-Pump 26 L/Min. (6.9 gpm) (IVLOC Transmission System)
E-Main Solenoid Valve Block, R.H. Side
F-Valve Block - Low Pressure Hydraulic System, R.H. Side

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ZX027858
ZX027859

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