(1) Hydraulic circuit, 3-P, Neutral
New hydraulic lift units are set up to use a 3-point hitch.
① The hydraulic oil that is highly pressurized by the gear pump is fed to the
hydraulic cylinder case.
↓
② After any particles have been removed from the hydraulic oil using an 80-
mesh screen, and if the pressure is below the setting for the relief valve, the
high-pressure hydraulic oil is fed to the control valve mounted under the
hydraulic cylinder case.
↓
③ The hydraulic circuit is switched by the control valve, to move the 3-point
hitch up and down. When the control valve is in the neutral position, the
hydraulic oil under pressure is returned to the transmission through the
unload valve.
IMPORTANT
If the implement is too heavy or the 3-point hitch cannot move because of obstacles in its
way, the hydraulic circuit is protected by a relief valve that opens, which returns the
hydraulic oil to the transmission.
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