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3-3. Hydraulic system
(1) Safety precautions
Hydraulic oil leaking under pressure can penetrate skin and cause infection or other injury. To
prevent personal injury, comply with the instructions as below.
-. Relieve all pressure before disconnecting hydraulic lines.
-. Before applying pressure, make sure all connections are tight and components are in good
condition.
-. Never use your hand to check for suspected leaks under pressure.
-. If injured by leaking fluid, get medical attention immediately.
The hydraulic hoses and fittings on your tractor meet engineering specifications for the particular
function. When replacing damaged parts, use only manufacture authorized service parts.
Care in hydraulic hose installation is a must:
-. Make sure pressure is relieved before starting installation procedure.
-. DO NOT kink or twist a hose, failure may occur. Properly route the hose.
-. Have a certified hydraulic technician install the hose.
-. Remove air from the hydraulic system after installing any hydraulic component.
Periodically check hydraulic system for leaks or damaged parts - kinked, crushed, flattened, hard
blistered, heat cracked, charred, twisted, soft or loose covered hoses and fittings.
DO NOT pull or apply external forces to the hose. The hose may fail and cause injury.
Keep all persons away from the working area. If a hose fails, mechanisms controlled by fluid power
can become hazardous. Lifted mechanisms can fall to the ground, steering system may fail, etc.
Stay clear of a pressurized hose assembly that has blown apart. Hose fittings can be thrown off at
high speed and a loose hose can whip around with great force.
Hydraulic oil can reach high temperatures.
Wait for all components to cool before you perform any
maintenance or adjustment operation. Do not handle any service fluid (engine coolant, engine oil,
hydraulic oil, etc.) at temperatures that exceed 50
°
C (122
°
F). Allow fluids to cool.
Vibration can reduce hose service life. Make sure all retaining clamps and/or devices are secured.
Environmental conditions can cause hose and fittings to deteriorate.
You must periodically inspect
the hydraulic hoses. See the Maintenance chapter for general inspection precautions. The hoses do
not require any operator-performed maintenance. Always see your authorized local dealer for
hydraulic hose repair or replacement.
Replace worn or damaged hoses and fittings.
Before checking or repairing the hydraulic system, make sure the engine is stopped, and all the
transmission gears are in neutral, and lower the implements to the ground.
Warning
▶
Before removing hydraulic pipes or hoses and other parts, make sure to check that
hydraulic pressure is relieved completely. The leaks of pressurized oil can cause a
fatal physical injury.
▶
Use proper protection equipment, before servicing the hydraulic system.
▶
Before connecting or disconnecting the hydraulic quick couplers, lower the
implements to the ground, and check if the hydraulic pressure is relieved.
