SPOOL-DIFFERENTIAL 6Y3032 - Caterpillar

Personal injury or death can result from improperly checking for a leak.Always use a board or cardboard when checking for a leak. Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury and possible death.If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.
Move the machine to a smooth horizontal location. Move away from other machines and personnel. Lower all work tools to the ground.
Permit only one operator on the machine. Keep all other personnel away from the machine.
Engage the parking brake.
Stop the engine.
Move the hydraulic control levers to all positions so that the pressure in the hydraulic system is released.
Loosen the filler cap on the hydraulic tank so that the pressure in the tank is released.
Tighten the filler cap on the hydraulic tank.
The pressure in the system has now been released and lines or components can be removed.During a diagnosis of the hydraulic system, remember that correct oil flow, temperature, and pressure are necessary for correct operation. The output of the pump (oil flow) increases with an increase in engine speed (rpm) and decreases when engine speed (rpm) is decreased. Oil pressure is caused by resistance to the flow of oil.Use 1U-5481 Pressure Gauge Group, 1U-5482 Pressure Adapter Group, 4C-4890 Hydraulic Test Group, a watch, a magnet, a thermometer, and a ruler in order to perform the tests.