SPRING 3G9859 - Caterpillar

Coolant System
Pressurized system: Hot coolant can cause serious burn. To open cap, stop engine, wait until radiator is cool. Then loosen cap slowly to relieve the pressure.
To relieve the pressure from the coolant system, turn off the engine. Allow the cooling system pressure cap to cool. Remove the cooling system pressure cap slowly in order to relieve pressure.Fuel System
To relieve the pressure from the fuel system, turn off the engine. High Pressure Fuel Lines (If Equipped)
Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fuel spray may cause a fire hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.
The high-pressure fuel lines are between the high-pressure fuel pump and the high-pressure fuel manifold. The fuel lines are also between the fuel manifold and cylinder head. These fuel lines are different from fuel lines on other fuel systems because of the following differences:
The high-pressure fuel lines are constantly charged with high pressure.
The internal pressures of the high-pressure fuel lines are higher than other types of fuel system.Before any service or repair is performed on the engine fuel lines, perform the following tasks:
Stop the engine.
Wait for 10 minutes.Do not loosen the high-pressure fuel lines in order to remove air pressure from the fuel system.Engine Oil
To relieve pressure from the lubricating system, turn off the engine.Transmission
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Trapped Pressure
Pressure can be trapped in a hydraulic system. Releasing trapped pressure can cause sudden machine movement or attachment movement. Use caution if you disconnect hydraulic lines or fittings. high-pressure oil that is released can cause a hose to whip. high-pressure oil that is released can cause oil to spray. Fluid penetration can cause serious injury and possible death.