PLUG 3J5390 - Caterpillar

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Right side view
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Left side view
Illustration 3 g01398296Universal Warning (1)These messages are located on the valve cover bases near the center of the engine and on the top surface of the control panel.
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Do not operate or work on this engine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manual. Failure to follow the instructions or heed the warnings could result in injury or death. Contact any Caterpillar dealer for replacement manuals. Proper care is your responsibility.
Ether Starting Aid (2)These messages are located on the right side and left side air cleaners.
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Do not use ether. This machine is equipped with glow plugs. Using ether can create explosions or fires that can cause personal injury or death. Read and follow the engine starting procedure in the Operation and Maintenance Manual.
Hot Coolant Under Pressure (3)These messages are located on the top of the expansion tank.
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Pressurized system! Hot coolant can cause serious burns, injury or death. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure. Read and understand the Operation and Maintenance Manual before performing any cooling system maintenance.