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Personal injury or death can result from a fire. Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire. Clean up all leaked or spilled fuel. Do not smoke while working on the fuel system. Turn the disconnect switch OFF or disconnect the battery when changing fuel filters. |
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| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of all fluids according to local regulations and mandates. |
| NOTICE |
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Do not fill fuel filters with fuel before installing them. Contaminated fuel will cause accelerated wear to fuel system parts. |
Lower Secondary Filter Element
- Open the engine access door on the right hand side of the machine.
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| Illustration 1 | g00852053 |
- Place a suitable container under the valves (2) and (4). Open the valve (2) in order to drain the upper secondary fuel filter element (1). Immediately open the drain valve (4) after opening the drain valve (2). This sequence prevents an air lock in the fuel system.
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| Illustration 2 | g00852054 |
The location of the secondary fuel filters | |
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| Illustration 3 | g00592665 |
Note: You must drain the secondary fuel filter element (1) before the removal or the replacement of either filter element.
- Slightly loosen the upper secondary fuel filter element (1) by 90 degrees. As the filter is loosened, additional fuel may drain. Loosen the filter by another 90 degrees, and continue loosening the filter in 90 degree increments until no fuel drains from the drain valves.
- Close the drain valves (2) and (4) .
- If the upper secondary fuel filter element is not being replaced, tighten the element. When the gasket contacts the filter base, turn the filter by 270 degrees more. This will tighten the filter sufficiently.
- Remove the lower secondary fuel filter element (3). Use caution when you remove the element in order to avoid spilling the fuel that is in the element.
Note: The upper secondary fuel filter element and the lower secondary fuel filter element are different part numbers.
- Install a new lower secondary filter element. In order to prevent contamination of the fuel system, do not fill the element with fuel before you install the filter element. When the gasket contacts the filter base, turn the filter by 270 degrees more. This will tighten the filter sufficiently.
Note: Every new fuel filter has rotation index marks that are spaced at 90 degree increments. Use the rotation index marks as a guide for tightening the fuel filter.
- Prime the fuel system. See the Operation and Maintenance Manual, "Fuel System - Prime".
- Start the engine and check for leaks.
- Close the engine access door.
Upper Secondary Filter Element
- Open the engine access door on the right hand side of the machine.
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| Illustration 4 | g00852056 |
- Place a suitable container under the valves (2) and (3). Open the valve (2) in order to drain the upper secondary fuel filter element (1). Immediately open the drain valve (3) after opening the drain valve (2). This sequence prevents an air lock in the fuel system.
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| Illustration 5 | g00852059 |
The location of the secondary fuel filters | |
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| Illustration 6 | g00745989 |
Note: You must drain the secondary fuel filter element (1) before the removal or the replacement of either filter element.
- Slightly loosen the upper secondary fuel filter element (1) by 90 degrees. As the filter is loosened, additional fuel may drain. Loosen the filter by another 90 degrees, and continue loosening the filter in 90 degree increments until no fuel drains from the drain valves.
- Close the drain valves (2) and (3) .
- Remove the upper secondary fuel filter element (1). Use care in order to avoid spilling fuel from the filter element as you remove the element.
- Install a new upper secondary filter element. In order to prevent contamination of the fuel system, do not fill the element with fuel before you install the filter element. When the gasket contacts the filter base, turn the filter by 270 degrees more. This will tighten the filter sufficiently.
Note: Every new fuel filter has rotation index marks that are spaced at 90 degree increments. Use the rotation index marks as a guide for tightening the fuel filter.
Note: The upper secondary fuel filter element and the lower secondary fuel filter element are different part numbers.
- Prime the fuel system. See the Operation and Maintenance Manual, "Fuel System - Prime".
- Start the engine and check for leaks.
- Close the engine access door.