120 Maintenance Section Fuel System Secondary Filter Number One - Replace NOTICE Do not fill fuel filters with fuel before installing them. Contaminated fuel will cause accelerated wear to fuel system parts. Note: Lower filter (1) has not been drained. The filter contains fuel. When you remove the lower filter, use caution in order to avoid spilling the fuel. 4. Inspect the fuel filter element for debris by cutting the filter open. Discard the used fuel filter element properly. Open the engine access door. The secondary fuel filter is located on the right side of the machine. 5. Clean the filter mounting base. Make sure that all of the used seal is removed from the filter mounting base.
Note: This machine is equipped with two secondary spin-on filters on a single filter base. The upper filter is upside-down. Always drain the inverted filter before you remove either filter. g00101318 Illustration 197 g00810175 Illustration 196 6. Apply a thin coat of clean diesel fuel to the sealing surface of the new fuel filter element. 1. To drain upper filter (2) (inverted filter), place a suitable container under the drain valves and open drain valve (3). Then, immediately open drain valve (4) and allow the fuel to drain into the suitable container. 7. Install the new fuel filter element by hand.
When the seal contacts the filter base, tighten the fuel filter element by an additional 3/4 turn. This will tighten the fuel filter element sufficiently. Rotation index marks are positioned on the filter at 90 degree intervals. Use these rotation index marks as a guide when you tighten the filter. When the fuel stops draining, keep the drain valves open and loosen upper filter (2) by a 1/4 turn. As the filter is loosened, additional fuel may drain from the drain valves. Keep turning the filter by 1/4 turns until fuel does not drain from the drain valves. Then, close the drain valves and properly dispose of the fuel. 8. Prime the fuel system. Reference:
Refer to Operation and Maintenance Manual, “Fuel System - Prime” for the correct procedure. Note: Make sure that the drain valves are opened in the proper order. If you open the wrong drain valve first, an air lock in the fuel system may occur. This will not allow fuel to drain from the upper filter. 9. Close the engine access door. 2. Hand tighten the upper filter until the seal contacts the filter base. Then, tighten upper filter (2) by an additional 3/4 turn. Rotation index marks are positioned on the filter at 90 degree intervals. Use these rotation index marks as a guide when you tighten the filter. 3. Remove lower filter (1).