CORE AS-AFTERCOOLER 3498239 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 278-4138 Fuel System Protection Gp(1) 1
(1) This tool can only be used one time.
Do not open the high pressure fuel system without allowing the fuel system to purge. After the engine has shut down, allow the fuel system to purge for ten minutes. This operating fuel system contains high pressure. Exposure to high pressure fuel can result in personal injury.
Note: Use Caterpillar Electronic Technician (ET) to verify that the fuel system pressure is at zero before opening the fuel system.Note: Use Tooling (A) after any fuel line has been disconnected.
Ensure that number four piston is at the top center position on the compression stroke. Refer to Systems Operation, Testing and Adjusting, "Finding Top Center Position for No. 4 Piston".
Illustration 1 g03880533
Remove bolts (1) and cover (2).
Illustration 2 g06050644
Mark the alignment of the pump gear and the idler gear for installation purposes. The alignment mark is shown at the location with the arrow in Illustration 2. Remove nut (4). Use a suitable gear puller to remove gear (3).
Illustration 3 g03880622
Disconnect tube assembly (6), tube assembly (9), and hose assembly (5).
Remove nuts (7) and fuel injection pump (8).