PRECLEANER AS 7W7508 - Caterpillar

1. Disconnect fuel lines (1). Disconnect the fuel pressure switch and remove drive gear cover (2). 2. Remove four capscrews (3) and remove drive gear (4). 3. Disconnect fuel supply and return hoses, enjector lines, control linkage and air line. 4. Fasten a hoist and remove all nuts and bolts mounting fuel injector pump housing to engine.Install Fuel Injection Pump Housing And Governor
1. Fasten a hoist to the fuel injection pump housing and governor. Be sure the O-ring seals are in position on the fuel injection pump housing and governor, on the timing gear housing. 2. Connect fuel supply and return hoses, injector lines, control linkage and air line. 3. Remove plug (5) from the fuel injection pump housing. 4. Turn the fuel injection pump camshaft until tooling (B), the timing pin, goes into the slot in the fuel injection pump camshaft. 5. Put the No. 1 piston at top center on the compression stroke. Make reference to Finding Top Center Compression Position for No. 1 Piston in Testing and Adjusting. Use tooling (A) to rotate engine chankshaft counter clockwise (the direction of engine rotation) until