BOLT 8S6212 - Caterpillar

Remove Fuel Injectors
Start By:a. remove rocker shafts and push rodsFluid Spillage Containment
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 "Tools And Shop Products Guide", NENG2500 for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose fluids according to local regulations and mandates.1. Turn the fuel supply to the engine to the "OFF" position. 2. Remove inlet fuel tube (1) and outlet fuel tube (2) from the cylinder head. Put caps on the fuel openings. Step 2 must be done to prevent fuel leakage into the combustion chambers and the crankcase.3. Remove locknut (4) and the washer. Disconnect lever assembly (3) from the control rod.4. Remove bolts and remove lever assembly (3) from the cylinder head. 5. Remove bolt (6) and clamp (5) that hold the fuel injector in position.
Do not put a force on the fuel injection rack or cause damage to it when the injectors are removed from the cylinder head.
6. Use a pry bar and loosen injector (7) from the cylinder head. Pull injector (7) out of the cylinder head and remove it from the engine. 7. Remove O-ring seals (8) from the injector.8. If necessary, remove the plug for clamp (5) from the cylinder head.Install Fuel Injectors
1. Use Tool (A) as shown to make sure the fuel injection rack will move freely by its own weight when injector (1) is turned a total of 180 degrees in both directions. Check the rack movement with the injector spring under compression in several positions. To prevent a carbon deposit between the injector and the injector bore, make sure the injector body (especially the tapered area) and the injector bore are clean and free of foreign material. 2. Make sure the three O-ring seals (2) are installed on injector (1) and put clean engine oil on the seals and in the bore for the injector. 3. Make sure the plug that the anvil of clamp (5) sets on is installed in the top of the cylinder head.
Do not tap or hit on the injector follower to install the injector. Damage and failure of the injector can be the result.
4. Put injector (1) in position in the cylinder head. Install clamp (5) and tighten the bolt and washer to push injector (1) all the way into its bore. Tighten the bolt to a torque of 65 7 N mm (48 5 lb ft).5. Check to make sure the fuel injection rack moves freely by hand in the injector after the injector is installed.6. Put lever assembly (6) in position. Connect the lever assembly to control rod (7) and make sure lever assembly (6) is engaged correctly with the fuel injection rack. Install the two bolts to hold the lever assembly in place.7. Remove the caps from the fuel