SPRING A. 8F8837 - Caterpillar

Illustration 21 g02837637
(A) Injector sleeve (9) Roller expander
Put a coating of clean engine oil on roller expander (9). Make sure that the rollers are completely covered with oil.
Pull the mandrel out of roller expander (9), as far as possible. While holding the mandrel out, insert roller expander (9) all the way into injector sleeve.
Install 214-6625 Socket (24) or equivalent on a 4C-6936 Torque Wrench or equivalent. Put the torque wrench with socket (24) on the hex portion of the roller expander mandrel. Turn the torque wrench in a clockwise (CW) direction until a torque of 11 N m (97.4 lb in) is achieved, or the turning torque stops increasing.Note: A click-type 4C-6936 Torque Wrench is more convenient to use for the operation in Step 20, although a dial-type 9S-7354 Torque Wrench is to be used, set the dial for 11 N m (97.4 lb in).
When the specified torque is reached, or the turning torque stops increasing, stop turning the roller expander in the clockwise (CW) direction. Now turn the roller expander in the counterclockwise (CCW) direction until it is loose inside the injector sleeve.
Remove roller expander (9) from injector sleeve (A) .
Clean roller expander, especially the rollers, to remove any traces of retaining compound, that may have come from the injector sleeve.Note: When the use of roller expander (9) is completed, clean it thoroughly using either 1U-8803 Cleaner Concentrate or 4C-4079 Component Cleaner . After cleaning, put a coat of either 1U-8265 Penetrating Oil or 1U-8809 Rust Preventative on the roller expander. Store in tool case.
Wipe away any excess lubricant or retaining compound that may be in either the injector bore or in the injector sleeve.
Install previously selected guide bushing (3) or (4) into the cylinder head injector bore.
Guide bushing (3) or (4) must be used to make sure that the reamer is properly centered in the hole and to prevent cutting the injector sleeve too deeply. If the reaming procedure is not done correctly, the injector sleeve must be removed and replaced.
Illustration 22 g02837638
(2) Reamer Assembly (3) or (4) Guide Bushing
Apply a generous amount of clean grease to the cutting area of reamer assembly (2). This will not only lubricate the reamer assembly, but it will help to retain the cutting chips from the reaming process. Cutting chips will be kept from falling on top of the piston.
Insert reamer assembly (2) into guide bushing (3) or (4) .
For correct sealing of combustion gas, the injector seat must be free of machining chatter and scratches, including vertical lines left by the reamer at the end of the cut.
Using a 1U-7153 Speed Handle , with light, but even pressure, turn reamer assembly (2) in the clockwise (CW) direction. The reamer assembly will cut aggressively. If there is an obstruction directly over the hole, use a 6V-0094 Universal Joint in the reamer assembly.Check cutting progress often. Stop cutting when the injector seat is full faced or when the shoulder of reamer assembly (2) comes in contact