COOLER 5415322 - Caterpillar

REMOVING THE SHAFT NUT FROM THE DRIVE
The shaft nut needs to be removed by drilling it off the spindle and pulling it apart in two halves from the spindle threads. To accomplish this you would do the following:a. Prepare the drive on a large drill press with shaft nut facing up and the tapered roller bearings facing down.b. Start drilling one side of the shaft nut close to one of the dowel pins with an approx. 1/2"drill bit. Clean away metal scrap from drilling as you drill to ensure no material gets lost within the drive. Drill down to, but do not hit the tapered roller bearing surface.c. Drill another hole next to the one you just completed and keep working your way outward until that side is drilled out.d. Go 180 degrees around the shaft nut and start the process over again near the other dowel pin.e. Once you complete your drilling use a chisel to open up each side where you completed your drilling.f. Separate the shaft nut and pull it away from the threads, this may be difficult due to the loctite on the threads.g. Clean area from all materials and wire brush the threads clean on the spindle.INSTALLING TAPERED BEARINGS & FACE SEAL & SHAFT NUT
Before any assembly of the final drive can take place, the new shaft nut (19) must be lapped onto threads of the spindle. To do this:a. Apply a valve-lapping compound to the thread of the spindle (1).b. The new shaft nut should be worked onto and off the threads until the nut can easily be screwed on and off by hand. This procedure insures that the best torque setting can be reached when setting pre-load.c. Thoroughly wash the spindle and nut to remove traces of the grinding compound.d. Thoroughly clean all parts of the final drive before proceeding with the assembly.1. Install the cup portion of the bearings (20) in the ring gear output flange (49). Mark the parts of both bearings so that the cup and cone can be matched. Be sure to drive the cups fully against the shoulders. Use a soft brass punch to protect the bearing cups. It is recommended that the cup be cooled with dry ice or liquid nitrogen to help during installation.2. Instal the cone of the inner tapered bearing (20) onto the spindle (1).3. Install one half of the face seal (21) in the ring gear output flange (49) and the other half in the spindle (1). Be careful not to damage the metal face of the seal or cut the o-rings during installation. Wipe the face of the seal with a lint free cloth to remove and contaminants. Do not use oil on the O-rings of the seal during installation.4. Lower the ring gear output flange (49) onto the spindle (1). Take care not to damage the seal.5. Install the cone of the outer tapered bearing (20) and the new shaft nut (19), shaft nut should be installed with the