COUPLING AS-PERMANENT 1530785 - Caterpillar

DISASSEMBLY
1. Remove the cable drum as described on pages 20 through 22 of this manual.2. Place the cable drum on a suitable work surface. The seals (187) must be removed to gain access to the drum bearings. Next, remove the spiral retaining ring (188) and the spacer ring (189) from the drum. Inspect the drum bearings (190) while installed in the drum. If scored, heat discolored, or damaged in any other way, they should be removed and replaced. The bearings should only be removed if replacement is necessary as unintentional damage may occur during the removal process. 3. To remove the drum bearings, drive the bearing cones from the drum bore using a long, soft metal punch. Remove the inner bearing cups using a multi-jaw puller or by welding pulling lugs directly to the cups. Either method will destroy the bearing cups and require replacement.ASSEMBLY
1. Chill the inner bearing cup in dry ice to shrink the diameter to aid installation. Install the bearing cup into the drum bearing bore. Use a .002 in (.05 mm) feeler gauge to make certain the cup is fully seated against the drum barrel shoulder.2. Lubricate the bearing cones with winch oil and install into the bearing cup. The bearing cones will be back-to-back with the large end of the cones in contact with each other.3. Chill the outer bearing cup, as previously described, and install into the drum against the bearing cones. Take care during assembly to avoid damaging the bearing cage on the cone.4. Install the spacer ring, then the spiral retaining ring into the cable drum.5. Apply a non-hardening sealing compound to the outside surface of the seal housing at installation. With the drum seal properly positioned in the drum bore, place a large steel plate over the seal for protection and press or drive it into place. The cable drum is ready for installation as described on the following page.6. To maintain alignment, alternately install the ring gear and then the brake housing assembly into the cable drum bearings. The bearings have a snug slip-fit which requires extreme care during installation.