KIT-HYD CYLINDER SEAL 3891371 - Caterpillar

1. Remove guard (1) from over the track adjuster.2. Put two hydraulic jacks (5) under the track roller frame as shown. Lift the track roller frame until the weight is off of the equalizer bar. 3. Fasten a hoist to track carrier roller (3). Remove four bolts (2). Remove the track carrier roller. Weight of the track carrier roller is 130 lb. (59 kg).4. Lower the track roller frame until support (4) can be removed. Remove the six bolts that hold the support in position. Remove the support. Weight of the support is 146 lb. (66 kg). 5. Remove plate (7) from over the rod. Remove bolts (6) that hold the rod to the cylinder. Fasten a hoist to the rod. Remove the rod. Weight of the rod (8) is 100 lb. (45.4 kg).6. Fasten a hoist to the cylinder. Remove piston and cylinder (12) as a unit. Weight of the unit is 70 lb. (32 kg). 7. Remove sleeve (9), piston assembly, ring, seal (13), fill valve (10) and relief valve (11) from the cylinder. Check the rings, washer and seals in the piston assembly for damage. If the parts have damage, use new parts for replacement.Install Pistons And Cylinders
1. Install fill valve (8) and relief valve (7) in cylinder (3). Tighten the valves to a torque of 25 3 lb. ft. (3.5 0.4 mkg). Install the piston (5) in the front end of the cylinder. Install sleeve (6) in the opposite end of the cylinder. Install ring (2) and seal (1) in the cylinder as shown. Install the teflon seal and ring as shown. Install the teflon seal with the lip toward the pressure side of the cylinder. If new rings (4) are installed on piston (5), assemble the rings so the angle cuts are 180° apart.2. Fasten a hoist to the piston and cylinder assembly (9). Install it in the cover of the recoil spring. 3. Fasten a hoist to rod (10). Put the rod in position against the cylinder. Slide the lower plate of the suspension assembly under the rod as shown. Make sure the holes in the rod are in alignment with the holes in the cylinder. Install the bolts and nuts that hold the rod and cylinder together.4. Put plate (12) in position over the rod. 5. Fasten a hoist to support (11). Put the support in position over the suspension assembly. Install the six bolts that hold it. 6. Lift the track roller frame with hydraulic jacks (13) until the sleeve that holds the track roller frame on the equalizer bar can be installed. Install the sleeve, bolt and nut.7. Fasten a hoist to the track carrier roller. Put the track carrier roller in position on the support. Install the four bolts that hold it.8. Install the guard over the track adjuster.end by: a) install yoke assemblies