ISOLATOR AS 1785048 - Caterpillar

1. Drain the oil from the steering hydraulic tank. 2. Disconnect lubrication lines (2) from each end of the cylinder.3. Disconnect two hoses (3) from steering cylinder (1).4. Loosen the nuts while holding the ballstud from turning with tool (A) on each end of the steering cylinder until the nut is even with the bottom of the ballstud. 5. Place 231-4905 Wedge (B) in between the steering cylinder and the steering arm as shown. Strike tool (B) with a hammer in order to loosen the ball stud from the taper. Repeat this step for the remaining ballstuds.6. Secure steering cylinder (1) to a floor jack. Remove the two nuts from the ballstuds, and remove the steering cylinder. The weight of the steering cylinder is 88 kg (194 lb). The following steps are for installation of the steering cylinder.7. Put 4C5593 Thread Lubricant on the threads and taper of the ballstuds.8. Fasten steering cylinder (1) to a floor jack. Put the steering cylinder in position, and use tool (A) to hold ballstud from turning Install the nuts on the ends of the ballstuds. Tighten the nuts to a torque of 2060 100 N m (1520 75 lb ft).9. Connect two hoses (3) to the steering cylinder.10. Connect lubrication lines (2) to each end of the steering cylinder.11. Fill the steering system hydraulic tank with oil to the correct level. See the Maintenance Guide.12. Start the machine, and turn the wheels full right and full left several times to remove the air from the steering hydraulic system.13. Check the level of oil in the steering system hydraulic tank again.Disassemble Steering Cylinders
Start By:a. remove steering cylinders 1. Put the cylinder into position on tool (A). 2. Install support (3) under the rod, and fasten strap (2) to hold the rod on the support.3. Remove four bolts (1) and washers from the head. Remove the rod and the head from the cylinder. 4. Remove the nut from the rod with tooling (B).5. Remove piston (4) from the rod. 6. Remove wear ring (5) and seal assembly (6) from the piston. Inspect the seals and ring, and make replacements as needed. 7. Install two 7/8" - 9 NC bolts through the head and in the cylinder. Move the rod out of head (7).8. Remove head (7) and the bolts from the cylinder. 9. Remove O-ring seal and back-up ring (8) from outside of the head. Inspect the seal and ring, and make replacements as needed. 10. Remove seals (9) from inside the head. Make replacements as needed.Assemble Steering Cylinders
1. Install the lower seal and center seal in the head with tool (B). Install the seal ring in the lower groove and center seal with the lip of the center seal toward the outside of the cylinder. Install the outer seal with tooling (A). The lip of the outer seal must be toward the outside when installed. 2. Install the O-ring seal and back-up ring on the outside of the head with