HOSE AS 3843509 - Caterpillar

At operating temperature, the hydraulic oil is hot and under pressure. Hot oil can cause burns. Remove the fill cap on the hydraulic oil tank only when the engine is stopped, and the fill cap is cool enough to touch with your bare hand.
2. Release the pressure in the hydraulic system by slowly loosening the fill cap located on top of the hydraulic oil tank. 3. Disconnect two hose assemblies (1) from steering cylinder (2). Cap and plug immediately.4. Remove bolt (3) and pin (4) from both ends of steering cylinder (2). Remove steering cylinder (2) and any spacers from the machine. After installing the steering cylinder, lubricate the pins and fill the hydraulic oil tank to the correct level. See the Operation & Maintenance Manual for the correct lubricating and filling procedures. For installation of the steering cylinder, reverse the removal steps.Disassemble & Assemble Steering Cylinder
Start By:a. remove steering cylinder 1. Remove two bolts (11), and slide cover (14) and rod assembly (10) partially out of cylinder assembly (12).2. Push head (5) into the cylinder assembly and remove lock wire ring (8).3. Remove head (5) and rod assembly (10) from cylinder assembly (12).4. Remove nut (1), piston (2), and head (5) from rod assembly (10). Remove O-ring seal (13) from the rod assembly. Check the O-ring seal for damage or wear and replace if necessary. During assembly, tighten nut (1) to a torque of 820 28 N m (600 20 lb ft).5. Remove wear ring (3) and O-ring seal (4) from piston (2). Check the wear ring and O-ring seal for damage or wear and replace if necessary.6. Remove O-ring seal (6) and back-up ring (7) from the outside of head (5). Remove lip-type seal (9), O-ring seal (15) and back-up ring (16) from inside head (5). Check the back-up rings, O-ring seals and lip-type seal for damage or wear and replace if necessary. During assembly of the steering cylinder, put a thin coat of clean oil on the O-ring seals, back-up rings and lip-type seal. For the assembly of the steering cylinder, reverse the disassembly steps.End By:a. install steering cylinder