HITCH AS 1757698 - Caterpillar

1. Drain the oil from the hydraulic tank.
Make sure all the pressure in the hydraulic system has been released before disconnecting any oil lines.
Typical Example2. Disconnect oil lines (1) from the bottom of the hoist cylinder.3. Disconnect lubrication line (2) from the hoist cylinder.
Typical Example4. Fasten chain (4) to hoist cylinder (3) to support the cylinder when the top pin is removed.
Typical Example5. Remove the bolts and bar (5) that hold the top pin in place.
Typical Example6. Remove the top pin with tooling (A). Remove the two spacers.
Typical Example7. Install tool (B) on the bucket of a wheel loader or a suitable hoist.8. Put tape on the hoist cylinder rod for protection when tool (B) is installed. If a nylon strap is used, the tape is not necessary.9. Fasten a chain or nylon strap and tool (B) to hoist cylinder (3). Support the weight of the hoist cylinder with tool (B).
Typical Example10. Remove the bolts and cover (6) from the lower hoist cylinder pin.
Typical Example11. Remove bolt (7) and plate (8). 12. Use the three threaded holes at the bottom of the hoist cylinder to install tooling (C) as shown.13. Remove hoist cylinder (3) from the machine. The weight of hoist cylinder is 1150 kg (2535 lb). The following steps are for the installation of the hoist cylinders.14. Install tool (B) on the bucket of a wheel loader.15. Fasten tool (B) to a hoist cylinder (3). Put the hoist cylinder in position on the bottom pin.16. Install plate (8) with bolt (7).17. Install cover (6) with three bolts.18. Align the end of the hoist cylinder with the pin boss in the truck body, and install the top pin with the two spacers.19. Install bar (5) and the bolts to hold the pin in place.20. Connect oil lines (1) to the bottom of the hoist cylinder.21. Connect lubrication line (2).22. Fill the hydraulic tank with oil to the correct level. See the Operation & Maintenance Manual.Disassemble Hoist Cylinders
Photos are from a 785 Truck. Procedures are similar for a 793B Truck. Start By:a. remove hoist cylinders Make sure all of the oil is removed from the cylinder before it is disassembled. 1. Put the hoist cylinder in position on tooling (A) as shown. 2. Remove bolts (1) and the washers. Use tool (A), and pull cylinder assembly (3) away from head (2). 3. Put two wood blocks (5) 152.4 mm (6.00 in) long between the cylinder assembly and head (2) as shown. Use tooling (A) to push head (2) off of cylinder (4). 4. Use tooling (A), and pull cylinder assembly (3) part way off of cylinder (4).5. Put support (6) in position under cylinder (4). Remove cylinder assembly (3) the rest of the way.6. Fasten a hoist to cylinder assembly (3), and remove it from tooling (A). The weight of the cylinder assembly is approximately 238 kg (495 lb). 7. Put tape around cylinder (4) to protect the cylinder when it is fastened