BLOCK 2S1800 - Caterpillar

4. Remove two O-ring seals (2), two rings (3) and two rings (4) from the grooves in piston assembly (1). 5. Remove two bolts (5) and guard plate (6) from the piston assembly. 6. Remove relief valve (7) and fill valve (8) from the piston assembly. The following steps are for the assembly of the hydraulic track adjuster.7. Thoroughly clean all parts of the hydraulic track adjuster prior to assembly. Check the condition of O-ring seals (2), rings (3) and rings (4). If any of the components are worn or damaged, use new parts for replacement.8. Install relief valve (7) and fill valve (8) in the piston assembly. Tighten each valve to a torque of 34 5 N*m (25 4 lb ft).9. Install guard plate (6) and two bolts (5) that hold it.
To ensure correct operation of the hydraulic track adjuster, O-ring seals (2), rings (3) and rings (4) must be install in the correct positions in the grooves in piston (8).
To distinguish the difference between rings (3) and (4), check their color. Rings (3) are brown in color. Rings (4) are black in color.10. Put clean 5P-0960 Multipurpose Grease in the grooves in piston assembly (1). Install O-ring seals (2), rings (3) and rings (4) in the grooves of the piston, as shown. Turn rings (3) and (4) in the grooves until the split in the rings are 180 degrees apart.11. Thoroughly clean the inside diameter of the recoil group. Put a thin coat of 5P-0960 Multipurpose Grease on the inside of the recoil group.12. Put a thin coat of 5P-0960 Multipurpose Grease on piston assembly (1). Install the hydraulic track adjuster in the recoil group.13. Connect the recoil spring and the hydraulic track adjuster to the front idler. Refer to the topic "Remove & Install Front Idlers, Recoil Springs & Hydraulic Track Adjusters" in this module.End By:a. install front idlers, recoil springs and hydraulic track adjusters