IDLER GP-TRACK 3570240 - Caterpillar

To prevent personal injury, release the pressure in the air reservoir and the brake hydraulic system before any lines are disconnected.
2. Use a syringe to remove the brake fluid from the brake reservoirs.
Do not allow brake fluid to contract painted surfaces because brake fluid will damage the paint.
3. Remove high pressure tube (8), and disconnect tube (6).4. Disconnect supply tubes (5) and (7) at the master cylinders.5. Disconnect hose (3) to the air chamber tee.6. Disconnect wires (1) and (4) at the pressure switches.7. Disconnect two clips (2).8. Remove the bolts that hold the bracket for the brake air/hydraulic cylinders to the frame. Remove the brake air/hydraulic cylinders and bracket. 9. Mark air hose assembly (9) orientation at air chambers (10).10. Remove brake air/hydraulic cylinder groups (10) from bracket (11). The following steps are for installation of the brake air hydraulic/cylinder group.11. Install the brake air/hydraulic cylinder groups on brake (11).12. Connect air hose assembly (9) to the air chambers in their original orientation.13. Install the brake air/hydraulic cylinders and bracket.14. Connect the tubes, hoses and wires to the brake air/hydraulic cylinder group.15. Fill the brake reservoirs with brake fluid to the correct level. See the Maintenance Guide.16. Remove (bleed) the air from the brake system. See Remove Air From The Wheel Brake Hydraulic Circuit (Bleed The Brakes) in Testing And Adjusting.END BY:a. separtion of steering frame lock linkDisassemble Brake Air/Hydraulic Cylinder Group
START BY:a. remove brake air/hydraulic cylinder group 1. Remove nuts (3), and separate cylinder (1) from tube assembly (2). 2. Insert a wrench through spring (4) to remove nut (5) and the piston assembly from tube assembly (2).3. Remove switch assembly (6) and the rod indicator from tube assembly (2). 4. Put a small amount of compression on spring (4). Use tool (A) to remove the retaining ring from the shaft. 5. Remove piston (7), retainer valve (9), retaining ring (8), nut (5) and spring (4) from piston assembly (10). 6. Remove vee seal (11) from piston (7). 7. Remove seal valve (12) from retainer valve (9). 8. Remove vee seals (13) and O-ring seal (14) from nut (5). 9. Remove two nuts (15) and the washer from the piston assembly. 10. Remove seal carrier (21) from shaft (19).11. Remove spring (22) and felt seal (18) from the seal carrier.12. Remove piston cup (16) from piston (20).13. Remove O-ring seal (17) and piston (20) from shaft (19).Assemble Brake Air/Hydraulic Cylinder Group
To prevent complete failure of the brakes, lubricate all seals only with Dot 3 Brake Fluid during assembly of the brake air/hydraulic cylinder group. Do not use any petroleum base lubricants such as engine oil. This will cause the seals to enlarge and result in early failure of the cylinder group.
1. Install piston cup (7) on piston (1) as shown.2. Install piston (1) on shaft (6).3. Install O-ring seal (4) on shaft (6).4. Install spring (2) and felt seal (8) on seal carrier (3).5. Install seal carrier (3) on the piston assembly and install washer (5)