OPERATOR AR 1248710 - Caterpillar

1. Disconnect lines (1) and (3).2. Disconnect all the lines from the system protection valve.3. Remove system protection valve from the air dryer.4. Disconnect line (4) and electrical connection (5) from beneath the air dryer.5. Remove four bolts (6), (7), (8) and (9) that hold the straps around the air dryer.6. Remove air dryer (2). The following steps are for the installation of the air dryer.7. Put air dryer (2) in position in the straps and install bolts (6), (7), (8) and (9).8. Connect electrical connection (5) and line (4) to the underside of the air dryer.Install system protection valve on the air dryer.9. Connect all lines to the system protection valve.10. Connect line (1) and (2).Disassemble & Assemble Air Dryer
Start By:a. remove air dryer
Air under pressure can cause personal injury. Before working on or around the air systems and components observe the following precautions.
a. Move the machine to a smooth and level location away from other working machines and personnel. Block the wheels and stop the engine.b. Keep clear of actuator pushrods and linkages when the system is being operated in any way.c. Do not remove plugs or lines, or disassemble components unless you are sure that all air pressure is exhausted.d. Do not disassemble a component unless you have read and understood the correct procedures. Some components contain powerful springs. Injury can result from incorrect disassembly. 1. Loosen the bolts (1) and turn the clamps (2) 90° as shown. 2. Push in on end cover assembly (5).3. Put a screw driver in notch (3) and remove retainer ring (4). 4. Remove end cover assembly (5). 5. Using a 3/4 in. socket wrench, remove the oil filter (6), the desiccant cartridge (7) and desiccant sealing plate (8) as an assembly. 6. Remove the nut (9) and desiccant sealing plate (8). 7. Remove the O-ring seals (13).8. Remove clip (10) and ball check valve (11) under the clip.9. Clean the desiccant plate in a solvent. Make sure the purge valve orifice (12) and check valve seat are open and clean. 10. Put some of the lubricant from the repair kit on new O-ring seals (13) and put them in their respective grooves.11. Install a new ball check valve (11). Install the clip (10). 12. Remove the seat (14) and spring (15). 13. Remove the plate (16) and desiccant material (17) from the cartridge shell (18). 14. Remove bolt (21), washer (19) and oil filter (20). 15. Remove the plate (22) from the cartridge shell.16. Clean the bolt and washer and the inside and outside of the cartridge shell. 17. Put a new plate in the bottom of the cartridge shell with the felt side (cloth side) up. The cloth side of the plate is always towards the desiccant. 18. Put the washer (19) and a new oil filter (20) on the bolt (21). Be sure the side of the oil filter that has the gasket on it is next to the bottom of the cartridge shell (18).