MANIFOLD 1809327 - Caterpillar

1. Remove the hood. The weight of the hood for Challenger 65C and 70C Tractor is approximately 40 kg (88 lb). The weight of the hood for Challenger 75C and 85C Tractor is approximately 32 kg (70 lb). 2. Remove six screws (1) and panel (2). 3. Remove foam padding (3). 4. Remove four bolts and washers (4) and plate (5). 5. Disconnect wiring harness (6) below the cab floor. 6. Put identification marks on five cable assemblies (7). Disconnect the cable assemblies and pull them down thru the cab floor. 7. Remove two knob assemblies (8) and pull the two cable assemblies attached to them down thru the cab floor. 8. Remove bolt (9) and disconnect bracket (10) from the wiring harness. 9. Close heater valve (14). Loosen hose clamp (13). Disconnect and cap heater hose (12).10. Remove two bolts (11) that hold heater hose (12) to the engine. 11. Close heater valve (15). Loosen hose clamp (16). Disconnect and cap heater hose (17). 12. Disconnect brake line (18).13. Disconnect four lines (19) at the steering control unit (20). 14. Remove one bolt (21) and disconnect ground strap (22) from the frame.15. Remove three bolts and washers (23) and cover plate (24).16. Disconnect parking brake linkage located under cover plate (24). 17. Disconnect two electrical connections (25). 18. Remove one bolt (26) and disconnect wiring harness (27). 19. Remove two bolts and washers (28) and disconnect cable (29) from the transmission.
Always wear goggles when working on air conditioning systems. The system is under pressure at all times, engine running or not. Escaping refrigerant R-12 (CCl2F2 Dichlorodifluoromethane) or refrigerant R-134A can cause freezing of human flesh.Do not smoke while working on air conditioning systems. INHALING REFRIGERANT R-12 OR REFRIGERANT R-134A THROUGH ANY SMOKING MATERIAL, ALTHOUGH NOT TOXIC OR FLAMMABLE, CAN GENERATE LETHAL PHOSGENE GAS AND CAUSE VIOLENT ILLNESS OR DEATH. ALSO, HEAT MUST NEVER BE APPLIED TO A CHARGED SYSTEM. See Air Conditioning And Heating Service Manual, Form No. SENR3334 and SENR5664, for more information on removal and installation of lines and refrigerant from the system.
Use a refrigerant reclaimer before loosening any lines. 20. Evacuate the air conditioning system.21. Disconnect air conditioning line (30). Remove all bolts and clips (31) securing air conditioning line (30) to the machine. 22. Disconnect air conditioning line (32). 23. Install tooling (A) on top of the cab as shown. Fasten a hoist to cab (33). 24. Remove four cab mounting bolts (34) that hold the cab to the frame of the machine. 25. Slowly raise cab (33) enough to gain access to cable assembly (35).26. Remove two bolts (36) and disconnect cable assembly (35).27. Remove the cab. The weight of the cab is 975 kg (2150 lb).Install Cab (2ZJ500-Up & 2YL227-Up & 4KK500-Up & 9TK231-Up)
1. Fasten tooling (A) and a hoist to the top of cab (33) as shown. Lower the cab to within 152 to 203 mm (6 to 8 in) from the frame of the machine. Connect cable