VALVE GP-RELIEF 1163601 - Caterpillar

START BY:a) separation of tractor from scraper 1. Install a hoist on each of the two link assemblies (1). Remove yokes (3) and washer (2) that fasten pin in position. 2. Remove pin (5), retainer (4) and link assemblies (1). The weight of each link assembly is 41 kg (90 lb.). 3. Remove plate assembly (7) and shield assembly (6) from the hitch group. 4. Put identification on six tube assemblies (8), (9) and (10) and remove them from the implement control valve. Tube assemblies (9) are connected to the elevator control valve. Tube assemblies (8) are connected to the scraper control valve.
Do not disconnect any air lines until the air system pressure is zero. Failure to do so can result in personal injury.
5. Remove five clamps (14) that fasten tube assemblies in position. Disconnect tube assembly (12) and vent line (11) from the implement control valve. Remove hydraulic line (13). 6. Remove eight bolts, cover (15) and gasket from box assembly (16). 7. Remove three pins (17) that fasten the rod end of linkages to the valve spools. Remove the six bolts that fasten the box assembly to the bottom of the implement control valve. 8. Install a strap and hoist on the implement control valve. Remove tube assembly from location (E). Remove three bolts (18) that fasten the implement control valve to the hitch. Weight of the implement control valve is 39 kg (85 lb.). 9. Make a note of where the hose and tube assemblies are installed and remove the clamps (19) that fasten them in position. 10. Put identification on three hose assemblies (20) and disconnect them from the elevator control valve. Remove clamp (21) from hitch. 11. Install a strap and hoist on the elevator control valve (22). Remove two bolts (23) and the valve and hose assemblies as a unit. 12. Install nylon straps and hoist on hitch as shown in Step 18, Illustration B71352X1. Remove bolts and plates (24) from each side of hitch pin nut. Remove nut (25) from pin assembly with tool (A). 13. Remove cotter pin from shaft. Remove nut (26) from shaft with tool (B). 14. Remove two bolts (28) that fasten rear pin assembly (27) to hitch. 15. Install three 1/2"-13 NC bolts (29) in collar (30) and remove collar from hitch. The collar is tapered. 16. Install tooling (C) to loosen front pin from the tapered bore.17. Remove front and rear pins. 18. Remove hitch assembly (31) from the vehicle. The weight of the hitch assembly is 680 kg (1500 lb.).Install Hitch
1. Put straps and hoist on hitch (1) and put it in position on the front frame. 2. Install rear hitch pin (2). 3. Install front shaft and collar (4). Install nut (3) and tighten to a torque of 510 34 N m (376