CIRCLE AS 6G2944 - Caterpillar

c) Remove O-ring seal (30) and seal (31) from the piston. d) Remove bushing (32), washer (33) and seal (34) from the valve body. 11. Remove two bolts (35). Remove the apron cylinder valve spool and spring housing as a unit from the control valve housing. 12. Pull spring housing (37) off of apron cylinder spool (36) by hand. Approximately 60 lb. (265 N) of force is needed to remove the spring housing.13. Disassemble the apron cylinder spool and spring housing as follows: a) Put spring (39) under compression until ring (41) can be removed. Release the tension on the spring slowly and remove retainer (40), the spring and retainer (38) from the valve spool. b) Remove ring (42) from the housing with tool (A). Remove retainer (43) and four balls (46).c) Remove ring (47) with tool (A), retainer (44) and spring (45) from the housing.14. Disassemble the bowl cylinder valve spool as follows: a) Remove two bolts (48) and housing (49). b) Remove bowl spool assembly (50) from the control valve housing. c) Put spring (52) under compression and remove ring (55). Release the tension on the spring slowly and remove two spacers (57), spring (54), retainer (53), washer (56) and spring (52) from valve spool (51). 15. Remove two bolts (59) and cover (58) for the relief valve. Check the condition of the O-ring seal in the cover. If the seal has damage, use a new part for replacement. 16. Remove spring (60) and relief valve assembly (61) from the control valve housing. 17. Disassemble the relief valve as follows: a) Remove the piston assembly from valve (62).b) Remove pin (68), cap (65), shims (67), spring (64) and valve (66) from piston (63). 18. Remove three O-ring seals (69) from the control valve housing. Check the condition of the seals. If the seals have damage, use a new part for replacement. 19. Remove cover (70) from the control valve housing.20. Remove seal (71) from the cover.21. If necessary, remove the other two covers from the control valve housing. 22. Remove seal (72) from the control valve housing. If necessary, remove the other two seals from the housing.Assemble Scraper Hydraulic Valve
1. Make sure all the parts of the scraper hydraulic control valve are clean and free of dirt and foreign material before it is assembled. 2. Install seal (1) in the control valve housing with the lip of the seal toward the inside of the housing. Put clean oil on the lip of the seal.3. Install the other two seals (1) if they were removed. 4. Install the lip type seal in cover (2) with tooling (A). Install the seal with the lip toward the outside of the cover and until it makes contact with the bottom of the counterbore in the cover.5. Install cover (2) on the control valve housing and the two bolts hold it. Install the other two covers if they were removed.6. Put clean oil on the lips of the seals.