UPPERSTRUCTURE / Control Valve Assemble Boom Anti-Drift Valve 29. Install backup rings (24, 28) and O-rings (25, 26) to sleeve (29). 30. Face the hole on spool (30) to the poppet (23) side. Install spool (30), poppet (23), seat (22) and spring (21) to sleeve (29). Install the sleeve (29) assembly to housing (1). Assemble Arm 2 Flow Rate Control Valve 38. Install O-rings (115, 120) (3 used for each) to plugs (114, 119) (3 used for each) in details D, E and F. 39. Install spool (118), spring (117) and spring seat (116) to body (123) in detail D. Temporarily tighten plugs (114, 119) to body (123). 40.
Install spool (122), spring (121) and spring seat (116) to body (123) in detail F.Temporarily tighten plugs (114, 119) to body (123). 41. Install spool (124), spring (125) and spring seat (116) to body (123) in detail E.Temporarily tighten plugs (114, 119) to body (123). 42. Install poppets (98, 99), spring (100), plug (101), spring (87), poppet (15) and O-rings (13, 77) to housing (1) in detail D. 43. Install poppets (108, 109), spring (110), plug (111), spring (87) and O-rings (77, 78) to housing (1) in detail E. 44. Install poppet (112), spring (113) and O-rings (77, 13) to housing (1) in detail F. NOTE: Apply grease to seat (22) and spring (21) in order not to drop. 31.
Install O-ring (35) to plug (36). Install spring (33), piston (34), O-ring (31) and plug (36) to body (32). 32. Install O-ring (13) to housing (1). Install the body (32) assembly with socket bolts (6) (3 used). : 8 mm : 61 N m (6.2 kgf m, 45 lbf ft) 33. Tighten plug (36). 34. Install O-rings (79, 81) to plugs (80, 82). 35. Install poppet (75), spring (76), O-rings (77, 78) and (13) (3 used) to housing (1). 36. Install body (40) to housing (1) with socket bolts (6) (4 used). : 8 mm : 61 N m (6.2 kgf m, 45 lbf ft) 37. Tighten plugs (80, 82). W2-5-31