UPPERSTRUCTURE / Swing Device Disassemble Swing Motor CAUTION: Swing motor weight: 50 kg (110 lb) IMPORTANT: Do not disassemble relief valve (32). 1. Remove relief valves (32) (2 used) from valve casing (28). 19 Notch A 1 : 41 mm 2. Remove plugs (24) (2 used) from valve casing (28). : 14 mm 3. Remove springs (26) (2 used) and poppets (27) (2 used) from valve casing (28). IMPORTANT: Record the clearance dimension between valve casing (28) and casing (1). 4. Put the matching marks at the jointed surfaces between valve casing (28) and casing (1). Remove socket bolts (29) (4 used). T178-03-02-003 : 17 mm 5. Remove valve casing (28) from casing (1). NOTE:
Valve plate (21) may be removed with valve casing (28) together. Do not drop valve plate (21). 6. Remove valve plate (21) and springs (20) (24 used) from rotor (9). 7. Install special tool (ST 1468) to notch A and remove brake piston (19) from casing (1). 8. Remove O-rings (17, 18) from casing (1). W2-6-25 28