GROUP 3 SWING DEVICE 1. STRUCTURE Swing device consists swing motor, swing reduction gear. 1) SWING MOTOR Swing motor include mechanical parking valve, relief valve, make up valve and time delay valve. Output shaft Oil level gauge Time delay valve Mu Dr GA GB Gear oil filling port (PT1/4) SH PG A B 555K2SM01 SH PG Air vent Dr GA GB A Mu B Hydraulic circuit 2- 11 Port Port name Port size A Main port SAE PF 1/2 B Main port SAE PF 1/2 Dr Drain port PF 3/8 Mu Make up port PF 3/4 PG Brake release stand by port PF 1/4 SH Brake release pilot port PF 1/4 GA,GB Gauge port PF 1/4