GROUP 4 TRAVEL DEVICE GROUP 4 TRAVEL DEVICE 1. CONSTRUCTION 1. CONSTRUCTION Travel motor consists motor unit, regulator and counter balance valve. Motor unit Regulator U T1 M1 M1 MB(MA) A B Y S T2 G X Counter balance valve G X MA MB VIEW Y Port Port name Port size M1 B(FOR) A(REV) S Hydraulic circuit 2-21 T T G MB X MA Gext A, B G M1 X T2 U S MA,MB Main port S AE 6000psi 1 Gauge port M14×1.5 Gauge port M14×1.5 Pilot pressure port M14×1.5 Drain port M18×1.5 Flushing port M18×1.5 Make up port M22×1.5 Gauge port M18×1.5