171 HYDRAULIC SCHEMATIC JT8020M1 TIER3 HOIST CONTROL VALVE FROM AUXILIARY 2 1 3 DRIVER AUGER A B EXTENSION OPTION OUTER BOOM SWITCH PRESSURE PSI 1500 2100 PSI INNER BOOM PSI 1500 DRIVE SWING A BRAKE SWING DRIVE PSI 2000 B A B PSI 2000 03 ID0039824 (CHARGE) FROM ROTATION PUMP 2200 PSI B A B A B A B A