STRUCTURE, FUNCTION AND MAINTENANCE STANDARD HYDRAULIC EQUIPMENT LAYOUT HYDRAULIC EQUIPMENT LAYOUT VARIABLE GAUGE TYPE (STANDARD) 1. 9-spool work equipment control valve 2. Engine 3. Hydraulic tank 4. Travel motor 5. Hydraulic pump 6. Variable gauge cylinder 7. Center swivel joint 8. Swing motor 10-14 PC09-1 (4)