MAINTENANCE 4.13 EVERY 2000 OPERATING HOURS OR YEARLY HYDRAULIC SYSTEM - CHANGE OIL, REPLACE SUCTION STRAINERS AND PULSATION DAMPER Legend for illust. Z 21785 (1) Return oil collector manifold (2) Drain coupling (3) Pulsation damper (4) Return oil collector pipe (5) Main control valves (6) Swing control valve NOTICE Attach drain hose (part of tool set) to coupling (2) and drain oil from return oil collector manifold (1). Remove pulsation damper (3) and install new pulsation damper with new O-ring. 441