Yamaha F150B Service Manual

Also see for F150B: Owner's manual Service manual Owner's manual

2-29TECHFEA Technical features and descriptionPTT unitTrim-up and tilt-up functionWhen the PTT switch is pressed to “UP,” the PTT motor operates the gear pump and fluid pressureis generated. As a result, the fluid pressure pushes the up-shuttle piston, enters the trim cylinderand tilt cylinder lower chambers through the up-main valve, and then pushes the trim ram and tiltram upward.In addition, the fluid pushes the down-shuttle piston, opens the down-main valve, and returns fromthe tilt cylinder upper chamber to the gear pump.After the trim ram has extended completely, the tilt ram operates to tilt up.A ReturnB Senda Reservoirb Trim ramc Tilt ramd Up-shuttle pistone Up-main valvef Trim cylinderg Tilt cylinderh Down-main valvei Down-shuttle pistonj Up-relief valvek Gear pumpl PTT motoraklkihjffbbcgdeAB