11-40 DF140 “K2” (’02) MODEL
TRIM & TILT UP
(1) When the PTT switch is operated in the “UP” position, the motor and gear pump will rotate in a clockwise
direction.
(2) Pressurized oil will open “Up” check valve A and the oil will flow through “Up” shuttle valve B to the
“Down” shuttle valve E. Following operation of valve E, “Down” check valve D will open mechanically.
(3) Pressurized oil flows through the “Up” check valve A to the bottom of the trim and tilt cylinders, thereby
pushing the trim and tilt pistons upward.
(4) Residual oil in the upper area of the tilt cylinder H is returned to the pump through “Down” check valve D.
(5) Any oil in the area above both trim cylinder pistons will be returned to the reservoir.
(6) Oil will then flow from the reservoir to the pump to stabilize the balance of the oil volumes.
(7) When the engine is fully tilted up, oil pressure will correspondingly increase in the lower chamber of the tilt
and trim cylinders. But, to protect the PTT unit from excessively high pump pressure, the “Up” relief valve
G begins to open.
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