Service manual

69J1D11
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Trim-up and tilt-up function
When the PTT switch is pressed to “UP,” the power trim and tilt motor operates the gear pump and
fluid pressure is generated. As a result, the fluid pressure pushes the up-shuttle piston upward,
enters the trim cylinder and tilt cylinder lower chambers through the up-main valve, and then pushes
the tilt ram and trim ram upward.
In addition, the fluid pushes the down-shuttle piston downward, opens the down-main valve, and
returns the PTT fluid from the tilt cylinder upper chamber to the gear pump.
The fluid from the trim cylinder upper chamber then returns to the reservoir.
The tilt ram and the trim ram extend simultaneously, and after the trim ram has extended com-
pletely, the tilt ram operates to tilt up.
1
Tilt ram
2
Tilt cylinder
3
Trim ram
4
Trim cylinder
5
Power trim and tilt motor
6
Reservoir
7
Gear pump
8
Up-shuttle piston
9
Up-main valve
0
Down-shuttle piston
A
Down-main valve
È
Return
É
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S69J1420
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