Yamaha F50D Servise Manual - page 51
Other manuals for F50D:
Owner's Manual
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PTT unit
PTT unit consists of an up-main valve, a down-main valve, an up-relief valve, a single cylinder, and
a single ram, which control both trim and tilt functions.
PTT cylinder has been integrated with the gear pump housing, the reservoir tank, and the PTT
motor in order to achieve a smaller and more compact unit.
PTT unit components
å
Hydraulic system diagram
1
Cylinder
2
PTT ram
3
Check valve
4
Down-main valve
5
Down-relief valve
6
PTT motor
7
Gear pump
8
Up-main valve
9
Reservoir
0
Manual valve
q
Up-relief valve
w
Up-shuttle piston
e
Down-shuttle piston
r
Trim cylinder base
t
Free piston
y
Tilt piston
2
3
5
4
6
7
8
9
0
q
w
9
e
r
t
y
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q
8
9
å
Lubrication system / PTT unit