Yamaha F50D Servise Manual page 54

TECH
FEA
Tilt-down function
The gear pump 6 pumps the PTT fluid to the down-main valve 5. As a result, fluid pressure opens
the down-main valve 5 and the down-shuttle piston q, which causes fluid to flow into the upper
part of the trim cylinder 3 and forces the tilt piston t down.
:
:
:
1 PTT cylinder
2 PTT ram
3 Trim cylinder
4 Down-relief valve
5 Down-main valve
6 Gear pump
7 Reservoir
8 Up-relief valve
9 Up-shuttle piston
0 Up-main valve
2-15
Technical features and description
2
1
3
4
t
r
w
w
e
6
5
q
0
q Down-shuttle piston
w Ball
e Trim cylinder base
r Free piston
t Tilt piston
a Return
b Send
c Moving direction
7 8
9