Yamaha F30A, Service Manual

Page: 228 / 285

BRKT
Bracket unit
7-47
67C3K11
Disassembling the PTT cylinder
1. Hold the cylinder
1
in a vise using alumi-
num plates
a
on both sides.
2. Loosen the tilt cylinder end screw, and
then remove the tilt ram assembly
2
.
WARNING
Make sure that the ram is fully extended
before removing the end screw.
3. Drain the PTT fluid.
4. Remove the free piston 4 from the cylin-
der 1 .
5. Hold the tilt ram 5 in a vise using alumi-
num plates
a
on both sides, and then
remove the tilt piston 6 and tilt cylinder
end screw 7 from the ram.
6. Remove the absorber valves
8
from the
tilt piston
6
.
Checking the tilt cylinder and piston
1. Check the tilt piston
1
, free piston
2
,
and backup ring
3
. Replace if cracked or
scratched.
2. Check the tilt cylinder end screw
4
, dust
seal
5
, and backup ring
6
. Replace if
cracked or scratched.
3. Check the tilt ram
7
. Polish with 400–
600-grit sandpaper if there is light rust, or
replace if bent or excessively corroded.
Cylinder-end screw wrench 3 :
90890-06568
S67C7137
2
3
1
a a
S67C7089
1
4
S67C7090
5
a a
7
6
S67C7091
8
6