Removing The Tilt Ram And Trim Ram; Disassembling The Tilt Ram - Yamaha F150B Service Manual

Removing the tilt ram and trim ram

Make sure that the PTT rams are fully
extended before removing the tilt cylinder
end screw otherwise fluid can spurt out
from the unit due to internal pressure.
1. Remove the PTT reservoir. See "Remov-
ing the reservoir" (9-41).
2. Remove the PTT motor assembly. See
"Removing the PTT motor" (9-41).
3. Remove the PTT gear pump. See
"Disassembling
assembly" (9-47).
4. Hold the PTT body a.
5. Loosen the tilt cylinder end screw b, and
then remove the tilt ram assembly.
a
Trim and tilt wrench c: 90890-06587
6. Loosen the trim cylinder end screws d,
and then remove
assemblies.
c
Trim and tilt wrench c: 90890-06587
7. Drain the fluid.
the gear pump
c
b
a
the trim ram
d
8. Install the trim ram assemblies, and then
tighten the trim cylinder end screws
temporarily.
9. Cover the tilt cylinder opening with a rag
e, and then blow compressed air through
the hole a to remove the free piston f.
WARNING! Never look into the tilt
cylinder opening while removing the
free piston because the free piston and
PTT fluid could be forcefully expelled
out.
f
10. Loosen the trim cylinder end screws, and
then remove the trim ram assemblies g.
g
g

Disassembling the tilt ram

1. Hold the tilt ram end.
PTT cylinder
0
1
2
e
3
4
5
6
a
7
8
9
10
A
9-52