Bleeding The Ptt Unit - Yamaha F150A Service Manual

2
1
PTT hydraulic gauge adapter "1":
90890-06863
Hydraulic pressure gauge "2":
90890-06776/06800
14. Repeat steps 2–4 to check the fluid level.
15. Connect the battery jumper leads to the
PTT motor lead "1" to fully retract the
PTT rams, and then measure the hydrau-
lic pressure when the reading on the
pressure gauge stabilizes.
Hydraulic pressure (down):
5.85–8.85 MPa
(58.5–88.5 kgf/cm
848.3–1283.3 psi)
Ram PTT motor lead
Green (G)
Retract
Blue (L)
16. Reverse the connection between battery
jumper leads and the PTT motor lead "1"
to fully extend the PTT rams.
1
G
L
2
,
Battery
(+)
(–)
Ram
Extend
17. Remove the special service tools.
Be careful when removing the special ser-
vice tool. Fluid could be expelled force-
fully from the PTT unit due to internal
pressure.
18. Install the main valve "1", and then
tighten it to the specified torque.
TIP:
Install the main valve "1" quickly before any
fluid flows out of the hole.
1
Main valve "1":
11 N·m (1.1 kgf·m, 8.1 ft·lb)
19. Repeat steps 2–4 to check the fluid level.

Bleeding the PTT unit

1. Place the PTT unit in an upright position.
2. Turn the manual valve "1" clockwise to
close it.
9-37
1
L
PTT motor lead
Blue (L)
Green (G)
PTT unit
G
Battery
(+)
(–)