Yamaha F400A 2022 - Bleeding the PTT Unit

9-48
PTT unit
Bleeding the PTT unit
1. Bleed:
• PTT unit
a. Place the PTT unit in an upright posi-
tion.
b. Turn the manual valve “1” clockwise to
close it.
c. Check the fluid level.
See step 1 in “Checking the PTT motor
electric current when the relief valve
operates” (9-46).
d. Connect the battery jumper leads to
the PTT motor lead “a” to fully retract
the PTT rams.
TIP:
If the PTT rams do not move down easily, push
on the PTT rams to assist operation.
e. Reverse the connection between bat-
tery jumper leads and the PTT motor
lead “a” to fully extend the PTT rams.
TIP:
If the PTT rams do not move up easily, pull on
the PTT rams to assist operation.
f. Repeat steps (d) and (e) to fully extend
and retract the PTT rams 4 or 5 times.
g. Fully extend the PTT ram.
h. Remove the reservoir cap, and then
check the fluid level in the reservoir.
Before removing the reservoir cap, make
sure that the PTT rams are fully extended.
Otherwise, fluid could be expelled forceful-
ly from the PTT unit due to internal pres-
sure.
Ram PTT motor lead Battery
Retract
Green (G) (+)
Blue (L) (–)
Clamp meter “1”
(commercially available)
Electric current
Down
43-59 A
T
R
.
.
Manual valve “1”
2.0 N·m (0.20 kgf·m, 1.5 lb·ft)
1
Ram PTT motor lead Battery
Retract
Green (G) (+)
Blue (L) (–)
Ram PTT motor lead Battery
Extend
Blue (L) (+)
Green (G) (–)
LG
a
GL
a