Checking The Hydraulic Pressure - Yamaha 55DEHD Service Manual

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Checking the hydraulic pressure

1. Check the hydraulic pressure. Check the
internal parts if out of specification.
2. Fully extend the PTT rams.
3. Loosen the pipe joints 1, and then
remove the pipe joint a.
4. Install the special service tool 2.
NOTE:
9 Put the PTT unit in the drain pan.
9 Tighten the pipe joint of the tilt cylinder tem-
porarily, after remove the pipe joint a.
PTT oil pressure gauge
assembly 2: 90890-06580
5. Connect the PTT motor leads to the bat-
tery terminals to retract the trim rams,
and then measure the hydraulic pres-
sure.
7-37
Bracket unit
1
a
2
68870590
L
68870600
Rams
Down
Hydraulic pressure (down):
6. Reverse the PTT motor leads between
the battery terminals to fully extend the
rams.
Rams
Up
7. Remove the special service tool.
8. Install the pipe joint, and then tighten
them to the specified torque.
Pipe joint:
G
PTT motor lead
Green (G)
Blue (L)
2.2–3.8 MPa (22–38 kgf/cm
PTT motor lead
Blue (L)
Green (G)
15 N·m (1.5 kgf·m, 11.1 ft·lb)
Battery
terminal
+
-
2 )
L G
68870610
Battery
terminal
+
-
6885J11