Air Bleeding - TOHATSU BFT250A Service Manual

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AIR BLEEDING

• Bleed air from the unit whenever the power trim/tilt is
assembled.
• Perform the following procedure to bleed air:
1. Bleed air without mounting the unit on the outboard
motor.
2. Check hydraulic pressure (page 19-33).
3. Bleed air after mounting the unit on the outboard
motor (page 19-32).
Power trim/tilt not mounted on the outboard motor
1. Hold the power trim/tilt vertically.
2. Operate the power tilt motor to compress each rod
fully (Connect the battery [1] negative (–) cable to
the green terminal of the power tilt motor 2P
connector [2], and the battery positive (+) cable to
the blue terminal.)
3. Operate the power tilt motor to extend each rod fully
(Connect the battery positive (+) cable to the green
terminal of the power tilt motor 2P connector, and
the battery negative (–) cable to the blue terminal.)
• Connect the battery cables to the power tilt motor 2P
connector terminals with care not to short-circuit the
connector.
4. Remove the oil tank cap with each rod extended
fully. Check whether the Automatic Transmission
Fluid (ATF) is at the upper limit [1] of the filler port.
If ATF does not flow out of the filler port, add ATF
until it flows out.
Check the fluid level with the rods fully extended.
Note that ATF will spurt out when the oil tank cap is
removed with the rods fully compressed.
5. After adding ATF, repeat the procedure from step 2
through 4 two or three times to bleed air from the
unit.
6. Be sure that the rods fully extend and compress
during the step 5 operation.
When the rods fully extend and compress fully,
perform the hydraulic pressure check (page 19-33).
If the rods do not compress fully, perform the
following procedure.
To compress the piston rod:
To extend the piston rod:
[1]
TRIM/TILT
[2]
[1]
[1]
[2]
19-31