TOHATSU BFT75A Service Manual page 137

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TROUBLESHOOTING
POWER TRIM/TILT DOES NOT MOVE
1. power tilt motor inspection
Turn the combination switch ON.
Operate the power trim/tilt switch and check the power tilt motor sound.
Do you hear the motor sound?
YES
NO
2. Manual valve inspection
Check the manual valve tightness.
Is the manual valve tight?
YES
NO
3. Oil leak inspection
Check for oil leakage from the power trim/tilt.
Is there oil leakage?
YES
NO
4. Oil level inspection
Check the oil level with each rod fully extended.
Is the oil level within the specification?
YES
NO
5. Air bleed inspection
Check for air in the system.
Air in the system?
YES
NO
4-24
– GO TO STEP 2.
– Perform "POWER TILT MOTOR DOES NOT OPERATE" troubleshooting (page 4-25).
– GO TO STEP 3.
– Tighten the manual valve to the specified torque: 3.4 N·m (0.35 kgf·m, 2.5 lbf·ft)
– Replace the O-ring and oil seal at the leaking point (when the manual valve O-ring or piston rod
(cylinder cap) oil seal is leaking, replace it as an assembly).
– GO TO STEP 4.
– GO TO STEP 5.
– Fill the oil to the specified level.
– Bleed air from the system (page 18-36)
– Power trim/tilt faulty.
Repair the faulty part by referring to the "POWER TRIM/TILT QUICK
REFERENCE CHART (page 4-27).