Air Bleeding Procedure - TOHATSU 40 Service Manual

SECTION 8
Manufacturer Special Tools Required
Tilt Rod Guide Wrench, 3B7-72791-0, 3C8-72791-0
Trim Rod Guide Wrench, 3B7-72792-0
Power Trim/Tilt Test Stand, 3B7-72794-0
General Equipment Required
Ammeter, 0 - 100A
Analog Multimeter, Electronic Specialties
Digital Multimeter, Electronic Specialties
Test Battery, 12 V, 500 CCAwith 105 minutes [70AH] reserve capacity
Consumable Supplies Required
Power Trim/Tilt Fluid, Nisseki
factory) or any GM approved automatic transmission fluid, see
Engine Specifications in Section 2
Genuine Grease or Equivalent Friction Surface Marine Grease
Cleaning Solvent
Threadlocker, Loctite 242
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AIR BLEEDING PROCEDURE

Air in the PT/T hydraulic system can sometimes be detected by the
presence of muffled sounds during trim/tilt operation. Use the
following procedure to bleed air from the system.
1. Ensure oil reservoir cap is tight.
2. Open the manual valve several turns.
3. Lift engine manually to fully UP position. Engage the tilt stopper
to lock engine in position.
4. Confirm oil level is sufficient. Add oil if needed.
5. Fully close the manual valve and maintain the UP position for a
minimum of 5 minutes.
6. Disengage the tilt stopper. Operate the PT/T motor and lower
engine to fully DOWN position. Maintain this position for a minimum
of 5 minutes.
7. Operate the PT/T motor and raise engine to fully UP position.
Engage the tilt stopper and check oil level. Add oil if needed.
Maintain the UP position for a minimum of 5 minutes.
8. Repeat Steps 6 and 7 for a minimum of five cycles.
Air trapped deep within the manifold may not be
easily bled from the system. If air remains trapped in
the system, repeat the Air Bleeding Procedure over a
period of several days.
8-6
Model M-530 or equivalent
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Model KD 3200 or equivalent
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Power Torque Fluid (as shipped from
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NOTE
3-/ 4-Cylinder