Disassembly And Assembly (Pt & T); Precautions For Disassembling And Assembling Power Trim And Tilt (Pt&T) System - TOHATSU TLDI 40 Service Manual

4. Disassembly and Assembly
Precautions For Disassembling and Assembling Power Trim and Tilt (PT&T)
System
(1) Make sure to disassemble with the engine tilted up and piston fully extended. Open the manual valve
slightly and leave to set for a while. Make sure that internal pressure has been reduced to zero before
commencing operations.
(2) Remove the oil plug from the reserve tank and drain out all the oil.
(3) Be sure to take all necessary precautions during disassembly as oil tends to spurt and spray about,
getting into clothing, skin and eyes, when parts are being removed.
(4) Be sure to use the specially designed tools when disassembling the PT&T unit.
Tilt rod guide wrench: 3C8-72791-0
(5) Carefully wash and clean all parts prior to assembly to prevent foreign
matter entering the system.
(6) Avoid touching the motor unit when handling the PT&T.
Precautions for Assembly
(1) Oil pump assembly (pump not designed for disassembly):
• Bolt torque: 1.5 to 0.55 kg-m (43.4 to 47.7 Ib-in)
• Apply oil to O-rings.
(2) Relief valve (UP)
• Bolt torque: 1.2 to 1.4 kg-m (8.7 to 10.1 Ib-ft)
• Apply oil to O-rings.
(3) Relief valve (DN)
• Apply oil to O-rings.
(4) Spool valve
• Apply oil to exterior of spool and to backup ring.
• Be careful not to mistake check valve A (for upper chamber) with check valve B (for lower chamber).
• Check valve torque: 0.9 to 1.0 kg-m (6.5 to 7.2 Ib-ft)
(5) Manual valve
• Be sure to follow the proper order when assembling seal washers, seal plate, spring and inner collar.
• Make sure the seal washers are positioned facing in the proper direction. They can be damaged if
positioned sideways.
• Torque: 0.2 to 0.3 kg-m (17 to 26 Ib-in)
• Apply oil to O-rings.
(6) Cylinder assembly and piston rod assembly
• Apply oil to the free piston oil ring, backup ring and exterior of piston.
• Apply oil to the O-rings and backup ring on the piston rod assembly.
• Apply oil to the O-ring on of the rod guide.
• Rod guide torque: 8.0 to 12.0 kg-m (58 to 87 Ib-ft)
(7) Motor
• Screw torque: 0.35 to 0.45 kg-m (30 to 39 Ib-in)
• Bolt torque (Motor assembly): 0.5 to 0.7 kg-m (43 to 61 Ib-in)
(8) Oil plug Torque
• 0.3 to 0.5 kg-m (26 to 43 Ib-in)
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