Triumph TR6 PI Operation Manual page 254

OPERATING VALVE
- Remove and refit
40.16.01
OVERDRIVE 'A' TYPE
Removing
1. Switch ignition ON, engage top gear, operate
overdrive switch six times, switch off. This operation
dissipates pressure in overdrive unit.
2. Lift front console tray, remove rubber grommet.
3. Use extension and socket to remove operating valve
plug.
4. Use magnet to withdraw spring, plunger, ball and
valve.
5. Insert ball into hole and onto its seat. Fit valve upside
down so that the seat in the casing is facing the seat
on the valve with the ball interposed.
6. Give the valve a sharp, gentle tap, remove the valve
and ball.
7. Check the valve bore and outlet hole to ensure it is
not choked.
Refitting
8. Reverse 1 to 4.
NON-RETURN VALVE
- Remove, re-seat and refit
Operation 40.18.01, 1 to 9 and 21 to 33.
Triumph TR6 Manual, Part No. 545277 Issue I
40.16.10
40.16.0IA
40.16.lOA