General Information; Use And Maintenance - Twin Disc TECHNODRIVE TMC 40 P Manuel D'utilisation

TECHNODRIVE MARINE REVERSE-GEAR UNIT TYPE TMC 40 P
ISTRUCTIONS FOR INSTALLATION, USE AND MAINTENANCE - SPARE PARTS.
INTRODUCTION
- Prior to starting read and follow the istruction provided in this manual. Failure to do so will make warranty void.
- Technodrive shall not be responsible for any demages caused by faulty installation, wrong handling or deficient
maintenance.
- It is the responsibility of users to provide and install guards and safety devices wich may be required by recognized
safety standards on the respective country.

GENERAL INFORMATION

- The reverse-gear unit type TMC 40 P is built with alloy steel, casehardened, and hardened gears; the clutch-unit
is a bronze double cone and the coupling device is mechanically servo controlled.
- The reverse-gear unit may be coupled only to engines which turn anti-clockwise (as seen from the flywheeI side).
- In forward speed, the output flange rotating direction is reversed with regard to the engine rotating direction.
- The reverse-gear unit can transmit the full power only in forward speed. Reverse ratio is different from forward ratio.
INSTALLATION
- The gearbox is supplied without oil. Therefore, prior to its starting, it must be filled up with ATF oil up to the maximum
level marked by the dipstick.
- The connection between the engine and the reverse-gear unit must be carried out by means of a proper flexible
coupling.
- Before carrying out the connection, protect the splined shaft by putting a layer of water-repellent grease on it.
- Carefully carry out the fitting between the reverse-gear output shaft and the propeller shaft avoiding misalignments.
- The reverse-gear unit may be installed with a maximum inclination of 15° with respect to the horizont surface.
- The reverse-gear unit must be shifted by means of a singie-lever flexible cable. During the installation of the control
cable make sure that the cable neutral position corresponds to that of the reverse-gear unit lever and that the cable
allows the reverse-gear control lever to complete the stroke both in forward and in reverse speed. The stroke of the
lever between forward speed and reverse speed, must not be less than 60 mm (lever lower hole), 70 mm (upper
hole).
- Make sure that the lever forward speed position corresponds to the acual acivancement of the hull.
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Make certain that the control cable is easily movable.
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Make sure that the control cable is able to perform the complete lever stroke both in forward and in reverse
and that it is weli positioned in neutral.

USE AND MAINTENANCE

- Use ATF oil; perform the first replacement after 30 working hours, then replace the oil every 500 working hours but
at least once a year.
- Check the oil level weekly by means of the oil dipstick with the engine off.
- During continuous operations oil temperature must not exceed 90° C.
- The shìfting from one speed to the other must be performed by pausing in the neutral lever position with the engine
running at idle speed. A direct shift from the forward speed to the reverse speed without stopping in the neutral
position is allowed only in case of emergency.
- When the boat is sailing (engine stopped), the gear lever must be in neutral position. Never put the gear lever in the
position corresponding to the direction of travel of the boat.
- The clutch-unit is self-adjusting and, therefore, needs no adjustment.
- lf, after using the reverse-gear unit for a long time, shifting (from forward speed to neutral or from reverse speed to
neutral) becomes particularly difficult, it is advisable first to check the status of the control cable and of its relevant
box. Then, if necessary, unlock the nut ref. 57 (spanner 13) and mantein the screw ref. 28 in its position with an allen
wrench (4 mm.). Than rotate clockwise the screw ref. 28 by a 1/4 of turn and lock the nut ref. 57.
lf one or both clutches slip, it is necessary to check if the control cable runs the whole stroke needed to couple the
reverse-gear unit. (minimum 30 mm on each side in the lower hole and 35 mm on each side in the upper hole of
the control lever). It is also critical that the neutral position of the reverse-gear unit must correspond to the neutral
position of the control cable. lf the problem persists, it is necessary to disassemble the reverse-gear unit in order to
check the status of clutch ref. 22. lf the clutch unit shows signs of wear or burns on its cone-shaped surfaces or on
the groove, it must be replaced. The cone-shaped surface on gears ref. 25 and 24 must also be checked; such surface
must show no marks of burning or seizure and no material deposits coming from the clutch cone otherwise the gears
must be replaced. In the case the clutch-unit alone is replaced, it is not necessary to disassemble adjusting shims
ref. 6 and, therefore, bearings need not to be adjusted during assembly.
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The gearbox is supplied without: oil. Before the first start-up it must be filled up to the maximum level marked
on the dipstick. Use ATF oil.