Installation Manual

Component Installation

Twin Disc, Incorporated

Push-Pull Cable Mounting Bracket and Cable Installation

This section describes how to install the push-pull cable for a mechanically shifted transmission, for a mechanically controlled throttle, and for a mechanically controlled troll valve. See Figures 21 - 25.

Note: Use either a Conductive or Nonconductive Push-Pull

Cable Installation Kit as required by the vessel.

PULL

POSITION

PUSH

POSITION

ADJUSTING CLAMP

CENTERS TRAVEL

TO MATCH CABLE

WITH ACTUATOR

ADJUSTING BALL JOINT POSITION

UP INCREASES CABLE TRAVEL

ADJUSTING BALL JOINT POSITION

DOWN DECREASES CABLE TRAVEL

PUSH-PULL CABLE

CABLE CLAMP

TERMINAL EYE PIN OR

BALL JOINT CONNECTOR

MOUNTING PAD

Figure 21. Servo Actuator Push-Pull Cable Installation

1.

Fabricate a push-pull cable mounting bracket as needed, to attach/clamp the cable to the engine or transmission. The critical dimension is 7.25

inches from centerline of the clamp mounting holes to centerline of the engine/transmission lever. See Figure 22. Secure the bracket to engine/ transmission.

CUSTOMER SUPPLIED

STATIONARY MOUNTING

BRACKET

184.15

(7.25)

52

SERVO ACTUATOR

ENGINE or TRANSMISSION

Figure 22. Push-Pull Cable Mounting Bracket

EC300 Marine Control System Installation Manual #1024168

Twin Disc, Incorporated

Component Installation

CAUTION

Brackets must be located to allow the most direct and unrestricted movement of push-pull cable. Bends, kinks, and tight or multiple radii will cause premature wear and undesirable engine/transmission response.

2.

The Servo Actuator end of the push-pull cable may be adjusted for a range of travel from 1.5-3.5 inch. Loosely attach the cable at the engine/ transmission using a mounting arrangement which allows for a cable travel within the 1.5-3.5 inch range. In rare instances, modifications to the engine/transmission lever are required to meet this range of travel.

(For example: If the travel is less than the 1.5 inch, then the engine/ transmission lever may need to be lengthened, or an additional hole added to the existing lever.) Loosely attach the other end of the pushpull cable to the Servo Actuator. Confirm that the cable travel is within the 1.5-3.5 inch range and tighten the engine/transmission end. Leave the Servo Actuator end loose.

Proceed to the push-pull cable adjustment section for either the mechanically shifted transmission, mechanically controlled throttle, or mechanically controlled troll valve to perform the initial push-pull cable adjustment.

EC300 Marine Control System Installation Manual #1024168

53

Component Installation

Twin Disc, Incorporated

Push-Pull Cable Adjustment for Mechanically Shifted Transmission

The transmission’s gear select actuator is a three-position device: 45 degree left, center, and 45 degree right. See Figure 23. The control will drive the Servo

Actuator to these positions as commanded by ahead, neutral, or astern commands from the control head. The push-pull cable positions the gear select lever in the desired position.

ASTERN

NEUTRAL

AHEAD

ASTERN

NEUTRAL

AHEAD

TRANSMISSION

SERVO ACTUATOR ENGINE

Figure 23. Transmission Gear Select Actuator

1.

Position Control Head lever at the Forward Detent. The Servo Actuator lever will move to the Forward position.

2.

3.

4.

Position the transmission lever to Forward Detent. The attached pushpull cable will move accordingly.

Make note of the push-pull cable position at the Servo Actuator end, comparing the location of the cable to the Servo Actuator lever. Using a piece of tape and pen/marker, mark the Servo Actuator with the position of the cable end.

Repeat with the Control Head lever at the Reverse Detent. The Servo

Actuator will move to the Reverse position.

Note: When you adjust the push-pull cable travel for Forward and Reverse positions, Neutral will automatically be centered. However, you cannot adjust the push-pull cable for Neutral and then assume the Forward and

Reverse positions will be aligned.

Proceed to Push-Pull Cable Final Adjustment.

54 EC300 Marine Control System Installation Manual #1024168