Woodward TQ-125 Guide

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Application Note 01300

(Revision NEW, 9/2000)

Original Instructions

TQ-125

Linkage Installation and Adjustment

Woodward reserves the right to update any portion of this publication at any time. Information provided by Woodward is

believed to be correct and reliable. However, no responsibility is assumed by Woodward unless otherwise expressly

undertaken. Copyright © Woodward 2000

All Rights Reserved

TQ-125 Linkage Installation & Adjustment Application Note 01300

2 Woodward

TQ-125

Linkage Installation and Adjustment

General

The linkage kit for the TQ-125 generally consists of the following parts: two rod

ends, a terminal lever, a length of threaded rod, and the associated hardware to

attach these items between the TQ-125 and the prime mover fuel control.

Linkage Compatibility

Match the actuator's direction of rotation with the fuel control's direction of

increased fuel. The TQ-125 has a counterclockwise rotation as viewed from the

shaft end for an increase fuel condition.

The linkage for diesel engine applications should be linear, and matched to the

TQ-125. The TQ-125 has a 60° shaft rotation. Carbureted engines will require a

carburetor compensating (non-linear) linkage. Incorrect linearity matching can

cause stable operation at some fuel settings but oscillation at other fuel settings.

Manually stroke the fuel control linkage from stop to stop as if the actuator were

moving it. The linkage should not bind or have play in it. Lubricate or replace

linkage or fuel control parts as required.

Make sure the actuator is capable of moving the fuel control to maximum and

minimum limits. Let the fuel control limit actuator travel. Set the linkage so the

actuator is just above minimum when the fuel control is at its minimum stop and

so the actuator is just below maximum when the fuel control is at its maximum

stop.

A positive shutdown device, such as a spring, is required to ensure shutdown

upon loss of signal to the TQ-125.

Any unauthorized modifications to or use of this equipment outside

its specified mechanical, electrical, or other operating limits may

cause personal injury and/or property damage, including damage to

the equipment. Any such unauthorized modifications: (i) constitute

"misuse" and/or "negligence" within the meaning of the product

warranty thereby excluding warranty coverage for any resulting

damage, and (ii) invalidate product certifications or listings.

We appreciate your comments about the content of our publications.

Send comments to: icinfo@woodward.com

Please reference publication 01300.

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1000 East Drake Road, Fort Collins CO 80525, USA

Phone +1 (970) 482-5811 Fax +1 (970) 498-3058

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