Mercury 9M6Z-5560-D Spring - Rear

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Loosen the wheel lug nuts, raise the vehicle and support it securely on jackstands. Block the front wheels to prevent the vehicle from rolling. Remove the wheel. Unclip the brake line from the body and trailing arm mounting brackets. On models with rear disc brakes, remove the caliper and set it aside. Support the trailing arm with a floor jack. On models with rear drum brakes, it may be necessary to disconnect the brake line from the wheel cylinder and move the brake line and bracket out of the way. If equipped, remove the ABS wheel speed sensor and unbolt the harness bracket from the trailing arm. Remove the upper suspension arm. Loosen the lower arm inner bolt. Detach the lower end of the shock absorber from the trailing arm. Mark the position of the spring to the spring insulator. Slowly lower the floor jack, pull the trailing arm down and remove the coil spring. Check the spring for cracks and chips, replacing the springs as a set if any defects are found. Also check the upper insulator for damage and deterioration, replacing it if necessary. Installation is the reverse of removal. Be sure to position the lower end of the coil spring in the depressed area of the trailing arm. Tighten all fasteners to the proper torque specifications.

To test the operation of the strut during inspection, hold it in an upright position and: Move the piston through a full stroke. Move the piston through short strokes of 2 to 4 inches. In both cases, the resistance felt should be smooth and continuous. Jerky or uneven resistance, or visible wear or damage, indicates the need for replacement.

Loosen the wheel lug nuts, raise the vehicle, and support it securely on jackstands. Block the front wheels to prevent the vehicle from rolling.

If a new spring is to be installed, the original spring must be carefully released from the compressor.