Mercury F4AZ-5310-H Spring - Front

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Slowly lower the jack until the coil spring is fully extended. Remove the safety chain, coil spring, and insulators from between the suspension arm and the spring upper seat.

Loosen the wheel lug nuts. Raise the vehicle and securely support it on jackstands. Remove the wheels. On 1988 through 1991 models, disconnect the stabilizer bar from the link. Remove the shock absorber. Disconnect the center link from the Pitman arm. Use a suitable spring compressor, following the manufacturer's instructions, to relieve tension on the spring. Compress the spring. Remove the nuts and bolts securing the inner end of the lower control arm to the frame. Slowly lower the control arm. Remove the spring and compressor as a unit. Note the installation of the upper insulator between the upper end of the spring and the frame. If the spring is to be replaced, slowly loosen the spring compressor tool until all tension is removed, then remove the tool.

Use a jack placed under the axle housing to support the rear axle assembly. Additionally, position a safety chain through one of the spring coils and around a convenient frame member to prevent the spring from flying out before it's fully extended.

The removal process includes disconnecting stabilizer bar link, using a spring compressor to remove the coil spring, and removing lower control arm from the frame.

Start by loosening the wheel lug nuts, raising the rear of the vehicle, and supporting it securely on jackstands under the frame. Remove the rear wheels and block the front wheels. Next, remove the rear stabilizer bar and support the rear axle assembly with a jack placed under the axle housing. Use a safety chain through the spring and around a frame member for added security. Disconnect the lower studs of the two rear shock absorbers from their mounting brackets on the axle tube, and detach the height sensor connector link from the upper control arm. On 1998 and later models, disconnect the lateral arms that are part of the Watts linkage at the chassis ends. Slowly lower the jack until the spring is fully extended, and then remove the safety chain, coil spring, and insulators from between the suspension arm and the spring upper seat.

Place the spring upper insulator on the spring and secure it with tape. Install the spring compressor according to the manufacturer's instructions and compress the spring. Position the spring on the lower control arm, ensuring the lower end properly engages with the seat. On 1988 through 1991 models, align the end of the spring to cover the first hole in the lower control arm spring seat, leaving the second hole uncovered. Carefully raise the lower control arm, guiding the inner end to align with the bolt holes in the frame. Install the pivot bolts into the control arm and the frame. Loosely attach the nuts on the bolts. Attach the center link to the Pitman arm. Attach the lower end of the shock absorber to the lower control arm. On 1988 through 1991 models, attach the stabilizer bar to the link. Install the shock absorber. Install the wheels. Remove the jackstands, lower the floor jack, and lower the vehicle. Tighten the wheel lug nuts to the specified torque. After lowering the vehicle, tighten the lower control arm pivot bolt nuts to the specified torque. This can also be done with the vehicle on jackstands by raising the lower control arm with a floor jack to simulate normal ride height.