PATH:Suspension Front Suspension Lower Control Arms Removal & Installation

PATH:Suspension Front Suspension Lower Control Arms Removal & Installation

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PATH:SuspensionFront SuspensionLower Control ArmsRemoval & Installation

Removal & Installation

  1. Raise and safely support the vehicle, allowing the front suspension to hang free.
  2. Remove the wheel and tire assembly.

WARNING
Be careful when working in the area of the CV-joint boot. Damage to the boot could result in eventual CV-joint failure. If necessary, install CV-joint boot protector tool J-34754 or equivalent, to protect the boot.
  1. Remove the stabilizer bar-to-control arm bolt.
  2. Remove the cotter pin and nut from the ball joint stud. Use ball joint separator tool J-36226 or equivalents, to separate the ball joint from the steering knuckle.

WARNING
When working near the halfshafts, be careful not to overextend the inner CV-joints. If the joint is overextended, the internal components may separate resulting in joint failure.
  1. Remove the control arm mounting bolts and remove the control arm from the frame.

To install:

  1. Position the control arm to the frame and install the mounting bolts, washers and nuts. Do not tighten the mounting nuts at this time.
  2. Connect the stabilizer bar to the lower control arm and tighten the link nut to 13 ft. lbs. (17 Nm).
  3. Connect the ball joint to the steering knuckle and install the castellated nut. Tighten the ball joint nut to 88 inch lbs. (10 Nm). Then tighten the nut an additional 120°, during which a torque of 41 ft. lbs. (55 Nm) must be obtained.
  4. Install a new cotter pin in the ball joint stud. If the cotter pin cannot be installed because the hole in the stud does not align with a nut castellation, tighten the nut up to an additional 60° to allow for installation. NEVER loosen the nut to provide for cotter pin installation.
  5. If necessary, remove the CV-joint boot protector tools.
  6. Install the wheel and tire assembly and lower the vehicle.

Lower control arm installation—Deville and Fleetwood
  1. When the weight of the vehicle is supported by the lower control arms, tighten the front mounting nut to 140 ft. lbs. (190 Nm), then the rear mounting nut to 91 ft. lbs. (123 Nm).
  2. Check the front wheel alignment.

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PATH:SuspensionFront SuspensionLower Control ArmsBushing ReplacementControl Arm Mounted Bushing

Control Arm Mounted Bushing
  1. Remove the control arm from the vehicle.
  2. Remove the bushing from the control arm by tapping down the flare with a hammer and punch.

To install:

  1. Insert bolt, washer, and bearing assembly J-21474-19 or equivalent, through bushing driver J-21474-13 or equivalent, and position the small end facing the bushing.
  2. Position flaring tool J-23915 or equivalent, with the small flare facing the bushing.
  3. Install the nut J-21474-18 and tighten until a 45° flare is obtained and the bushing is secure in the control arm.
  4. Install the control arm on the vehicle.

Removing the control arm mounted bushing
Installing the control arm mounted bushing

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PATH:SuspensionFront SuspensionLower Control ArmsBushing ReplacementFrame-Mounted Bushing

Frame-Mounted Bushing
  1. Remove the control arm from the vehicle.
  2. Insert bolt, washer, and bearing assembly J-21474-19 or equivalent, through bushing driver J-21474-13 or equivalent, and position the small end facing the bushing.
  3. Place bushing receiver J-21474-5 or equivalent, on the front of the bushing.
  4. Tighten the bolt until the bushing is driven out of the frame, then remove the bushing driver tool.

To install:

  1. Insert bolt, washer, and bearing assembly J-21474-19 or equivalent, through bushing receiver J-21474-5 or equivalent, with the large end facing the bushing.
  2. Position the large end of bushing driver J-21474-13 or equivalent, facing the bushing.
  3. Thread on nut J-21474-18 or equivalent.
  4. Tighten bolt J-21474-19 or equivalent, until the bushing is fully seated.
  5. Remove the bushing driver tool and reinstall the control arm.

Removing the frame-mounted bushing
Installing the frame-mounted bushing

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