Suspension U-Bolt Torque Check

122SD mm 32.03.01
    Notice: Failure to retorque the U-bolt nuts could result in spring breakage and abnormal tire wear.
  1. Park the vehicle on a flat surface, apply the parking brakes, and chock the tires.
    2. Note: Tighten in a diagonal pattern as shown in Fig. .
  2. Check the U-bolt torque in a diagonal pattern. Set a click-type torque wrench to the highest torque value for the fastener being checked. See Table  for U-bolt torque specifications. Turn the wrench in a clockwise motion (looking up) until the torque wrench clicks.

    Table 1, Spring Assembly U-Bolt High Nut Torque Values

    Size

    Torque: lbf·ft (N·m)

    5/8–18

    Stage 1: Hand Tighten

    Stage 2: 60 (81)

    Stage 3: 200 (271)

    Stage 4: 180 to 230 (245 to 313)

    3/4–16

    Stage 1: Hand Tighten

    Stage 2: 60 (81)

    Stage 3: 200 (271)

    Stage 4: 270 to 330 (367 to 449)

    7/8–14

    Stage 1: Hand Tighten

    Stage 2: 60 (81)

    Stage 3: 200 (271)

    Stage 4: 420 to 500 (571 to 680)

    1–14

    Stage 1: Hand tighten

    Stage 2: 60 (81)

    Stage 3: 200 (271)

    Stage 4: 520 to 600 (707 to 816)

      Table 1, Spring Assembly U-Bolt High Nut Torque Values

      Fig. 1, Tightening Pattern for U-Bolt High Nuts

    Note:
    Parent topic: Suspension
    Document Number: 0000125817
    Manual Publication Date: 2025-02-11
    Topic Publication Date: 2025-12-16