Spring Leaf Replacement (Single Axle)

Spring Leaf Replacement (Single Axle)

Removal Procedure





Important: A leaf spring replacement is only possible on the multileaf spring. The leaf replacement is usually necessary on only the first or second main leaf.


1. If any of the secondary leaves need replacement, replace the complete spring assembly.

Notice: Do not use a machinist's scribe or a screwdriver to match/mark spring leaves. Marking the spring leaves with any sharp tool can cause metal stress and could contribute to early fatigue and malfunction.

2. Remove the spring assembly. Refer to Leaf Spring Replacement (Single Axle) Leaf Spring Replacement (Single Axle)Leaf Spring Replacement (Tandem Axle U-340 Type) Leaf Spring Replacement (Tandem Axle U-340 Type)Leaf Spring Replacement (Tandem Axle RT-400 Type) Leaf Spring Replacement (Tandem Axle RT-400 Type).
3. Mark the spring assembly alignment on one side using a grease pencil or chalk.
4. Secure the spring assembly in a vise or an arbor press.
5. Remove the rebound clip bolts and nuts.
6. Remove the clips.
7. Remove the center bolt and nut. File the peened portion of the center bolt.

Caution: Relieve the spring tension slowly. Spring leaves are under great pressure and could fly apart causing serious injury.

8. Remove the center bolt. Open the vise or arbor press slowly in order to let the spring assembly expand.
9. Clean the spring leaves using a brush if necessary. Do not disturb the alignment marks.
10. Inspect the spring leaves for cracks or signs of fatigue. Replace only the first or second main leaf. Replace the entire spring assembly if additional springs are broken.
11. Inspect the rebound clips for cracks or breaks.
12. Inspect the center bolt hole for distortion or wear.

Installation Procedure




1. Install the spring assembly using the following steps:

1. Apply a thin film of graphite grease to each leaf.
2. Stack the leaves in the correct order.
3. Align the center bolt holes in the spring leafs with a long drift.
4. Align the match marks.
5. Mount the assembled spring assembly in a vise or arbor press.

Notice: Refer to Fastener Notice in Cautions and Notices.

2. Install a new center bolt and nut.

Tighten the spring center bolt nut to 81 Nm (60 lb ft).

3. Cut the new center bolt to the proper length.
4. Peen the end of the center bolt.
5. Remove the spring assembly from the vise or arbor press.

Important: Ensure that the rebound clips are tight enough in order to hold the spring leaves in alignment, but not tight enough to restrict the free movement of the leaves.


6. Install the rebound clips with new bolts and nuts. Align the leaves using a soft faced hammer, if needed.
7. Peen the end of the bolts.
8. Install the spring assembly. Refer to Leaf Spring Replacement (Single Axle) Leaf Spring Replacement (Single Axle)Leaf Spring Replacement (Tandem Axle U-340 Type) Leaf Spring Replacement (Tandem Axle U-340 Type)Leaf Spring Replacement (Tandem Axle RT-400 Type) Leaf Spring Replacement (Tandem Axle RT-400 Type).