Doosan DX62 Tipping Link Repair – Twisted H-Link Rebuilt Square

A twisted excavator tipping link (H-link) can be cut apart, rebuilt with new sections and welded back together square, usually for far less than a new link. Simply Welding repaired a twisted tipping link from a Doosan DX62 excavator. The link came into our workshop after its pin worked loose and twisted the link. We rebuilt it and had it back with the customer the same day.

Job Description

We repaired a twisted tipping link (H-link) from a Doosan DX62 excavator by cutting out the damaged sections, making new ones and welding the link back together square.

Cause of the Damage

The pin retainer had come adrift, letting the pin work its way partly out. With the pin no longer fully supported, the tipping link was twisted out of shape.

Cutting Apart

The link was cut into its individual components. The twisted sections were discarded and new sections were made to replace them.

Weld Preparation

The boss was set up in the lathe, where the excess weld was removed and the joint faces were cleaned up ready for welding.

Set-Up and Welding

Everything was set up on our fabrication table, measured and lined up square. The link was then welded in sequence to stop it pulling out of alignment, and allowed to cool slowly.

Finishing

Once cool, the tipping link was painted to match the machine.

Result

The repaired tipping link was completed and delivered back to the customer the same day. They fitted it the following day and it fitted perfectly.

Frequently Asked Questions

What causes an excavator tipping link to twist?

On this Doosan DX62, the pin retainer had come adrift and the pin worked its way partly out. With the pin no longer fully supported, the load twisted the tipping link out of shape. Checking pin retainers regularly helps prevent this kind of damage.

Can a twisted tipping link be repaired?

Yes. The link is cut into its individual components, the twisted sections are replaced with new ones, and everything is set up square on a fabrication table and welded in sequence so it does not pull out of alignment.

How long does a tipping link repair take?

This Doosan DX62 tipping link was repaired and delivered back to the customer the same day, and it fitted perfectly when they refitted it the following day.

What is a tipping link (H-link)?

The tipping link, often called the H-link, connects the bucket ram to the bucket, giving the bucket its tipping action. Because it carries the full force of the bucket ram, a loose pin can quickly twist it out of shape.

Why is the link welded in sequence?

Welding heats and shrinks the steel. Welding in a set sequence balances that heat across the link, so it does not pull out of alignment and stays square once it has cooled.

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Bent or twisted tipping link on your digger? Call 07747 682451 or send us some photos via WhatsApp.