A cracked or worn bucket doesn’t necessarily mean your job site will be shut down for days. The vast majority of common damages can be repaired right on site in just a few hours. Here are the most common types of damage, the repair process, and how to tell if your bucket is worth repairing rather than replacing.
Key Takeaways
- A simple crack repair on a 20-ton excavator bucket takes 2 to 4 hours on site; a complete hardfacing rebuild takes 4 to 8 hours.
- Low-hydrogen E7018/E8018 electrodes are the standard for structural repairs on high-strength steel such as AR400 and AR450.
- As a general industry rule, replacement often becomes the better option when repair costs exceed 50% to 60% of the cost of a new bucket.
- A new bucket generally costs between $1,000 and $10,000 depending on size and brand, making repair considerably more economical in most cases.
The Most Common Types of Damage to Buckets
Cracks are the most common type of damage. They generally appear in areas of high stress concentration: the corners of the cutting edge, the tooth weld areas, and the attachment points where the bucket connects to the arm. An untreated crack will quickly grow under load cycles and can lead to a complete break.
Wear on the teeth and adapters is another common problem. Bucket teeth are wear parts designed to be replaced regularly, but the adapters (the parts that hold the teeth) can also wear out or crack, requiring repair by welding. Deformation of the cutting edge, caused by repeated impacts with rocks or very hard materials, is also common and can affect digging efficiency.
What is the step-by-step process for on-site bucket repairs?
Repairing a bucket on a construction site always begins with a thorough inspection to identify all existing damage. It is important not to limit the inspection to visible damage: the technician also checks the existing welds, the condition of the tooth adapters, and the overall thickness of the bucket walls.
Preparing the areas to be welded is a critical step. Cracks must be ground into a V- or U-shape to create a clean joint that will allow for complete weld penetration. Any contamination (oil, rust, paint) must be removed from the weld area. For high-strength steels (Hardox, AR400), preheating may be necessary to prevent cooling cracks.
Welding Materials and Techniques Used
The choice of welding materials depends on the metal of the bucket. Most modern buckets are made of high-strength steel (AR400, AR450, or equivalent) for their abrasion resistance. These steels require special welding electrodes or wires to maintain the mechanical properties of the repaired part.
For structural repairs (cracks in walls or ribs), low-hydrogen electrodes (E7018, E8018) are generally used to minimize the risk of cold cracking. The low-hydrogen flux in E7018 keeps diffusible hydrogen below 8 ml/100 g of deposited metal, which significantly reduces the risk of cracking in stressed joints (Harris Products Group, 2026). For wear-area repair, chromium-carbide-based hardfacing alloys are applied to restore and improve abrasion resistance.
Repair or Replace: How Long Does It Take, and How Do You Decide?
| Type of procedure | Time Spent on Site | Typical cost |
|---|---|---|
| Single crack (20-metric-ton bucket) | 2 to 4 hours | A fraction of the cost of a new bucket |
| Complete hardfacing / wear-surface rebuild (lip + wear zones) | 4 to 8 hours | Always less than workshop transport |
| New bucket | N/A | $1,000 to $10,000, depending on size and brand |
These turnaround times are considerably shorter than the time it takes to transport the bucket to a repair shop and wait for it to be repaired. The decision to repair or replace depends on several factors. A bucket can be repaired as long as the walls are thick enough and the structural damage does not compromise the integrity of the part. The “50/50” rule (sometimes 60/40) serves as a guideline in the industry: if the repair cost exceeds this proportion of the price of new equipment, replacement often becomes the most economical choice (FieldFix, 2026). An experienced technician can quickly assess whether repair is economically justified.
Which bucket brands are the most common in Quebec?
In Quebec, the most common buckets used on construction and excavation sites are OEM buckets from Caterpillar, Komatsu, Volvo, and Hitachi, as well as replacement buckets from brands such as Hensley, ESCO, and TG Bucket. Locally manufactured or custom-made buckets are also common for specific applications.
Regardless of the brand, the repair principles remain the same. An experienced technician can work on any bucket, provided they have the right welding materials and understand the properties of the base metal. In cases where the bucket’s pivot point is also worn, our article on the 5 signs that a pivot point is too worn details the thresholds to watch for.
Frequently Asked Questions
How long does it take to repair a cracked bucket on a construction site?
Typically 2 to 4 hours for a single crack on a 20-metric-ton bucket, and 4 to 8 hours for a complete re-hardfacing of the cutting edge and wear areas.
What type of electrode should be used to repair an AR400 steel bucket?
Electrodes with low hydrogen content, such as E7018 or E8018, which significantly reduce the risk of cold cracking in high-strength steels (Harris Products Group, 2026).
When should you replace a bucket instead of repairing it?
When the repair cost approaches or exceeds 50 to 60 percent of the price of a new bucket, or when structural damage compromises the integrity of the part (FieldFix, 2026).
How much does a new excavator bucket cost?
Typically between $1,000 and $10,000, depending on the size, brand, and quality of the materials.
Conclusion
Bucket repair on-site is one of the most common tasks in mobile welding. With the right equipment and skills, the vast majority of damage can be repaired quickly and efficiently, without taking your machine out of service any longer than necessary.
Do you need a versatile on-site technician? Contact Solution RML in Sherbrooke: we serve all of Quebec.
