Bucket Repair

Rebuilding and Repairing Excavator, Loader and Backhoe Buckets With New Steel and Welding

Copyright 2009 by Mike Dougan and Morris Rosenthal All Rights Reserved

EERS Equipment Service

Excavator buckets can fail due to corrosion or due to heavy usage that literally wears away the steel or breaks the welds. This excavator bucket saw use in a gravel pit, but given that a new rock bucket can cost in the tens of thousands of dollars, repairing an existing rock bucket is always an option. The bottom of the bucket has already been cut out and will have to be replaced with hardened steel, on which the new tooth shanks will be welded. Abrasive resistant steel (AR400) offers much better wear resistance than the mild steel some stock buckets are fabricated from.
To the left you can see a new steel sheet formed over the bottom of the bucket with the tooth shanks and teeth already installed. The bucket is formed by first welding up the oversized sheet, and then trimming the edges, because the the sides of the bucket are tapered rather than square. A hydraulic piston was used to bend the steel sheet to conform to the curve of the bucket's walls after the end of the sheet was welded in place. Mike is welding on a wear plate or grouser bar above the cutting edge, which takes the most abuse on the bucket. The tooth shanks are welded to the cutting edge, and the teeth (technically caps) are mounted on the shanks with a pin. If you can ship it or we can pick it up, contact Mike Dougan at 413-477-0225 for a quote. In the video to the lower left, Mike is welding a grouser bar on a rebuilt Caterpillar 325 excavator bucket.
The only original part left on this Caterpillar 235D excavator bucket to the upper right is the small diamond area on the bucket ears, which attach to the stick, or dipper. The bucket is heavily dressed with wear strips for use in rock. Digging through ledge wears out a bucket in a hurry even if you keep up with the maintenance of the tooth caps and the cutting edge. Most buckets are equipped with removable wear bushings in th ears which are easily replaced. The bushings are hardened steel and the pins are mild, so that the pins take the damage if the bucket is abused. New bushings can be replaced in the field with a through-hole Portapower 50 ton piston. In the video to the right, Mike walks through the rebuild of a Cat excavator bucket with new side walls, grouser bars, wear blocks, and builds up the shanks with weld to extend their lives, as the poor man's option to replacing the whole cutting edge and shanks

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