Line boring & Bore welding CAT 740 Truck A-frame | Sir Meccanica WS2

In this video we are line boring and bore welding to repair a Front A-frame off a Caterpillar 740 Articulated dump truck. The main pivot position on the A-frame is worn out so we are line boring and bore welding to bring the bore back to size to fit a new spherical bearing. We are using our Sir Meccanica WS2 portable in-line boring and bore welding machine. First is setting up and tack welding on the bearing mounts for positioning the line boring machine. We need to line bore out the material before bore welding to build up new material and then boring out to spec. We also chamfer the bore and drill in the grease port. The job is completed by cryo freeze shrink fitting the new bearing using liquid nitrogen.

In this video we are using:
Sir Meccanica WS2 Portable line boring machine
WIA 500i Weldmatic welder

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