💡The head bracket and quick hitch increase the digging power of the excavator but decrease its horsepower and breakout force.
🔧Repairs include line boring the main pivot position, welding cracks, and replacing broken parts.
👌The line boring process requires precise setup and the use of custom-made centering cones.
🔩The head bracket is attached to the tilt bucket using two pins and a quick hitch.
🔥Bore welding and freeze fitting are essential steps in the repair process.
What are the three attachments used by the ZX890 Hitachi Excavator?
—The three attachments are a standard tooth bucket, a ripper, and a tilt bucket.
What does a quick hitch do?
—A quick hitch increases the digging power of the machine by extending the dipper arm.
Why is the main pivot position worn out?
—The wear is caused by the bush not being tight enough to handle the machine's horsepower.
Why did the spacer break off?
—The pin connecting the spacer broke, causing it to work itself loose.
What is the purpose of line boring?
—Line boring is done to repair worn or damaged pivot positions in the head bracket.
00:23Introduction to the job: repairing the head bracket of a tilt bucket for a ZX890 Hitachi Excavator.
04:19Setting up the boring bar for line boring.
10:13Interacting with a bird in the workshop.
24:36Welding cracks and repairing broken parts on the head bracket.
34:37Final thoughts on the completed repair job.
35:00Outtakes and bloopers.
35:09Additional comments on the repair process.
37:01Final attempts to kill a squeaky toy in the workshop.
