Strut Cap Repair on a CAT 789D Dump Truck

🔧The top cap of the front strut of a CAT 789D dump truck is an essential component for suspension movement and steering.

🛠️Improper fitment of the strut cap can lead to cracks and excess wear, resulting in failure.

🔩The strut cap can be repaired by machining out the crack and replacing the pin with a precise interference fit.

💡Thoroughly inspecting the previous repair is essential to determine the best course of action for a proper fix.

🔥Welding the repaired strut cap ensures a reliable connection between the pin and the plate.

What causes cracks in the strut cap of a dump truck?

—Cracks in the strut cap can be caused by improper fitment, excessive wear, or previous repairs.

How can I repair a cracked strut cap?

—To repair a cracked strut cap, the crack should be machined out and the pin should be replaced with a precise interference fit.

Can a repaired strut cap last as long as a new one?

—Yes, a properly repaired strut cap can be as reliable and durable as a new one.

What are the common mistakes people make when repairing strut caps?

—Common mistakes include improper fitment, inadequate welding, and neglecting to inspect previous repairs.

What tools and equipment are needed for repairing a strut cap?

—Tools and equipment needed include a lathe, welding machine, dial indicator, bandsaw, and press.

00:23The video introduces Kurtis from Cutting Edge Engineering and the job at hand: repairing a strut cap on a CAT 789D dump truck.

00:52Kurtis highlights the excessive wear and crack in the strut cap that resulted from incorrect fitment.

02:17A dial indicator is used to assess the runout of the pin, indicating whether it was installed correctly or machined after welding.

05:01Kurtis explains the process of machining out the crack and inspecting the previous repair.

12:22The crack is fully machined out, revealing the base of the weld and the need for a proper repair.

23:26Kurtis shows the completed machining and welding, ready for the next steps.

35:39A dial indicator reveals where the strut cap connects to the bearing, indicating potential wear and issues.

38:31The video ends with Kurtis preparing the material for the replacement pin.