Repairing a Hoist Barrel for a 789 Dump Truck - Step-by-Step Process

🔧The hoist barrel of a 789 dump truck is responsible for lifting and lowering the truck's body and can carry up to 180 tons of material.

🍀The barrel was rebarreled due to deep scores caused by the failure of the chrome layer on a chrome rod.

🔨A square block is welded onto the barrel to facilitate alignment and ensure precise machining.

🔩The head flange is an interference fit onto the new barrel and requires machining and welding.

💥The welding process involves using Cig Verticor flux cored gas-assisted wire and Argoshield heavy gas.

What is the hoist barrel used for in a dump truck?

—The hoist barrel lifts and lowers the body of the dump truck and allows it to carry large amounts of material.

Why was the barrel rebarreled?

—The barrel had deep scores caused by the failure of the chrome layer on a chrome rod.

What is the purpose of the square block welded onto the barrel?

—The square block facilitates alignment and ensures precise machining of the barrel.

How is the head flange attached to the new barrel?

—The head flange is an interference fit and requires machining and welding to ensure a secure connection.

What welding process is used in the video?

—The video demonstrates the use of Cig Verticor flux cored gas-assisted wire and Argoshield heavy gas for welding.

00:13Introduction to a hoist barrel repair job for a 789 dump truck.

01:46Explanation of the upside-down configuration of the hoist cylinders.

08:40Welding a square block onto the barrel for alignment purposes.

24:21Machining the barrel to fit the head flange.

30:26Welding the head flange onto the barrel.