This blog is initiated by damage to a 3 extension crane. Crushing of the control valves and receiver because of a blown stick cylinder holding valve. A costly issue – could this have been avoided with more care? The most time consuming and difficult part of knuckle boom crane operation is undocking the crane. I […]
This is the second of three blogs, Picking up from blog #1 to explain transformers and control voltage. We need lower voltages at the push buttons. These lower voltages are intended to keep the operator safe. Imagine having 575 volts in your hands and getting a shock! It’s bad enough having a 120-volt shock! We […]
When a crane’s hydraulic cylinder is required to hold its position for an extended period, holding valves are how they do it. There are many holding valves on a boom – two per cylinder in fact – one on the piston side and one on the rod side. You can locate them by looking for […]
In this blog I talk about the many types of cranes that are mounted to trucks. These units are used for transporting building materials and lumber. I also want to talk about other types of machines and equipment you can find on construction sites, especially here in the Toronto General Area (GTA). Drywall booms are […]
