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From memory we had to be at 125% of capacity and then fully articulate the crane. Any crane staying in Western Australia had to be overload tested before it could be certified and registered for use in WA. Yeah baby, technology at its finest!īut the best part was doing the overload testing for all locally ordered machines. When the mainframe bent enough under load, the switch was tripped, which activated an air powered actuator, which was attached to a tee shaped bracket which then knocked the levers out of the operators hands. At the other end of the RHS was a micro-switch fixed to another bracket welded further up the mainframe. A piece of RHS was welded to the mainframe near the turntable. The overload protection was very sophisticated. Can you imagine that now? I also fitted the machines out with electrical accessories such as lighting and overload protection.
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A bloke showed me how to weld and once I got good enough at it, I was set loose. Not sure what that is? Hint you’re sitting on it…įast forward a bit and I’m now fitting out the cranes, including welding on the air power brake components. This is also where I first found out I had a built in biological overload sensor. You only go too fast and cock an inside front wheel just once, before you learn to slow down and treat the machine with respect. Then they were driven back to BHB for painting, then back again to Linmac for final testing and shipping to all points of Australia.Īs an aside, on the cranes first trip from BHB to Linmac, without the counterweight box, and with all that weight on the front of the mainframe, some corners had to be treated with great respect, I can tell you. 40 degree heat or pouring rain, it didn’t matter, there was a schedule to be met and they had to be taken back to our yard and then be fitted out with all the customers chosen features. So regardless of the weather, I would hop on these things and drive them back the approximately 10 kilometres to Linmac’s yard. They were unpainted, unlicensed, and had no cab yet.
#Linmac bhb crane service manual manual
When Linmac took delivery of the cranes, they were simply a Chamberlain agricultural tractor that had the front wheels removed, and then the remains were bolted to the main frame, off the front of which, was hanging the very basic boom with one hydraulic and one manual boom extension. It started by becoming the guy who was taken in the boss’s car to the BHB factory where the basic machine was built.
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So I pushed and wheedled and dropped hints until I was allowed to do some more interesting work with them. I’d always had an affinity for driving and operating things and these cranes were the best big boys toy I’d ever come across. I was fascinated by the way they could pick up 10 tonnes and just waddle off with it and put it somewhere else.
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What happened was, I got more and more interested in the cranes. With my short attention span, I thought I’d give this a go for a while and see what happens. I started by driving the spare parts ute and sweeping the floors, making the tea, picking up the lunch orders. So after a succession of labouring and truck driving stints, none of which lasted more than a few months, I ended up at Linmac Pty Ltd, who were the distributors of the BHB articulated tractor crane. I’d had pretty good marks but just couldn’t stay interested or engaged. I started mucking around with cranes in February of 1977, in Perth in Western Australia at the age of 19 and a bit.