Hi-Ranger bucket trucks have a very good reputation in the industry. The history of Hi-Ranger, the Cadillac of bucket trucks” shows that they have been innovators right from the start. Did you know the Hi-Ranger bucket truck joystick (or pistol grip) was invented a couple decades before kids even began moving Mario and Luigi from room to room with their Play Station joysticks?
Lester Myers, working at the Mobile Aerial Towers plant in Ft. Wayne, IN in the mid 1950’s, invented and patented the upper control pistol grip assembly for the early Series 4 and 5 Hi-Ranger bucket trucks. It allowed the user to perform more than one function from the same grip – up/down/rotate.
Those of us that work on, supply parts for, or go up in Hi-Ranger bucket trucks can appreciate how much the pistol grip has done for the tree trimmer and utility industries. The picture below shows how far the pistol grip mechanism advanced over the years – this one is from the early 1990’s.
Check out the Hi-Ranger brochure, “The Story of High Performance,” from 1964
Another unique and popular feature on the early Hi-Rangers was “compensated boom movement” where the movement of the joystick corresponded directly to the movement of the booms. These early machines employed a compensating chain and sprocket assembly that connected the turntable (i.e. base of unit) to the upper boom via the lift cable, which added flexibility for maneuvering the bucket. The compensating chain mechanism has since been replaced by a special compensating hydraulic cylinder, making the independent movement of the lower and upper booms even easier.
Compensated boom movement allowed the upper boom to remain horizontal while the lower boom was being raised, allowing flexibility in lining up the bucket for use. This coupled with the single handle joy stick made it easier for the operator to move where he intended to go. Talk about versatility and maneuverability!
The early bucket trucks had a steel upper boom that was wrapped in fiberglass for contact insulation. In the early 1960’s, recognizing the need to improve electrical safety, Hi-Ranger manufactured bucket trucks with all fiberglass upper booms. This was a big innovation, but the steel lower boom was still not adequately insulated, making ground personnel vulnerable if the lower boom came in contact with a live wire.
The all steel lower boom was installed on early Hi-Ranger units like the 4D, 4F, 5TD, 5F, and 6TD. The 5TD unit was also offered with an insulated fiberglass turntable ring that provided chassis insulation in the event the elbow steel came in contact with an energized power line.
Then in the early 70’s, Hi-Ranger began manufacturing units like the 4FI, 5FI, and the 6TDI with a lower boom that incorporated a fiberglass insert between two steel sections. This innovation was incrementally perfected over the next 15 years, making ground personnel safer from electrocution.
In 1983, the Hi-Ranger line was sold and moved its operations to Waukesha, WI. Shortly thereafter they introduced the 5H unit, followed a few years later by the 5HA series. In the mid ‘80’s Hi-Ranger came up with the power-assist feature for upper and lower controls. Prior to the controls operating with power assist, it was sometimes a feat of strength to operate the controls in cold weather.
Prior to the mid 1980’s Hi-Ranger units incorporated an accumulator – a fluid storage reservoir that housed hydraulic fluid and kept it under pressure, ready for use. In the mid ‘80’s the accumulator system was replaced by a variable volume piston pump which allowed for efficiency as well as simplicity. As you might expect, hydraulic pumps have also been improved and enhanced over the years.
The Hi-Ranger line was purchased by Terex Utilities in 1992, and continued to be a leader and innovator. That was around the time when the XT series over-center aerial device was introduced. The term “over-center” refers to the position of the upper boom when it is fully extended and actually breaks past the 90-degree mark … it goes over center. This function gives an operator the ability to extend the lower and upper boom out vertically, thus having almost twice the amount of side reach capacity.
In the early 2000’s Terex introduced the hydraulic lift unit, or elevated unit. This innovation raised the whole boom mechanism, allowing aerial devices to add about 15 feet of working height without adding additional boom length. The hydraulic lift mechanism has the look of a large scissors jack.
So much for the history of Hi Rangers … now for the shameless UEP plugs. We can meet all your Hi-Ranger bucket truck parts needs, including for older units – all the way back to the 1960’s. In addition, we offer a rebuild service for Hi-Ranger pistol grip controls, and for that matter, we also offer the rebuild service for most other makes of bucket trucks.
But if you’ve got a leaky control and all you need is a seal kit, we can help there too. We will actually answer the phone when you call. UEP has a motto that we stand by – Prompt, Responsive Service … Guaranteed Every Day! Contact Utility Equipment Parts today for your Hi-Ranger or any bucket truck need.
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