Contractors have always been faced with the challenge of getting the most use out of their equipment and achieving a fast return-on-investment. Emission limits for Tier 4 Final diesel-powered equipment bring even greater challenges. Manufacturers must incorporate additional components to meet the Environmental Protection Agency’s requirements, which means higher costs for manufacturers to produce equipment and higher costs for customers to purchase it. With the subsequent rise in costs, contractors are reevaluating their applications and taking a look at more economical options, such as hydraulically powered tools and equipment.
Hydraulic equipment is widely used in Europe and is growing in popularity in the U.S. due to its high versatility and competitive price point. With the implementation of Tier 4 Final standards, the requirement will eventually phase out Tier 4 Interim diesel engines from the marketplace and nudge U.S. contractors toward higher priced equipment. This economic driver is pushing contractors to escape the tier pressure with alternative equipment that feature attractive ROI and excellent versatility.
Hydraulically driven ROI
Hydraulic equipment can be a versatile and cost effective alternative to pneumatic tools. There is a wide range of hydraulic tools, from cut-off saws to hydraulic hammers that contractors can use to complete a variety of tasks. And hydraulic equipment can be relatively inexpensive to maintain and purchase. For instance, contractors can get an entire hydraulic tool package — a power pack, twin hoses and a handheld tool — for less than $5,000. If contractors have a truck equipped with a built-in hydraulic pump, they might only need an oil-flow divider to regulate the oil pressure, so getting set up with a hydraulic tool can cost less.
There’s more to hydraulic tools than money savings, though; indoor/outdoor capabilities, wide tool selections and high outputs make hydraulic tools a versatile option. Many hydraulic tools, such as breakers, are generally more powerful than pneumatic equipment because hydraulic oil has more resistance than compressed air. For nearly every pneumatic tool, there is a comparable hydraulic counterpart that fits a variety of applications, including construction, demolition, landscaping and road building and repairs.
Low cost of ownership and minimal downtime is another highlight of hydraulic equipment. Hydraulic power packs can require minimal maintenance — regular oil and filter changes and topping off hydraulic oil in the reservoir. This creates short turnaround times for repairs. Some manufacturers also use biodegradable hydraulic oil, which can be safer than other hydraulic oils in the event of a spill and less costly to clean up.
Hydraulic tool maintenance, like the power packs, is quick and simple. But, before the tool leaves for the job site, owners should simply check for oil leaks, tool damage and excessive wear. They also should refer to the manufacturers’ owners’ manuals for maintenance schedules.
The power behind hydraulic tools
A typical hydraulic power pack measures 25 inches tall, 25 inches wide and 30 inches long and easily fits inside a truck box along with other hydraulic tools, such as T-handle hydraulic breakers and cut-off saws. This can make packing a power pack and tools more efficient because more equipment fits in one vehicle instead of loading and securing single- or dual-axle trailers. And for some contractors that have trucks with built-in hydraulic systems, loading and unloading can be easier, since crews might only need to pack the tool and an oil-flow divider.
There are multiple hydraulic power packs that operators can match to their particular tools. For instance, a 9-horsepower power pack generates sufficient hydraulic flows for most hand-held hydraulic tools, including breakers, posthole drivers and saws. Some manufacturers offer power packs with as much as 18 horsepower, which generate the required flow for some of the biggest hand-held equipment, such as 80-pound hydraulic breakers. And operators can increase their productivity by attaching two hydraulic tools to a single unit that features twin engines.
In addition to flexibility, hydraulic power packs operate efficiently and help contractors save on fuel costs. The engines are relatively small so they need minimal fuel to drive the hydraulic oil to the tools, which results in low fuel consumption. To reduce fuel use even further, some power pack manufacturers install specialized fuel systems that conserve fuel until the operator engages the tools’ throttles. This saves fuel that would otherwise be wasted during idle periods and allows the operator to work longer between refueling.
With hydraulic power packs contractors can work on cramped worksites and maneuver around tight corners with a wheeled chassis and handle. Once in position, they simply attach the tool, start the power pack and begin working.
Hydraulic tools also are options for limited noise and vibration worksites, such as hospitals and museums, because their compact, hydraulic engines generate as few as 90 decibels and produce minimal vibrations. With minimal construction noise and vibrations, surgeons, for example, can concentrate on surgeries, and museums don’t have to worry about vibrations damaging irreplaceable artwork.
Tools of the trade
Contractors have a wide range of hydraulic tools to select. Here’s a brief overview of some of the most common hydraulic power tools, including cutoff saws, medium-sized breakers, post drivers and submersible pumps.
For concrete repairs and replacement, a 14-inch hydraulic cut-off saw is the tool of choice. This type of cut-off saw spins as fast as 4,000 rpm and is designed to cut through 5-inch thick concrete, asphalt and steel, making it great for removing precise sections of concrete slabs. For cutting on floors, poured concrete and roads, some manufacturers also offer an attachable cart. The cart allows the operator to push the saw across the concrete without straining their backs.
Contractors use hand-held hydraulic breakers for several indoor and outdoor demolition and renovation jobs. Their high working pressures and impact rates make the breakers ideal for removing brickwork and demolishing asphalt and concrete. Like many hydraulic tools, hydraulic breakers have high power-to-weight ratios. For example, 50-pound hydraulic breakers have roughly the same output as 60-pound pneumatic breakers, which give operators hard-hitting power in lightweight tools. Plus, some manufacturers include vibration-reduction features that minimize operator fatigue and the risk of injuries during prolonged use.
Posthole borers allow contractors to dig holes for a wide range of applications. Posthole borers use augers that range from 3 1/2-inch to more than 13-inch diameters and have powerful torque outputs — as much as 232 foot-pounds — to drill precise holes for road signs; plant trees in public parks; and dig footings for fenceposts and decks. Some borers feature adjustable torque limiters to prevent the posthole borer from spinning if the auger hits a stone. And two-way rotation capabilities make the augers efficient in stony soils by loosening compacted soil and spinning backward to help operators lift the tool out of the hole when finished.
To remove water from areas such as construction sites, contractors turn to hydraulic submersible pumps. These pumps typically draw more than 500 gallons per minute and handle solid debris as large as 2 inches in diameter.
Extending service life
From breakers to saws, there’s a wide range of hydraulic tools that can fit nearly any fleet and project. The reported versatility, easy maintenance and cost effectiveness can help contractors overcome the challenges of Tier 4 pressure for greater longevity, versatility and, most importantly, ROI.