Cat Debuts its Lightest Motor Grader, the Economical 120 GC

Caterpillar has added another GC-designated machine to its equipment lineup, the Cat 120 GC motor grader. The machine is engineered for a range of applications that include government and municipal work, county road maintenance and finish grading.

The GC tag represents a value-oriented design for small to medium-size contractors that don’t necessarily need all the bells and whistles of a high-spec production machine. It’s a simpler machine for a variety of tasks. The owning and operating costs for the new 120 GC can be 20 percent lower than a standard Cat 120 motor grader, thanks to better fuel economy and a lower price, says Eric Kohout, product application specialist.

“The Cat C4.4 twin-turbo engine pairs nicely with the torque-converter drive transmission,” says Kohout. The transmission with torque converter eliminates the need for an inching pedal, so only throttle and brake pedals are required, which simplifies operation. “If you’re on and off of that inching pedal all day and wearing your leg out, this is an alternative where you can control the machine with just the throttle and brake,” says Kohout.

The 171-horsepower engine is matched to the standard rear-wheel drive and optional all-wheel drive, and the eco mode operation increases fuel economy up to 5 percent. The hydraulic cooling fan, with an optional reversing fan for high-debris applications, only runs when necessary to further reduce fuel consumption. The 120 GC is also Cat’s lowest-weight motor grader, some 2,000 pounds lighter than the standard 120, says Kohout.


The steering wheel steering and lever controls are familiar to many and simplify operation.CaterpillarSimplified Operation

A no-spin differential on the 120 GC gives operators simplified operation. “A lot of times operators will forget to activate and deactivate the differential, and this can cause the machine to buck,” says Kohout. “The no-spin differential means if it’s going forward, it is locked up and pulling all the wheels for maximum tractive effort. When you go into a turn, it unlocks automatically. It’s one less thing for the operator to think about.” 

The parking brake automatically engages when the machine is in neutral and the service brake is disengaged. If underfoot conditions require it, there is a simple on-off system for the optional all-wheel drive.

Maintenance and replacement parts play a role in owning and operating costs as well. Cat built the 120 GC motor grader with long-life machine structures for reliable operation, including the standard drawbar circle moldboard that increases durability with hardened circle teeth and replaceable wear inserts that protect the main component structures. This design stays factory tight to enable precision grading long term.

Damage Prevention

The circle drive slip clutch option on the Cat 120 GC protects the drawbar, circle and moldboard from damage if the machine strikes an immovable object. The circle saver option also reduces daily greasing requirements and repairs to the circle and pinion. Additionally, the grader’s new front axle design maximizes bearing life to minimize maintenance. 

A newly designed mid-mount scarifier improves visibility to the attachment while decreasing overall machine length. “The advantage is that it allows the operator more movement of the drum or circle moldboard within the mid-mount scarifier, so you’re not hitting the sides of the scarifier as often,” says Kohout.  “And it installs easily. It just wraps around and bolts to the front of the machine without any welding or brackets needed. It also allows a plate in front of it, so you can attach a push block or a front lift group,” he says.

To improve machine performance, the 120 GC also features a common front bolster for a choice of front lift group, counterweight, or front blade option, which aids in spreading more material faster. The rear of the machine accommodates a ripper or tow-hitch option. Moldboard options include lengths of 10, 12 and 14 feet.

Wheel steering

Cat kept the familiar steering wheel and lever layout for the 120 GC the same as the 120, 140 and 160K models. For operating comfort, the cab offers a choice of mechanical or air suspension seat.

And the control console and steering wheel easily adjust to the operator’s preference. A narrow machine width of 7.9 feet, plus a choice of cabs (standard or low profile), can reduce overall transport height to 10.25 feet to enhance transportability.

Quick Specs

Engine: Cat C4.4Net power, Tier 4 Final/Stage V: 171 hpNet power, Tier 3 equivalent: 171 hpWeight Tier 4 Final/Stage V: 35,494 lbs.Weight Tier 3/Stage IIIA equivalent: 31,424 lbs.Moldboard width: 12 ft.
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Alicia Jimerson Didn’t Want to Run Her Dad’s Construction Firm – So She Started Her Own

For being the fourth-largest city in the country, when it comes to construction, Houston, Texas, often operates like a small town. Everybody knows everybody, and that suits Alicia Jimerson just fine.

Growing up the daughter of a well-known and respected Houston contractor, Jimerson had no intention of going into construction. But as fate would have it, she started helping out in the office of her dad’s company, and after she graduated from college, she decided to try her hand at the business.

Rather than run her dad’s company, Jimerson hung out her own shingle in 1989 to take advantage of minority-owned business provisions. Soon after, she hired two skilled veterans, Tony Bonner as general superintendent and Tom Nugent as project manager. Today, she has 45 employees, runs a $7 million to $10 million business in Stafford, Texas, and is one of Equipment World’s 2021 Contractor of the Year finalists.

But her first venture into the world of bid letting didn’t go exactly as she had hoped. At a meeting with Houston’s biggest general contractor, “I got my ass chewed out,” she says. “He told me my numbers were good, but next time I came in with a bid, I had better bring some men with me, that if I didn’t, somebody was going to take advantage of me on pricing.”

Jimerson didn’t win the bid that day, but undeterred, she kept her head down and worked hard. “It was difficult to get doors to open up. And I don’t think I could have done it without the support of Tom and Tony,” she says.

ssociations are gold

From the start, Jimerson knew something many contractors learn the hard way, if at all. She understood the key to getting business as a small start-up was to build relationships, to meet your peers, shake a lot of hands and pass out business cards.

Thirty years ago, Houston construction may have been a club of good ol’ boys, but that world was changing, due in no small part to the persistence of women like Jimerson. She joined the Houston Contractors Association and was elected to the board in 2008, then chosen as president in 2011. She was also a founding member of the Houston Women Contractors Association.

Just as the relationships developed in construction associations have been important to the success of Jimerson Underground, so has Houston’s Livestock Show and Rodeo. With more than 100 committees and 37,000 volunteers, it is the largest livestock and rodeo show in the world. It unites everyone from the city’s billionaire oil barons to multinational corporations, civic groups and local businesspeople in a common purpose – generating more than $500 million in scholarships for young people since 1932.

Jimerson joined one of the committees in 1989 and has steadily worked her way up to vice president. “You would be surprised at how many contractors are involved in the rodeo,” she says. 

Smooth operations

To keep up with the demand for its services, Jimerson hired Dennis Wolford in 2006 to add some bandwidth on the management side. He’s now the vice president and keeps all the different departments working together smoothly.

In addition to maintaining relationships outside the company, Jimerson Underground has done well by keeping its relationships with its employees strong. “Nurturing the relationships you have with the people who work for you is important,” Wolford says. “It’s not a one-way street. They work for us, but we work for them as well. The people who have been here 20 and 30 years know that.”


David Medrano, project manager, (left) and Dennis Wolford look over estimates.Equipment World“Your employees are not just employees, they’re family,” says Jimerson. “Yes, you’re here to make money, but you’re also here to make sure their families are taken care of. That’s what families do, and the long-term employees know this is home.”

That focus on relationships and the skill and knowledge of 30-year veterans like Nugent and Bonner have impressed Nelson Blackwell of Vaughn Construction, an earthmoving general contractor that does business with Jimerson Underground. “They’re dependable,” says Blackwell. “They’re going to be there for you year-in and year-out. To them, it’s more than just the price on the bid. They’re the people you want on your team.”

Belt-tightening

The recession of 2008-2011 was a stark reminder of just how important this philosophy was to the company. Employees went without bonuses, and executives went without pay for a period, but the company got through it without resorting to layoffs.

One thing it did change during the recession was its philosophy about equipment management. Before the recession the company would run equipment “until the paint fell off,” says Jimerson. But the slowdown in work and the lack of cash flow made it essential to sell most of the assets that weren’t vital to the work at hand. Today, equipment acquisition and disposal decisions are much more strategic, says Wolford.

Jimerson Underground has also been rigorous about sticking to what it does best. On occasion it’ll do a bit of site work for a friend or longtime customer, but the core business is underground utilities – basic water and sewer installations.

“Our guys know water and sewer,” says Wolford. “From the office to the estimator to the permits to the field, everybody knows exactly what to do.”

Proof that this philosophy works comes from customer Falin Ishee at Turner Construction. “From the start it has been a positive impression,” Ishee says. “They are great to work with, from the office staff to the field. Utilities are always a pain to deal with, but they make it easy. They are one of the contractors who stand out.”

jimerson underground contractor texas
Tony Bonner, general superintendent, (left) was the company’s first employee. Dennis Wolford, vice president, (right) joined in 2006 to help it grow.Equipment World

Volunteer to win

Having broken through the glass ceiling in one of the most male-dominated businesses in the country, Jimerson’s advice to those who want to succeed is essentially the same for men or women – build relationships.

It is essential to not just join your local construction and civic organizations, but to volunteer and get on committees in those organizations, Jimerson says.

“That’s how you meet suppliers and other contractors that you may work for someday,” she says. “Even if it’s just a 5-second introduction and handshake, they will at least know who you are. Once you get involved, you’re going to get out of it what you put into it.”