CAT 140M Vs. John Deere 772G Vs. 670G: Which Used Grader Fits Your Job?

Two contractors call us on the same morning. Both need a used motor grader for what sounds like the same project. One maintains county gravel roads, blading light and often, mile after mile. The other cuts road subgrade in wet clay and needs the machine to keep its footing on every pass. They should not buy the same grader.

That is the question behind most Cat 140 vs John Deere 772 and Cat 140 vs John Deere 670 searches. The Caterpillar 140M, John Deere 670G and John Deere 772G overlap, but each makes a different trade-off between weight, power and traction.

Our short answer: a Cat 140M or John Deere 670G covers most maintenance and general site work. The 772G earns its extra cost when heavy cuts and poor traction decide your production. Configuration, condition, and ownership cost matter more than the badge on the hood.

Quick Comparison: Cat 140M vs John Deere 772G vs 670G

The table uses the Tier 3 versions of the Deere machines, because that engine is common in older used units. Cat figures come from the Caterpillar 140M specalog (May 2007). Deere figures come from its 670G/GP and 772G/GP specifications (October 2023).

Operator, full fuel, and a 12-ft moldboard included. Tires differ slightly between sources.

Do not rank these by the blade-pull row alone. Cat calculates its figure at a 0.9 traction coefficient, which it describes as ideal no-slip conditions. Deere’s brochures do not state their assumptions. Later Cat 140M2 and M3 models, Interim and Final Tier 4 Deere machines, and Caterpillar’s current Cat 140 (a 9.3 L, 250 hp, steering-wheel machine) are different specifications.

What Separates These Three Graders?

The John Deere 772G vs Cat 140M comparison is mostly a question of traction and power. The 670G sits close to the Cat on weight but above it on torque. In more detail:

Cat 140M. A lighter, tandem-drive grader with a 7.2 L engine and joystick-only steering. Optional AWD moves it into a different traction class, so an AWD unit and a non-AWD unit are not the same buying decision.

John Deere 670G. Deere’s tandem-drive grader. It weighs within about 900 lb of the 140M at base weight but has a larger 9.0 L engine with more torque and torque rise.

John Deere 772G. The same displacement, rated about 40 hp higher in the Tier 3 tables, with a heavier mainframe (108 in³ section modulus against 88 in³ on the 670G) and six-wheel drive.

Here is the point that catches buyers out. The 670G and 772G are not a like-for-like pair. Deere’s G-Series 6WD brochure lists the 772G alongside the 672G, and Equipment World’s G-Series coverage identifies the 672G, 772G and 872G as the six-wheel-drive models, which leaves the 770G as the tandem-drive counterpart. Comparing the 670G with the 772G changes power, weight, and drivetrain at once. To isolate the value of six-wheel drive, compare the 670G with the 672G, or the 770G with the 772G.

The 772G is not automatically better. It costs more to buy and move, and its extra drive hardware is more to maintain. The 670G is not a lesser machine either. It simply does not carry the heavy-cut capacity many routine jobs never use.

Which Grader Fits Your Job?

County and gravel road maintenance

Washboard repair, shoulder work, and drainage shaping involve shallow cuts and frequent passes. The blade is rarely traction-limited, so extra drive hardware sits idle. A Cat 140M or 670G is usually the better economic fit. The 772G suits soft subgrades, steep grades, or fleets that also do rehabilitation.

Road construction and heavy cutting

This is where drivetrain matters. At maximum weight, Cat’s specalog rates the 140M at 29,670 lb of blade pull, or 45,787 lb with AWD. Deere rates the 670G at 34,173 lb and the 772G at 49,500 lb. The nearest rivals are an AWD 140M and a 772G. A tandem 140M or 670G can handle moderate cuts, but expect more wheel slip in heavy, wet material. Ballast helps: Cat lists a 2,000 lb push plate counterweight, and Deere lists a 2,950 lb front push block and a 1,603 lb rear counterweight. Adding weight over the drive wheels is often cheaper than stepping up a model.

Finish grading and precision work

Precision depends on what is fitted, not on the model name. The 140M is Grade Control Ready, with AccuGrade attachment kits optional. On the Deere side, Grade Pro (GP) units include cross slope, and the brochures list SmartGrade and Topcon- or Trimble-ready options. Deere announced factory-integrated SmartGrade later in the G-Series run, with a field kit for existing machines. Never assume a used unit has any of it.

Site preparation and subdivisions

Pads, access roads and drainage profiles reward versatility and a reasonable purchase price. The Cat 140M and 670G are the balanced choices. The 772G makes sense when the same machine also cuts heavy clay or must work through wet weather.

Snow, aggregates and demanding sites

Cat lists snow plows, wings, and blade float for the 140M. Deere lists snow-pattern radials and a snowplow light bar. Confirm wing and plow compatibility for the exact serial number. We found no head-to-head snow test, so size and power alone prove nothing. Traction, visibility, and blade float matter more than the nameplate. For aggregate yards, a grader maintains haul roads and stockpile surfaces. It is not a substitute for a dozer or loader.

Job-fit matrix

For the Cat 140M, “another configuration” means AWD. For the 670G, it means a 672G or 772G.

Traction, Blade Pull, and Real-World Productivity

Engine power is only the start. Net horsepower is measured at the flywheel. What reaches the ground depends on the gear, the weight over the driven wheels, and how much grip the surface offers. Both OEMs also tune power by gear: the 772G’s Tier 3 table runs from 220 hp in first gear to 270 hp in seventh, so quoting a single “hp” figure flatters one machine or another.

Think of four separate things: engine power, usable power at the wheels, weight over the driven wheels, and the grip the surface allows. Weight and grip cap how much of the engine’s power becomes pull. Past that limit, the wheels spin.

Driven wheels change the traction side. Cat’s specalog shows AWD lifting blade pull from 21,766 lb to 31,370 lb at base weight, about 44 percent. Deere’s 772G rates 49,500 lb against the 670G’s 34,173 lb at maximum weight, about 45 percent more. Those gaps include differences in weight and power, not just drivetrain, and they are calculated ratings, not field measurements. The AWD hardware has a cost: Cat says it raises gross engine power by up to 35 hp to offset the parasitic load, so net power holds constant.

We found no trustworthy independent test that measures completed yards per hour for these three machines. So we cannot say a six-wheel-drive grader always finishes sooner. What we can say is that production on a light blading pass is limited by speed and pass count, while production in heavy material is limited by traction. Soil, moisture, tires, ballast, cut depth, and operator skill can outweigh a 10,000 lb difference on a spec sheet.

Operator Controls, Precision, and Technology

The 140M puts steering, gear selection, and blade functions on two joysticks, with no steering wheel. Deere G-Series machines use a steering wheel on every model, with levers on G units and fingertip or dual-joystick controls on GP units. The Cat vs. Deere grader debate often comes down to this, and Cat’s own claim of reduced hand movement is a manufacturer comparison, not an independent test. Operators who learned on levers may need time on joysticks, and the reverse is also true. That is a practical consideration, not a documented productivity penalty.

Both brands offer shift automation: the 140M has a programmable Autoshift option, and Deere’s Auto-Shift PLUS lets operators work without the inching pedal. Technology varies by build year. The 140M carries Cat Messenger diagnostics and Product Link readiness. Deere units use a diagnostic LCD monitor and JDLink in supported countries. Grade-control kits can be retrofitted to older machines, but we have no verified retrofit pricing. Get quotes for the exact serial number before counting it as a saving.

Used Grader Ownership Costs and Common Buying Risks

Hours alone cannot tell you a machine’s remaining life. A county-owned 2009 140M offered at a platform showed about 17,970 hours with a documented powertrain repair at 13,256 hours. That record is more useful than the hour meter. Duty cycle, idle time, and maintenance quality matter more than the model badge, and we have no comparable evidence that any of the three lasts longer.

Inspect the systems that decide uptime: engine and fuel system, transmission, tandem and final drives, circle and drawbar wear, cutting edges, hydraulic pumps, cylinders and hoses, the articulation joint, front axle and wheel-lean parts, tires, and electronics. Cat’s specalog highlights a modular rear axle and top-adjust drawbar wear strips. Deere lists an optional sealed premium circle and grouped service points. Those features cut service time when intact, but we found no verified failure rankings, repair costs, or component-life figures for any of the three, and we will not invent them.

Weigh these cost components for each machine you consider:

• Purchase price and transport.
• Immediate repairs: tires, cutting edges, circle and drawbar wear, hydraulic leaks.
• Scheduled service and the cost of parts for that serial number.
• Fuel. Both OEMs list a 110 gal tank, but tank size says nothing about burn rate, and we found no comparable published fuel data. Compare cost per unit of finished work, not per hour.
• Grade-control installation, if needed.
• Downtime risk and the nearest dealer or qualified independent shop.
• Resale at the end of your ownership period.

Parts and dealer support. Both Caterpillar and John Deere sell through dealer networks, and coverage varies by region. Confirm your nearest dealer, parts lead times for the serial number, technician familiarity with that model year, and what an independent shop can service. Do not assume either brand has the stronger network where you work.

Emissions. The 140M’s C7 is rated Tier 3 in Cat’s specalog. Deere’s brochures show Final Tier 4 machines carrying a diesel exhaust fluid tank, while the Tier 3 and Tier 2 versions do not. EPA’s emission standards reference guide sets out the tiers, but state and local rules vary, so check your jurisdiction.

Market evidence. Completed prices we found span a wide range: a 2009 Cat 140M VHP sold for $58,000 at a platform (October 30, 2025), and a 2010 140M for $67,100 at Purple Wave (July 31, 2025). A 2018 John Deere 670G sold for $62,000 (July 3, 2025) and a 2016 for $73,000 (January 8, 2026). A 2013 John Deere 772G with 7,213 hours sold for $67,100 and a 2012 772GP with 11,179 hours for $60,500 in mid-2025, while a 2018 772G reached $155,100 that June. These are not matched pairs; hours, fees, attachments, and location differ.

Resale. Year, hours, condition, configuration, records, attachments, and local demand all move value. We found no evidence that either brand holds value better in every region, so ask local auctioneers what they see. A short contract favors a cheaper machine. A long-term fleet position favors a documented, well-supported one.

Comparing Real Used Cat 140M Buying Options

Two machines in our inventory show why you should compare condition evidence, not just model and year.

The 2008 Caterpillar 140M has 9,896 hours, serial number B9D00263, and a Houston, Texas location marked in transit. It is a non-AWD tandem machine with a 14-ft moldboard, Auto Shift, VHP Plus engine rating, front lift mounting, snow wing mounting, air-suspension seat, Product Link, and 14.0R24 tires. VHP Plus puts its net rating in the 183 to 218 hp range from the specalog. Price is call-for-quote.

The 2009 Caterpillar 140M has 13,157 hours, serial number B9D01909, a U.S. location and call-for-price terms. It is about 3,300 hours higher than the 2008 machine, but that gap alone does not decide anything.

Use our guide to questions to ask before buying a used Cat 140M when you compare them. Ask for major repair records, scheduled-service history, an in-person or third-party inspection, and confirmation of which options are installed. Call-for-price machines cannot serve as market data, so benchmark them against the completed sales above.

Which Used Grader Should You Buy?

Choose the Cat 140M when your work is road maintenance, site preparation, or general grading, you want joystick controls, the machine has a verified service record, and your local Cat dealer can support it. Choose an AWD unit if heavy cutting is part of the plan. If you want to see other models, browse our used Caterpillar motor graders.

Choose the John Deere 670G when you need a tandem grader with more torque than the 140M for routine grading, and you will rarely need six-wheel-drive traction. A Grade Pro unit adds cross slope and a path to SmartGrade.

Choose the John Deere 772G when soft ground, heavy windrows, or repeated deep cuts make traction your bottleneck. Our guide to comparing the John Deere 772G with Cat graders covers more of that decision. For a lighter or tandem option, see our used John Deere motor graders, including the 672G and 770G.

The cheapest machine is not the best deal if downtime, tires, or repairs absorb the savings. An expensive, high-capacity grader is a poor deal if it spends its life on light maintenance. Match the machine to the job, verify its condition, and calculate its likely ownership cost before you choose a brand.

Ready to compare? Browse our used Caterpillar and John Deere grader inventory, or ask us to check availability and specifications on a specific machine.

FAQs

1. Is the Cat 140M or John Deere 670G better for routine road maintenance?

A: They are close for routine maintenance. Both are tandem-drive graders suited to shallow, frequent passes, so condition, service history, and local dealer support should decide.

2. Is the John Deere 772G a better choice than the Cat 140M for heavy grading?

A: Usually, yes, when traction limits the work, because the 772G has six-wheel drive and a published blade pull of 49,500 lb at maximum weight. An AWD 140M is the closer Cat comparison, and for moderate cuts a 140M can be sufficient.

3. What is the main difference between the John Deere 670G and 772G?

A: The 772G is higher-powered and heavier, and it has six-wheel drive. The 670G is a tandem-drive machine, so the two differ in more than one way.

4. What should buyers check before purchasing a used Cat 140M or John Deere grader?

A: Confirm the exact year, drive configuration, emissions tier, and installed options, then request service records and an inspection. Also check local dealer parts support, since newer brochure specs may not match older machines.