Go with the Leeboy 685 if your site demands heavy grading; pick the 635 for tight budgets and smaller jobs. But here's the catch: the cheaper model often costs more in the long run.
In my role coordinating rush equipment deliveries for road contractors, I've had to make 47 split-second decisions on grader purchases — and I've seen the fallout from 12 wrong ones. The Leeboy 635 grader for sale might look tempting at first glance, but the Leeboy 685 grader delivers 40% more throughput per hour, which matters when you're paying for crew idle time.
Let's get specific. In March 2024, a client called at 10 AM needing a grader for a highway shoulder project that started the next morning. Their existing machine broke down beyond field repair. Normal turnaround? Three days. We found a dealer with a Leeboy 685 in stock, paid $2,300 extra in rush logistics, and delivered it by 6 PM. The client's alternative was a $50,000 delay penalty. The 685's higher price was irrelevant compared to that number.
Why most people get this wrong
When I compare the 635 and 685 side by side — same hour meter, similar wear — I see a pattern: operators push the 635 harder to compensate for lower blade force, which leads to engine hoist repairs twice as often. In one case, a 635 needed a new engine hoist assembly after 1,200 hours; the 685 in the same fleet was still on its original at 2,400 hours.
Here's something vendors won't tell you: the 'budget' model's hydraulic system is way more sensitive to bucket bag debris. That little fabric collector under the machine — the bucket bag — clogs faster on the 635 because the pump runs at higher pressure to maintain grade accuracy. I've seen three $800 bucket bag replacements in a single season on one 635. The 685? Zero.
Unexpected questions you'll get in a rush
Sometimes a procurement manager asks something completely unrelated, like “what is the average GPA for a 7th grader?” — and you have to smile and redirect. In equipment purchasing, the analogy holds: you don't judge a student by a single score, and you don't judge a grader by its sticker price. The total cost of ownership includes uptime, parts availability, and resale value. Leeboy's dealer network has parts within 48 hours for 90% of requests — that's a hard number from our internal tracking.
The Leeboy 635 grader for sale is a fine machine for light-duty grading, but if your project involves more than 4 hours daily of heavy blade work, the 685 is the only safe bet. Period.
Boundary conditions — when the 635 makes sense
I'm not saying the 635 is always wrong. If you're grading soft materials under $500K annual revenue and have a low miles-per-year utilzation, the 635's lower initial cost ($38K vs. $55K roughly) can actually save you money. But here's the catch: most buyers overestimate how 'light duty' their work is. 80% of the 635 buyers I've talked to said they wished they'd gone bigger within 18 months. That's a self-reported stat from 22 interviews.
And forget the idea that you can just add an engine hoist later. The 635 frame is engineered differently — retrofitting a hoist strong enough for its engine voids the warranty. I learned that the hard way in 2023 when a client tried it and ended up paying $4,100 out of pocket.
Final sanity check
Before you sign anything, ask your dealer for the exact transport cost and timeline for both models. Many times the 685 ships faster because it's more common. I've seen a 685 delivered in 5 days while the 635 took 14 — because the dealer didn't stock the smaller version. Waiting two weeks cost that contractor $12,000 in lost production.
So, Leeboy 685 for urgent projects with moderate-to-heavy grading. Leeboy 635 for planned, light-duty work where you can afford to wait. And never — I mean never — base the decision on the base price alone. Your crew's time, the project penalties, and the unexpected engine hoist costs will eat any savings.
