2005 PETERSON PACIFIC 4700B Horizontal Wood Grinder

New clutch at 9,000 hrs. Engine rebuilt at 7,580 hrs. New bearing on belt at 9,096 hrs.

Reduce price (was $299,900)

2005 Peterson Pacific 4700B

9,662 hours on a 2005 Peterson Pacific 4700B — that’s roughly 460 hours per year on a production horizontal grinder. That level of use is typical for a machine in this class and is supported by key component rebuilds.

Who This Machine Is For

• Land clearing contractors — handles brush, timber, and wood waste on job sites
• Recycling yards — processes material into reusable products
• Forestry operations — built for grinding whole trees and dense material
• Operators looking for value — rebuilt components on a proven platform

What It Grinds

• Brush and green waste — reduces volume for hauling or reuse
• Wood waste — processes pallets and scrap lumber
• Whole trees and timber — handles large material with controlled feed

This is not a chipper. It uses a hammermill system, so the output is ground material, not uniform chips.

Specs in Plain Language

This unit is powered by a CAT C-16 engine. That level of horsepower places it in the high-production class, capable of handling large, dense material without slowing down under load.

With 9,662 hours over 20 years, you’re looking at about 460 hours per year. That reflects steady production use, which is common for grinders in this category.

The engine was rebuilt at 7,580 hours, which is a major value point. This means the engine has significantly fewer hours since rebuild compared to total machine hours.

A new clutch was installed at 9,000 hours, and a new bearing on the belt was replaced at 9,096 hours. These are critical components that directly impact performance and uptime.

The Peterson Pacific 4700B is a horizontal grinder with a controlled feed system, allowing for consistent material sizing and efficient processing.

Buyers should still evaluate wear components such as the mill, teeth, and conveyor system as part of normal inspection, but key rebuilds and replacements help extend the machine’s usable life.

If you’re comparing options, you can also view other horizontal grinders or check tub grinders if your operation prefers gravity-fed loading.

Why Buy From GrinderCrusherScreen

We've been in the horizontal grinder business since 1973. We know these machines because we work in this industry every day. We can answer your questions about the 4700B before you buy, and we help with financing, coordinating inspections, and arranging transportation.

Got a horizontal grinder you need to sell? We handle the marketing, the calls, the tire kickers, and the transaction. It's free. You set your price, you get your price.

Call 770-433-2670 or email sales@grindercrusherscreen.com for pricing or details.