The WoodMaxx MX-9900 hydrostatic auto-feed chipper is a robust self-feeding PTO wood chipper. This wood chipper is extremely compact, and built to withstand commercial use. The POW-R-TORQ™ infeed system pulls material into the chipper head using a powerful, high quality, USA Made hydraulic motor. This motor is powered by the chippers self-contained hydrostatic pump and reservoir. Four (4) High quality (A8 tool steel) made in the USA knives are standard equipment on our MX-9900SS, MX-9900, and MX-8600 wood chippers. The design of the WoodMaxx MX-series chipper is so unique and innovative that it is now USA and internationally patented.
WoodMaxx patented MX-series wood chippers are proudly designed, engineered and manufactured in the USA at our Akron NY facility. With a multi-million-dollar investment in the latest high-tech fabricating equipment to increase production, WoodMaxx MX-series American Made wood chippers are in high demand.
View our FREE online manual here.
POW-R-TORQ™️️ is a trademarked and patented infeed system. This system is a combination of our patented hydro-static pump-motor, specially designed infeed roller, nitrogen filled gas springs, automatic belt tension device and American made A8 tool steel knives. Combined, these features create the most powerful, efficient, and speed variable infeed system available on ANY woodchipper on the market today.
Hydrostatic drive systems have several differences and benefits over traditional hydraulic drive systems. Hydrostatic pumps exhibit variable displacement without the need for external devices such as flow control and flow diverter (proportioning) valves. This reduces the number of fittings, hoses, and amount of oil needed. Unlike hydraulic systems requiring several gallons of oil, our hydrostatic system only needs 2 quarts of motor oil (Why can’t I use synthetic oil in my chipper? Click here to find out.) Hydrostatic technology has been around for decades and is used in some of the highest demanding and harshest mobile applications such bulldozers, trains, excavators, skid steers, and even ride on lawn mowers. Hydrostatic systems are very efficient, generate minimal heat, and are extremely precise, allowing for smooth infeed speed control from 1 ft./min to a full 75 ft./min. with full power through the entire speed range. Take a look below for more information on each of these key POW-R-TORQ™️️ features or watch a short video here.
WoodMaxx MX-series wood chippers are equipped with USA-made hydraulic infeed motors. This high quality 200cc orbital motor offers high load bearing capacity, giving it the ability to withstand thousands of hours of rotational resistance, that comes with drawing large, dense material into the infeed bin. It also offers extremely high torque for maximum pulling efficiency.
WoodMaxx MX-9900 wood chippers are equipped with a 26.5″ dynamically balanced flywheel. This flywheel paired with specific engineering components, delivers 225 lbs. of energy to quickly and easily chip a variety of branches. We use a heavy gauge 1/4″ thick (American Standard A-36) structural steel plate to house the flywheel. This features a clam shell design, in which the entire top half of the housing hinges open, allowing for easy access to the flywheel and knives, so knives can be easily changed in as little as 10 minutes.
To allow the flywheel to run extremely true while adding a great deal of strength, the 2″ main shaft on the MX-9900 PTO wood chipper passes through the flywheel housing and is supported by two industrial flange bearings. Competing machines use a 1-3/4″ shaft in conjunction with two pillow block bearings, and the flywheel is cantilevered beyond these bearings. With this setup, there is a possibility of breaking a bearing housing if the machine jams.
WoodMaxx MX-series American Made wood chippers incorporate a series of precisely located ventilation holes in the flywheel chamber. This feature creates a strong vacuum that draws air into the flywheel chamber and in combination with the fan blades on the back of the flywheel forcefully ejects the wood chip s out of the chamber. This keeps the discharge chute clear and reduces the chances of a jam. The WoodMaxx patent pending hole pattern is specifically designed to bring the air into the chamber at the optimal volume and location.
This patented, 8.25″ diameter, octagonal shaped, commercial style infeed roller is an innovative design, made in the USA. Specially designed with chisel shaped, spaced teeth, it pulls material into the flywheel at speeds up to 75 ft. /min with ease. The spacing allows the complete down pressure of the high-tension gas springs to be focused on one chisel tooth at a time. This increases total down pressure and allows the roller to self-clean. These rollers, along with the high-tension gas springs aggressively bite into all types of material up to 9″, with or without leaves. Long or short needle pine and small vine type material are no problem for the MX-9900 PTO wood chipper.
WoodMaxx MX-series wood chippers are equipped with five extreme duty 5/8″ wide EDPM rubber cogged drive V-Belts that are made specifically for WoodMaxx. Cogged V-belts run cooler, and transfer more torque than plain smooth V-belts. Although the OEM belts are very high quality, if the need arises, the standard size BX belts allows you to purchase replacement v-belts at any auto parts store.
The hydraulic hose configuration for the WoodMaxx MX-9900 requires only two streamlined hydraulic hoses. Because of the POW-R-TORQ™ infeed system, we’re able to eliminate many of the components and hoses, traditional open hydraulic systems have. We also utilize standard JIC (joint industrial council) hose fittings that are rated for 5000 psi, so should you need to replace a hydraulic hose, maintenance will be effortless, and parts are easy to find.
The WoodMaxx MX-9900 wood chipper offers a larger 27″ wide x 18″ tall infeed opening that funnels down to 9″ x 9″ to easily accept those crooked branches. This is the largest infeed opening available of any PTO wood chipper in its class.
Safety is paramount on WoodMaxx wood chippers. Located on the top of the In-feed bin, the MX-9900 utilizes an easy to activate hydrostatic auto-feed stop safety bar to disengage the infeed roller in case of an emergency, or to clear the infeed bin if necessary. Simply pull the bar forward to increase the speed, and push it forward to decrease or reverse the In-feed speed and direction. The hydrostatic drive system is so refined that the In-feed speed is fully adjustable from 0-75 ft./min.
The 360-degree MX-9900 PTO wood chipper is equipped with a 360-degree swivel discharge chute. With easy two finger operation, we have incorporated a convenient handle that effortlessly allows you to swivel the discharge chute 360 degrees so that you can direct the chips into a trailer or the back of a pickup truck without having to move the entire machine. Simply push down on the handle and swing the chute, when you release the handle, a spring-loaded pin drops down to lock the chute into position. No tools required.
The WoodMaxx MX-series wood chipper utilizes USA made high tension gas shock. These gas shocks maintain the same tension throughout the entire range of motion. This feature also slows and dampens the downward motion of the infeed roller to prevent the infeed roller from slamming downward, ultimately increasing the longevity of the components. These high-tension gas shocks achieve 185 lbs. of downward force that allows the teeth of the infeed roller to dig into the branches and ensure a smooth entry into the chipper head.
The hydrostatic pump belt tensioner is automatic on the MX-9900 wood chipper. This feature keeps consistent and correct pressure on the drive belt. If the drive belt is too tight, then excessive bearing and/or pump failure is likely. If it’s too loose, it will slip, resulting in loss of performance. This feature eliminates the need to adjust the belt, ensures that proper tension is achieved, and increases the longevity of the pump and bearings. It also saves you the hassle of constant adjustment.
The WoodMaxx MX-9900 American-made wood chipper is equipped with four USA made and offset, reversible dual edge knives installed. These knives are attached to the flywheel. Four knives, and they are offset so that with every 90 degrees of rotation, the knife is taking a slightly different cut of material. This is equivalent to using a serrated knife to cut bread instead of a straight knife. Ultimately, this feature allows for chipping large material without overworking your tractor. The reversible knives means that you get twice the work out of one set! Designed for extreme-duty – there is no better material than A-8 hardened tool steel for superior performance and life. Click here to learn how long your chipper knives will last.
Our MX-9900 PTO wood chipper features a swivel infeed bin, which allows for easy bed knife access and adjustment. Simply remove one bolt for bed knife maintenance. One (1) high quality (A8 tool steel), made in the USA bed knife is standard equipment on our MX-9900SS and MX-9900 wood chippers. This long-lasting, reversible bed knife is designed to last between 40-60 hours on each side, depending on wood species/type.
The WoodMaxx MX-9900 PTO Wood chipper attachment is the only MX-series chipper equipped with a fold up infeed bin. This feature allows the user to simply fold the In-feed bin upward for storage or transport.
All wood chippers will require some routine maintenance like adjusting the gap between the bed knife and the flywheel knives as they wear. This gap is essential to proper operation of the wood chipper. The infeed hopper on the WoodMaxx MX-9900 swings open to expose the bed knife, allowing the user to access the knife to make adjustments. This feature is exclusive to the WoodMaxx MX-9900 wood chipper. Simply remove 2 bolts and the hopper will swing open like a door. Other chippers require the user to crawl into the infeed hopper to change the bed knife or adjust the gap between the bed knife and the flywheel knives.
MX-series wood chippers are now equipped with a convenient tachometer/ hour meter. The tachometer allows the operator to see the actual RPM of the flywheel to ensure that the chipping head is running at the optimal recommended speed. Proper flywheel speed is important to develop the inertia required to chip hard material and evacuate the chamber effectively. The hour meter is helpful to ensure that proper maintenance intervals are kept in accordance with WoodMaxx recommendations. This all-weather meter is waterproof and weather tight.
MX-series PTO wood chippers will mount to any Category 1 or 2 three-point hitch attachment and is category 1 quick hitch ready.
NOTE: A shear bolt torque limited 29” Premium PTO shaft is included with the purchase of any WoodMaxx MX-series wood chipper. Shear bolts are replaceable with a 5/16-18″x 1 1/4″ grade 5 Hex bolt that is readily available at any hardware store.
The WoodMaxx MX-9900 wood chipper comes shipped to you on a wooden skid and is 100% completely assembled. Simply attach the MX-9900 wood chipper to your tractor, lower the in-feed bin, raise the discharge chute, size and attach the PTO shaft (included), and fill the oil reservoir with 2 quarts of 10-W40 motor oil. The WoodMaxx MX-9900 wood chippers are manufactured and assembled right here at our facility and are given a comprehensive 22-point inspection, prior to leaving our warehouse. Follow the user-friendly operator manual and you will be chipping in no time at all.
The WoodMaxx MX-9900 wood chipper comes with a 3-year warranty. At WoodMaxx our service department is staffed with professional certified technicians that inspect each machine before it is shipped. This ensures that you get a trouble-free machine from the get-go. When you need technical help or parts, our courteous staff can help you get what you need from our fully stocked warehouse.
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Purchased the unit from the website. Had several questions answered online and then completed purchase. The unit arrived the following week and I picked up at shipment depot.
Packing was well done, secure and everything was intact. Removed the crate, clipped the metal tie-downs and unloaded with tractor. Setup was very easy and well illustrated in the manual. Added the 10W-40 oil to the hydraulic system. Followed the instructions and adjusted the PTO shaft and installed. Started up the machine and slowly worked the feed in reverse and forward, little air entrapment occurred but it dissipated quickly.
Have many trees down due to recent storms so put the unit through some tough work on day one and it performed very well.
Overall extremely happy with MX-9900, its performance and build quality. Had a few issues getting the invoicing corrected but after 1 1/2 weeks they corrected the issue.
The quality shows from the moment you receive the shipment – the delivery driver even commented on the quality of the shipping container and the unique mortise and tenon like joints that hold the side panels together. Don’t worry about your product getting so much as a scratch during shipping.
Once I opened the container I saw one high quality implement. The paint was on par with the finish you would expect on an automobile. I just wanted to look at it for a while before I started using it because it would surely get scratched up. The user guide is comprehensive and well written. The most arduous task was sizing the PTO shaft (hint – you’ll spend forever using a hacksaw. I found my die grinder worked best).
The chipper performs flawlessly and has almost NO vibration at full operating speed. Seriously – almost no vibration. It ingested and chipped everything I threw at it. Evergreen limbs with their thick branches (those living in the Pacific Northwest will know what I’m talking about) went straight through. I’m glad I chose the larger MX-9900 model. My advice would be to purchase the largest model your tractor can handle.
So there you have it – purchase the MX-9900 with full confidence that you will be getting an implement that you can pass down to your children…
After researching and comparing different chippers I chose the Woodmaxx 9900. I wanted a PTO driven chipper to mount on my 65hp tractor. I went with the 9900 not just because of the 9” capacity, but also because of the heavy flywheel and 4 knife set-up. I also wanted a hydraulic in-feed. We were pleased with the chip size and the ease of using the chippper. We plan to compost the chips and use them for weed control/nutrient cycling in an area planted with fruit trees. Hickory or basswood- it made no difference- the chipper took it.
I purchased the MX-9900 this past year. I researched many different brands and types of chippers (pto vs chippers with own Motor) and felt the MX-9900 was a balance between strengths of each of the different options I researched. having the pto/3pt chipper is very convenient when getting around my farm and cleaning trails, fence lines, pasture and tillable edges. I’ve run mine on a JD 4066r tractor and it runs very well. Chipping large diameter cedars and other soft woods it chews through with ease. I have also put black walnut, oak and Osage orange (hedge), and locust trees through it. You do have to take the Osage orange and black locust a little slower, but that is to be expected. The speed control lever that runs off it’s own hydrostatic pump allows you to slow the speed to match your type of wood and allows you to have a continuous feed while gathering more wood to place back on the infeed.
I’ve been very happy with mine; others have helped me run it and were impressed by the machine as well. My suggestion is when looking at sizes get the biggest one you can afford, this has a nice infeed size, but you will find that while the branches might only be 4-5 inches at times, the branches can get hung up at times and having the 9′ infeed definitely helps it handle large volume, I only wish Woodmaxx had a larger one for me to run.
I used the MX-9900 to chip 2 30ft pine trees and a dead oak that was hard as a rock. took less than an hour. Used my Kubota L2800 to run the chipper. Chipped 6″ logs. Love it – makes chipping easy and quick.