When running into issues with your crusher, you primarily look towards conveyors, belts, wear plates, and other larger components in your machine. But what about the electrical side of the machinery? As a Service Technician, you hear a lot of questions regarding machinery, so 91������ Service Technician Dakota will cover various portable crusher electrical troubleshooting options. As always, if you’re looking for more information regarding the electrical components in your machine, please refer to your owner’s manual. Always apply safety practices such as lock out / tag out and referring to licensed electricians when local/state/provincial/federal law requires.

When I energize the panel, nothing happens. Why?

We often get phone calls regarding this question, and the conversation usually starts the same every time, “Hi, I went to turn the panel on and when I did there was no lights or horns going off.”

This scenario’s answer is often as simple as a loose wire or a stuck relay contact on the back of an E-stop button or the back of an all-motor stop button. The control voltage must make it through the E-stops and all motor stops before any lights are illuminated or horns will sound. Sometimes debris such as dust builds up holding a normally closed (NC) contact open and creating an open circuit condition. All you need to do is clean the circuit and ensure the circuit is closed.

Why is my VFD faulting with an overcurrent fault on startup?

Most of the time, the answer is that the acceleration time is not long enough to get up to speed under load. The acceleration time should be set at 6 seconds to give it enough time to get up to speed without drawing excessive current causing the fault.

Why does the Controls Inc. panel on the diesel drive read “ECU Comms Lost”?

The code “ECU Comms Lost” is an E-stop condition. Check the E-stop buttons to make sure one is not pressed in or that the contact on the back of the e-stop button is not stuck in an open condition. The relay in the Controls Inc. panel can also trigger this code if it has failed.

Why is my return conveyor shutting off and everything after it?

This condition is often caused by a voltage drop, more specifically when the belts slip on the generator. When the belts slip, the RPMs decrease at the generator, causing a decrease in voltage output from the generator.

This could also occur if the return conveyor has a VFD and the VFD faults, stopping the conveyor and everything behind it. This is because the control panels are designed with an electromechanical interlock to ensure a correct operational sequence. If it is faulting, be sure to correct what is causing the fault, whether it be excessive build-up, something stuck in the tail pulley, or failing components putting strain on the motor.

Why am I not getting 480 VAC to the control panel?

This question is geared towards whether you have a generator on the plant rather than line power. If your control panel is connected to line power and you don’t have 480 VAC there is an issue with your line power.

For generator issues, the first thing you need to do is make sure the engine RPM is at least 1800. Some generators don’t have automatic voltage regulators (AVR’s), so the generator relies on that engine RPM to be at 1800. The generators with AVRs can be adjusted via the voltage dial to get it right at 480 VAC.

Another thing that could prevent you from having the correct voltage at the panel if your belts are loose and are slipping. If that is the cause, please refer to the previous question.

Knowing Where to Get the Information You Need for Portable Crusher Electrical Troubleshooting

The most important thing to know when it comes to rock crusher maintenance is where to find the information you need for your portable crusher electrical troubleshooting needs, and more. Not only do you have an owner’s manual with plant specific information, but as an 91������ user, you are part of a wide network of authorized dealers that are local and available to help you along your journey. Additionally, 91������’s team of Service Technicians are available to answer any questions you may have that haven’t already been answered in previous Service Questions.

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This “Service Questions” is about a specific part of your crusher system and while it may seem like a small part, it can have large issues if it’s not taken care of properly. A sheave is a grooved pulley or wheel that is used to guide conveyor belts that handle heavy loads such as aggregate, concrete, and asphalt. Maintaining your sheaves and belts, by checking them daily, can help with daily production by eliminating unnecessary downtime. 91������ Service Technician, Mark, will go over some tips and tricks to maintaining your sheaves and belts.

Sheave Preventative Maintenance Routine

If a belt can’t grip the sheave properly, you will have a loss of RPMs that are required to do a specific function.�� In the case of a generator bult, it may not produce your full voltage that is required to operate your crusher. It’s important that you check your sheaves using the appropriate tools.

You’ll want to check that your sheaves are flush with the appropriate gauge. If the gauge is not flush with the sheave’s ridges, it is worn down and will cause belt slippage.

Of note, the crushing of asphalt can create significant amounts of dust which can lead to premature wear on your sheaves.

If you’re looking for sheave gauges, new sheaves, or new belts, reach out to 91������’s parts team or your authorized local dealer.

Belt slippage from worn sheaves or improper tension can result in sheaves not rotating at the expected speed.�� Depending on the diameters of the sheaves they may rotate at different RPMs in the system.���� The way to check this is by applying reflective tape on all your sheaves and watching them run. Check your sheave RPMs with a Photo Tach. For example, if the engine is running 1800 RPMs your sheave on the motor should also be spinning 1800 RPMs and the driven sheave will spin at an RPM determined by the diameter ratio. While the crusher is running, assure that all sheaves are spinning without unexpected differences in speeds.

If the sheaves are not spinning at the expected speed as the engine, you need to check the belt tension.�� See owner’s manual for tensioning process.

Belts Preventative Maintenance Routine

Belts and sheaves can also be worn and not have proper contact surfaces for power transmission. The drive belts and sheave gauges that can determine the amount of wear.

The belts and sheaves are labeled with the size designation.�� When you put in a belt gauge you can determine if the belt and sheave is worn beyond its wear limit. For an example using the image below, note that the belt shown is marked with a “B” so the belt should land on gauge line B. If your belt does not match up with the gauge, then you’ll need to replace the belt.

Getting the Right Parts

If you need to replace any parts that are worn, such as sheaves and belts, you can reach out to 91������’s Parts Team or any authorized dealer for assistance. Always refer to your owner’s manual for information that’s specific to your machine and practice maintenance safety by using the lock out / tag out method. 91������ is with you every step of the way, from start up to preventative maintenance and beyond.

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As we saw in 91������ Service Manager John’s recent Service Questions, a common area on rock crushing equipment that leads to constant questions is the conveyors. From conveyor belts not staying aligned to head pulley slippage, there are various items on the conveyors that require preventative maintenance and routine checks. Service Technician, Dakota, will run through the various questions that come from conveyor maintenance.

Conveyor Maintenance at a Glance

Common issues with conveyors involve the belt. For this Service Question, we will focus on the conveyor belt itself and not the motors or bearings involved in the pulleys. A common issue is the conveyor belt not staying centered. This can be caused by:

• Uneven Loading
  • To fix this, you should adjust the loading to be more even by dumping from a chute to the center of the conveyor belt.
• Worn or Misaligned Components (Pulleys, Idlers)
  • Check for worn or misaligned components by inspecting all pulleys and idlers to ensure they are free of any built-up material and ensure that the pulleys and idlers are properly aligned.
• Incorrect Tension or a Crooked Belt Splice

��How often should conveyor belts be inspected or spliced?

Conveyor belts should be inspected daily to ensure the health and performance of the conveyor. You should be looking for various types of conveyor belt damage, such as cuts, frays, cracks, and wear. Make sure to clean off any debris buildup on the belt, pulleys, and rollers. Also, do a visual inspection to see if the conveyor belt is tracking straight and the splice is in good condition. Listen for unusual noises while in operation, such as grinding or squeaking, which could be misaligned or failing components.

How do I set proper belt tension?

Put marks on the nontensioned belt at exactly 1000 mm from the splice. The marking must be done on the left and right side of the conveyor belt. Tension the belt and let it turn a few times to equally divide the tension. Then, measure the elongation and adjust the belt tension if necessary. See your owner’s manual for the recommended elongation of the conveyor belts.

What is causing slippage at the head pulley?

To drive a conveyor belt without slippage, and to track it in a proper way, a certain tension of the conveyor belt is necessary. See your owner’s manual for the recommended tension.

Built up materials such as fines material will increase the friction between the conveyor belt and the head pulley, so it is very important to clean your conveyor properly. If slippage continues the belt could damage the lagging of the head pulley by rubbing it smooth, causing it to struggle to grip the conveyor belt.

An example of a head pulley that is missing half the lagging.

How can I reduce material buildup under the conveyor belt?

You can reduce the buildup under a conveyor belt by ensuring the belt flashing or skirting is in good condition and making good contact with the conveyor belt. The skirting is adjustable by clamp plates. To adjust the skirting to avoid gaps in the flashing, simply loosen the clamp plates and pull the skirting down. If you can no longer pull the skirting down, you need to order new belt skirting.

After you have made sure your belt skirting is adjusted properly, inspect your belt scrapers and ensure they are making good. If the belt scrapers are not making good contact, adjust the scraper toward the belt by loosening the tensioner retainer screw and put tension on the scraper. You can do that by using a wrench to build tension, then tightening the retainer screw back down.

Don’t Let the Tension Get to You – Reach Out!

As you already know, a simple-looking part in rock crushing equipment doesn’t always mean it’s immune to preventative maintenance. What is simple is knowing the resources available to you. Not only do you have your owner’s manual, but you have a network of authorized dealers, a team of 91������ parts experts, and 91������ Service Technicians ready to help keep your tension to a minimum.

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Now that Spring is officially here, that means warmer temperatures to help with the startup of the plants that were��hibernating��over the winter.��Let’s��get you��up and��crushing��it by looking over some of the following��recommendations for your��plant prior to starting up.����

The following recommendations assume that you followed the��appropriate procedures��to shut down the equipment. If you are unaware of the��shutdown��procedures, please check out��this blog.��

Your service manuals and vendor books have more detailed information and some of the following information may not apply to your equipment. If you have more questions regarding your specific equipment, reach out to our service team.��

��

Starting Up Feeder Drives and Screens��

Different types��of feeder drives, such as Simplicity and Diester, may have different specific instructions. If you are not sure of the��appropriate start-up��procedures, refer to your service manuals, vendor books, or reach out for specific information on your plant.��

Prior to placing the Deister vibrating feeder drive and screen back into operation, drain oil from the mechanism tube and refill with the correct type and amount of oil.��

To place��a simplicity vibrating��feeder��drive��and screen��back in operation, remove plugs, re-install the vents, run for��40 hours,��then change the oil.��

��

Torque-Arm Speed Reducers��

If you��drained��the oil due to your equipment being inactive for a period of 3 months or more, replace the oil with a vapor��phase��corrosion inhibiting oil.��

��

Starting Up Gasoline-Powered Hydraulic Unit��

When you start up your��equipment��the valves will open and close normally as the engine is starting.��It’s��recommended that you change the oil if you did not do it prior to shutting off.����

��

Starting Up Diesel Engines��

Each engine manufacturer (e.g.��John Deere, CAT, etc.) has different procedures for their engine. See the engine manual shipped with the original purchase of the equipment for the proper procedure.��

 ��

Spring to your machine’s start up procedure.��

Following the above recommendations, and any recommendations found in your owner’s manual, you should be up and crushing it in no time. Don’t forget to order any spare parts you might need throughout your crushing journey. While it might not seem like an important step in your start up procedure, it could help you save downtime. Reach out to an 91������ Parts Expert to see what parts are recommended that you have on hand.��

If you have questions about other parts of your machine, reach out today. Our��authorized��dealers��and��service representatives��are ready to��assist��you to get you up and running appropriately.����

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Different material processing jobs present unique challenges, and with the current world market, buying the right crushing equipment is critical to keeping your company up and crushing. One of the first questions people often ask about crushing equipment is whether they should buy a portable rock crusher or a mobile one.

Although these styles of rock crusher plants may appear similar, their distinctions could impact the profitability of your business and deserve a closer look. Here, we explore the key differences between mobile and portable rock crushers, helping you determine which type best suits your specific crushing needs.

Comparing Mobile vs. Portable Rock Crushers: At a Glance

Mobile Rock Crushers

Mobile rock crushers are specialized equipment used in mining and construction industries to break down large rocks into smaller pieces. Here’s an overview of mobile rock crusher advantages and disadvantages:

Pros:

• Self-propelled design significantly reduces time and labor required to move machines between job sites
• Track-based mobility allows navigation of difficult terrain that wheeled units struggle with

Cons:

• Complex mobile plants (especially those with screens on discharge conveyors) often require partial disassembly before relocation
• Compact design results in minimal clearance, making maintenance and servicing difficult
• Compromised distance between crusher discharge and plant belt
• Limited space and smaller feed hoppers compared to portable plants lead to reduced production capacity
• Transportation challenges may require specialized trailers or multiple loads for larger units

—

Portable Rock Crushers

Portable rock crushers offer an alternative to mobile units with their own set of advantages and limitations. Here’s what you should know about portable rock crusher benefits and drawbacks:

Pros:

• Superior production capacity generates higher volume of end products than comparable mobile plants
• Maximized space design allows steel and large-volume materials to pass efficiently onto the plant discharge belt
• Open design facilitates easier maintenance, reducing downtime
• Versatile screening capabilities–can feature two or three-deck screens to produce multiple products simultaneously

Cons:

• Generally require tractors for movement around job sites
• Larger portable plants typically need partial disassembly for transport (hopper feeder, magnet, etc., may need separate trailers)
• Some specialized models like RapiDeploy® plants are available as single-pull units

Frequently Asked Questions About Mobile vs. Portable Rock Crushers

What are the main differences between mobile and portable rock crushers?

Mobile crushers are self-propelled and can move around the job site, while portable crushers require towing for transportation.

Which type is better for frequently changing job sites?

Mobile rock crushers are generally better suited for projects that require frequent relocation due to their self-propelled nature and quick setup time.

Are portable crushers less efficient than mobile crushers?

Not necessarily. Portable crushers can be just as efficient and sometimes offer larger capacities, making them ideal for longer-term projects.

Can both types of crushers handle the same materials?

Yes, both mobile and portable crushers can process a wide range of materials, including rock, concrete, and asphalt, depending on the specific model and configuration.

How do I choose between a mobile and a portable rock crusher?

Consider factors such as the frequency of relocation, project duration, site conditions, and required capacity. Consult with a crushing equipment expert to determine the best option for your specific needs.

Find the Right Rock Crusher with 91������

When it comes to mobile vs. portable rock crushers, it’s crucial to consider your business needs and applications to select the right one. Ready to find the perfect mobile or portable rock crusher for your project? Contact 91������ today, or an authorized dealer, for expert advice and a free consultation. We’re here to answer your questions and help you find the best equipment for your site!

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It’s been a year since John stepped into the role of Service Manager. Throughout this time, he has established relationships with various authorized dealers and customers by answering their burning crusher questions. While answering these questions, he noticed several questions were recurring. To celebrate his first year as Service Manager, join John as he answers the top five frequently asked questions he’s received.

1. Why is my clutch fusible plug leaking fluid?
   • Your impactor may be getting overloaded and therefore overheating the clutch. The plug has a solder compound in it so that if the fluid in the clutch gets too hot, the fluid will leak out. This is done to prevent overheating and the possibly of causing permanent damage to the clutch.
   • Another solution would be to learn the proper flow of material for your machine to avoid overloading your impactor. Overloading your impactor causes a variety of issues, so it’s important to start with good practice to avoid any unnecessary downtime.

An example of good material flow.

2. Why isn’t my machine running evenly? Why are my conveyor belts wearing unevenly?
   • One of smallest differences that can cause significant issues in your machine is your machine not being level. If your machine is not level, it will cause material to shift and not run evenly through the plant. This can lead to belts leaking materials, flashings being worn out, wear plates and blow bars wearing unevenly and will affect the performance of the feeder and screen.

3. Why is there a gap in the flashing?
   • Flashing is adjusted to the belts when the unit is built and tested in the factory. Once material is on the belts, they have weight added onto them, causing the belt to sag. That is why you see gaps between the belts and flashing. After your first couple of runs, the skirtboard clamps will need to be loosened, and the flashing adjusted accordingly.

4. Why did my feeder shut off, and my code says low voltage? Is it because there’s too much material on my screen?
   • When it comes to the feeder shutting off, most of the time the drive belt just needs to be tightened or replaced. If the drive belt looks to be good, a worn-out drive sheave could also cause a low voltage code.
   • When it comes to the level of material on your screen and feed issues, it’s important to adjust the feeder belt speed to accommodate the screen. Once the machine is up and crushing, watch the material flow on the belts and screen. If there seems to be a small amount of material on the belts and the screen isn’t loaded, you can turn the feeder up to feed more material to the impactor. On the other hand, if the belts look overloaded and screen is backing up or getting material over the sides turn the feeder down to decrease the flow.

5. Why does one blow bar have more material above the locking rod pocket when I pull them to flip?
   • If there is extra material in the pocket, it might have been from the wedge being loose. When replacing the blow bars, you need to tighten the wedge screws in each wedge. When flipping or replacing the blow bars, do not torque and insert set screw and glue at first. Once everything is properly set, and the lid is properly closed, turn on the crusher and let it get up to speed. Doing this allows the blow bars to “seat” or pull out as far as they can against the locking rod. If the bar moves when the impactor is started, you may hear a loud bang. That is the bar moving into place as the rotor gets up to speed. After it has been run at full speed for a little bit, follow the proper lock out / tag out procedures prior to opening the lid again. At this point, retighten the wedge bots and torque to the recommended setting.
   • As a side note, when you insert the set screws, you can insert a small amount of paper towel to help keep the hex in the cap screw from filling with glue.
   • For more information about flipping blow bars, check out this previous Service Question with James.

Knowing Who to Call

The last year of being in the service manager position has been an interesting year. John spent the previous 12 years as 91������’s Assembly Supervisor, spent time as the assembly team leader, and helped build impactors and jaws for several years. Going from the various positions, he has had the opportunity to learn even more about the equipment 91������ builds. Throughout this past year, John has been able to go to jobsites with the service technicians to get some hands on in the field experience to accentuate this experience in the shop.

“In the areas I don’t excel in, on the service side, I have listened and have learned a lot in the last year and know that I still have a lot to learn. Working with our service technicians, I am also learning from them, and I am happy to join you in your journey to learning more about rock crusher maintenance.”

Looking back at the past year, it has been a year of learning not only for John as the new service manager, but for everyone following along on this “Service Questions” journey. It’s important to always stay curious and ask questions before servicing your machine instead of causing unnecessary downtime.

When you have questions or concerns about the operation of your machine, it’s important to know the resources available to you to find that answer. If you cannot find the answer you’re looking for in your owner’s manual, you can reach out to your local, authorized dealer or reach out to 91������’s Service Team.

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����dz� horizontal shaft impactors t�� jaw crushers, 91������ manufactures some of the toughest and most powerful crushing equipment on the market, empowering producers to conquer any size crushing project. ��

Not only that, but 91������’s team of engineers continue to innovate our comprehensive line of crushing and screening products, working alongside customers, to design crushing equipment that solves pertinent challenges in today’s crushing industry. ��

On December 3rd,����the four pieces of equipment that will be on display at their Booth 31414 at��: the��1400-45OC, the����-�ʱ����Գ�®, and the brand new TalonTrax™ and TalonStack™.  ��

��

Primary Features of the TalonTrax™��

Easily removable discharge conveyor allows for quick access to under-crusher��area��for inspection, maintenance, and cleaning. Easily and quickly inspect and��maintain��conveyor while removed.��

Cross-belt, permanent magnet removes steel contaminants from crushed material. Magnet is reversible to allow steel��discharge��from either side and does not need to be removed for transport.��

Dual-motor, under-crusher pan feeder with industry-leading discharge clearance��more than��23” enables greater material flow and virtually��eliminates��clogging.��

Grizzly bypass chute and cross conveyor with flop gate to allow for either removal of the material that passes through the grizzly deck for stockpiling or blending back with the crushed material. Conveyor folds for transport or��remains��out of way of��operating��when not in use.��

��

Additional Features��

The discharge conveyor height of 11’ 1” for feeding directly onto stockpiling conveyor, screening plant, or��some trucks.��The heavy-duty��hopper-construction sized for feeding with a loader or excavator. It has a smart feeder drive��system that��monitors��engine load for more efficient production.��

��

Want More information?��

For more information about the brand-new 91������ TalonTrax™, you can find more additional features and find the spec sheet here. You can also contact 91������ to speak with a Team Eagle representative, or an��authorized dealer, who will be happy to share further details.  ��

Additionally, you can see the TalonStack™,�� UltraMax® 1400-45OC,��and��E-Plant��Triple-Deck��at��, March 3-7, 2026. 91������ is still offering discounts for badges, hotels, and flights using��this link. Remember, the sooner you book, the bigger the discount. ��

We look forward to seeing you at CONEXPO-CON/AGG at��Booth 31414. ��

��

��

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Thank you for following along in another year of our “Service Questions” series. We are always happy to share our expertise when it comes to our rock crushers and how to maintain them and can’t wait to share more information next year. For now, take a break and refresh your knowledge with 2025’s Service Questions.

General Safety

This year let’s make it our resolution to stay vigilant about protecting ourselves with the knowledge of rock crusher safety.

During start-up, it’s important to always follow the instructions the factory field service technician provides or the instructions in your operator’s manual along with your employer’s site approved plan. While the plant is in operation, it’s imperative that you follow all safety procedures for the safety of yourself and the machine. As with any piece of equipment, rock crushers are also in need of regular maintenance. To ensure that maintenance is done correctly, make sure you follow the instructions that were given at start-up by your field service technician and the information in the operator’s manual.

Read more about general safety with rock crushers.

Looking Back at over 35 Years of Eagle Service

Join us in honoring BC’s 15 years of being 91������’s Service Manager with 15 facts, stories, and challenges he faced over the years.

For over 35 years, Bill Compton (BC) has been the backbone of 91������, setting the standard for exceptional service, leadership, and innovation. As we celebrate his retirement, we reflect on his unwavering dedication, the countless challenges he has turned into opportunities, and the lasting impact he has had on our team and customers alike. BC’s passion and commitment have not only shaped our company’s success but has inspired us all to aim higher every day. BC worked at 91������ for a total of 42 years, serving as Group Leader over the Jaw Crusher assembly, Cobey composter assembly, and small crushing plant assembly at the previous Galion facility in 1986; temporary Plant Manager at the new, and current, Bucyrus location from 1994 to mid-1995; Service Technician starting in 1991; and finally awarded the title of Service Manager in 2010. Join us in honoring BC’s 15 years of being 91������’s Service Manager with 15 facts, stories, and challenges he faced over the years.

Read more about BC’s journey at 91������.

Parts that Require Regular Replacement

The regular placement of parts is not just a best practice; it’s a necessity for keeping heavy equipment running smoothly and safely.

Heavy equipment is the backbone of industries like construction, agriculture, and mining. These machines, such as rock crushing equipment, take on demanding tasks daily, making their reliability crucial for productivity and safety. However, without regular maintenance, even the most robust equipment can break down unexpectedly, leading to costly repairs, project delays, and safety hazards. Implementing a consistent maintenance routine ensures that your heavy machinery operates efficiently, extends its lifespan, and minimizes downtime—ultimately saving your business time and money.

Read more about Parts that Require Regular Replacement.

Bearings and Shafts

Explore the best practices for maintaining bearings and shafts to keep your heavy equipment running optimally.

Bearings and shafts are fundamental components of heavy machinery, playing a crucial role in ensuring smooth operation and efficiency. Bearings reduce friction between moving parts, allowing machines to run with minimal wear and tear, while shafts serve as the backbone, transmitting power and rotational motion. Proper maintenance of these components is essential to prevent breakdowns, extend machinery lifespan, and reduce costly repairs. Neglecting them can lead to premature failure, decreased performance, and even hazardous working conditions.

Read more about Bearings and Shafts.

What to Check Before Buying Used Crushers

Get crucial tips for purchasing used crushing equipment. Our used rock crusher checklist helps you find the best used crusher for your needs.

When it comes to investing in rock crushing equipment, buying used can be a smart way to save money without sacrificing performance, if you know what to look for. Whether you’re expanding an existing operation or just getting started in the rock crushing business, used crushers can offer reliable service at a fraction of the cost of new machines.

However, the key to making a sound purchase lies in knowing which features and conditions to inspect.

Read more about What to Check Before Buying Used Crushers.

Ensuring Your Rotor Lasts

With proper care and timely maintenance, a rotor can stand the test of time.

When it comes to keeping your rock crusher performing at its peak, the rotor is the heart of the operation. Responsible for generating the crushing force and managing material flow, the rotor takes on intense wear and impact with every cycle. That’s why consistent servicing of your rotor is critical. Not only to avoid downtime, but to ensure your equipment’s longevity. With proper care and timely maintenance, a rotor can stand the test of time and serve your operation for generations.

Read more about Ensuring Your Rotor Lasts.

Component Inspections

By committing to thorough and timely crusher inspections, you’re investing in the long-term reliability of your operation.

When it comes to keeping your rock crusher running at peak performance, component inspections are one of the most effective tools in your preventative maintenance arsenal. Regular inspections of critical parts like bearings, belts, liners, and rotors can help identify wear and tear long before it leads to costly downtime. These routine check-ups not only extend the lifespan of your crusher but also support safer operation and better production quality. By committing to thorough and timely inspections, you’re investing in the long-term reliability of your crushing operation.����

Read more about Component Inspections.

Understanding Variable Frequency Drives (VFDs)

When you understand the role your VFD plays, you’re not just protecting a single component, but your entire crushing operation.

Variable Frequency Drives (VFDs) are becoming an essential component in modern rock crushing operations, offering improved control, efficiency, and protection for your equipment. By precisely regulating motor speed and torque, VFDs help reduce mechanical stress, optimize energy usage, and adapt crusher performance to varying feed conditions. But beyond their operational benefits, understanding how your VFD functions, and the early signs of potential issues, is key to implementing effective preventative maintenance. A well-monitored VFD can extend the lifespan of your crusher, minimize costly downtime, and ensure consistent production output.

Read more about Understanding Variable Frequency Drives.

Training on Your Equipment’s Operation and Safety

Here at 91������, we offer both onsite equipment training and classroom training at our Headquarters in Galion, Ohio.

When it comes to operating heavy equipment, there’s no substitute for the knowledge of those who designed and built it. A manufacturer’s service team doesn’t just know the machine, they understand its engineering, its limits, and the best practices to keep it running at peak performance. Listening to their advice and taking advantage of equipment-specific training ensures that your team is not only using the machinery correctly but also maximizing its lifespan, efficiency, and safety.��

Read more about Training on Your Equipment’s Operation and Safety.

Tools Needed to Work on Your Rock Crusher

From heavy-duty wrenches to safety gear, every tool plays a critical role in keeping your crusher running smoothly and safely.

Working on and operating rock crushing equipment requires more than just skill, it demands the right tools for the job. From heavy-duty wrenches and torque tools for maintenance to gauges, diagnostic devices, and safety gear for daily operation, every tool plays a critical role in keeping your crusher running smoothly and safely. Understanding what’s needed and how to use each piece properly can mean the difference between efficient production and costly downtime.

Read more about the Tools Needed to Work on Your Rock Crusher.

The post Service Questions: 2025 Recap appeared first on 91������.

����dz� horizontal shaft impactors t�� jaw crushers, 91������ manufactures some of the toughest and most powerful crushing equipment on the market, empowering producers to conquer any size crushing project. ��

Not only that, but 91������’s team of engineers continue to innovate our comprehensive line of crushing and screening products, working alongside customers, to design crushing equipment that solves pertinent challenges in today’s crushing industry. ��

On December 3rd, the four pieces of equipment that will be on display at their Booth 31414 at : the 1400-45OC, the ��-�ʱ����Գ�®, and the brand new TalonTRAX™ and TalonSTACK™. ��

��

Primary Features of the UltraMax® 1400-45OC��

Discharge material feeds to a separate conveyor coming out of the side of the crusher at a 90-degree angle. Totally self-contained, reliable diesel/ electric or all-electric power. You won’t have to worry about hydraulic leaks and failures shutting you down.��

Available in-line electro-magnet on side-discharge conveyor. Hydraulic lift and leveling system enables quick set up and tear down by using the hydraulic run-on legs.��

Features the industry’s first LIFETIME ROTOR WARRANTY on its solid-steel, three-bar, sculptured rotor—the industry’s heaviest—to keep you up and crushing. (North America only.)��

��

Additional Features��

The 1400-45OC replaces dual crusher systems for a much lower initial investment and for greatly reduced maintenance, fuel and transportation costs. It features a unique two-step, 5’ grizzly deck to remove fines before crushing. Standard grizzly bypass chute and available cross-belt conveyor with flop gate to allow for either removal of the material that passes through the grizzly deck for stockpiling or blending back with the crushed material.��

Want More information?��

For more information about the 91������ UltraMax® 1400-45OC, you can find more additional features and find the spec sheet here. You can also contact 91������ to speak with a Team Eagle representative, or an authorized dealer, who will be happy to share further details. ��

Additionally, you can see the UltraMax® 1400-45OC, E-Plant®Triple-Deck, and TalonTRAX™, at , March 3-7, 2026. 91������ is still offering discounts for badges, hotels, and flights using this link. Remember, the sooner you book, the bigger the discount.��

We look forward to seeing you at CONEXPO-CON/AGG at Booth 31414.��

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The post Everything You Need to Know About the UltraMax® 1400-45OC�� appeared first on 91������.

����dz� horizontal shaft impactors t�� jaw crushers, 91������ manufactures some of the toughest and most powerful crushing equipment on the market, empowering producers to conquer any size crushing project. ��

Not only that, but 91������’s team of engineers continue to innovate our comprehensive line of crushing and screening products, working alongside customers, to design crushing equipment that solves pertinent challenges in today’s crushing industry. ��

On December 3rd, the four pieces of equipment that will be on display at their Booth 31414 at : the 1400-45OC, the ��-�ʱ����Գ�®, and the brand new TalonTRAX™ and TalonSTACK™. ��

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Primary Features of the E-Plant®

The revolutionary ��-�ʱ����Գ�® is the industry’s only true high production triple-deck screening/crushing system on one chassis—transportable in one pull—for the aggregate, asphalt, and recycling industries.��

The ��-�ʱ����Գ�® tows in one pull. (Jeep available where required. Check with your DOT.) It holds a triple-deck screening/crushing system that enables processing of up to five products (including three spec products) at one time.��

Reversible cross conveyor enables return of two decks back to increase production well beyond 40 percent, compared to our industry-leading UltraMax® 1200-25 CC, with no increase in wear and maintenance costs.��

It also allows for an optional, easy-on, easy-off electromagnet assembly.��

The ��-�ʱ����Գ�® features the industry’s first LIFETIME ROTOR WARRANTY on its solid-steel, three-bar, sculptured rotor—the industry’s heaviest—to keep you up and crushing. (North America only.)��

Additional Features��

The control panel has interlocked controls with breakers for motor protection. The ��-�ʱ����Գ�® replaces Jaw/Cone/Screen multi-unit systems for a much lower initial investment while maintaining a high production of cubical spec product. Greatly reduces maintenance and fuel costs and is easily transported.��

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Want More Information?��

For more information about the 91������ ��-�ʱ����Գ�® Triple-Deck, you can find more additional features and find the spec sheet here. You can also contact 91������ to speak with a Team Eagle representative, or an authorized dealer, who will be happy to share further details. ��

Additionally, you can see the ��-�ʱ����Գ�®, along with the UltraMax® 1400-45OC and TalonTRAX™, at , March 3-7, 2026. 91������ is still offering discounts for badges, hotels, and flights using this link. Remember, the sooner you book, the bigger the discount.��

We look forward to seeing you at CONEXPO-CON/AGG at Booth 31414.��

��

The post Everything You Need to Know about the E-Plant appeared first on 91������.