The Complete Guide to Servicing Your H-Class Dust Extractor

Practical Maintenance Tips, Daily Checklists, FAQs, and Best Practices

Whether you grind concrete, remove coatings, polish floors, chase walls, or cut masonry, your H-Class dust extractor is one of the most important pieces of equipment on site. It protects your health, captures hazardous respirable crystalline silica (RCS), keeps your workplace cleaner, and helps your grinders perform at their best.

Unfortunately, many contractors spend thousands of dollars on grinders and diamond tooling while giving very little attention to the machine that protects both them and their investment.

Regular maintenance isn’t just about extending the life of your vacuum. It also helps maintain suction, reduces costly repairs, improves dust collection, and ensures your machine continues to operate safely.

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Why Servicing Your H-Class Vacuum Is So Important

A well-maintained H-Class vacuum provides:

• Maximum dust extraction
• Better grinder performance
• Longer filter life
• Reduced motor wear
• Lower repair costs
• Better operator safety
• Improved compliance with workplace safety requirements

Ignoring maintenance almost always costs more than spending a few minutes cleaning the machine after each job.

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Make Vacuum Maintenance Part of Every Job

Professional contractors don’t wait until something breaks.

The best operators build vacuum maintenance into their daily routine.

Think of it like cleaning your trowels or changing the oil in your ute. Five to ten minutes at the end of every day can prevent thousands of dollars in repairs.

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The Golden Rule

Your H-Class vacuum should be cleaned after every single use.

Do not leave concrete dust sitting inside the machine overnight unless it is absolutely unavoidable.

Fine silica dust finds its way into every corner of the vacuum. Over time it becomes harder to remove, blocks airflow and can eventually damage expensive components.

Cleaning the machine while the dust is still fresh is quicker, easier and far more effective.

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Daily Maintenance Checklist

Before Starting Work

Take two minutes before switching the vacuum on.

Check:

✅ Power lead

Look for cuts, crushed insulation or exposed wires.

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✅ Plug

Ensure the plug is not damaged or loose.

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✅ Hose

Check for:

• Splits
• Holes
• Loose cuffs
• Crushed sections

Even a small air leak can noticeably reduce suction.

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✅ Dust Bag

Do not start the day with yesterday’s full dust bag.

If it is over half to three-quarters full, replace it before starting work.

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✅ Filters

Inspect for:

• Tears
• Damage
• Poor sealing
• Excessive dust loading

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✅ Latches

Ensure every latch closes properly.

Air leaks reduce airflow.

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✅ Wheels

Check that castors roll freely.

Dragging a vacuum across the floor damages wheels and puts extra strain on the frame.

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✅ Listen to the Vacuum

A vacuum usually tells you when something is wrong.

Listen for:

• Different motor sounds
• Whining
• Rattles
• Reduced airflow
• Air leaks

If it sounds different today than yesterday, investigate before continuing.

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End of Every Job Checklist (The Most Important Part)

Many contractors simply load the vacuum into the trailer and drive away.

That is one of the biggest mistakes you can make.

1. Empty the Dust Bag

Always empty or replace the dust bag before transporting the machine whenever practical.

Why?

Every bump in the road shakes the vacuum.

This allows dust to:

• Compact into filters
• Work into seals
• Increase filter loading
• Make the next clean-out much harder

A fresh bag also means you’re ready to start work immediately the next morning.

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2. Clean the Outside

Concrete dust attracts moisture.

It also scratches plastic surfaces over time.

Use:

• Damp microfibre cloth
• Soft brush
• Low-pressure cleaning methods recommended by the manufacturer

Clean:

• Lid
• Wheels
• Handles
• Power lead
• Hose
• Tool sockets

A clean machine is easier to inspect for damage.

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3. Check the Hose

Disconnect the hose.

Look through it.

Small chunks of concrete can become lodged inside bends.

Blocked hoses reduce airflow dramatically.

A simple broom handle or flexible drain rod can often remove stubborn blockages (take care not to damage the hose).

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4. Inspect the Hose Ends

Most air leaks occur here.

Check for:

• Loose cuffs
• Worn rubber
• Cracks
• Broken locking clips

Replacing a $20–$50 cuff is much cheaper than losing suction every day.

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5. Clean Around Cooling Vents

Motors need airflow to stay cool.

Dust packed around cooling vents traps heat.

Never block these vents with tape, plastic bags or clothing during transport.

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6. Check Your Filter Cleaning System

If your machine has an automatic or manual filter cleaning system:

Make sure it is working correctly.

If it suddenly becomes less effective, investigate before continuing to use the machine.

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7. Store It Properly

Don’t leave your vacuum:

• Sitting in the rain
• Filled with wet slurry (unless designed for wet pickup)
• In direct weather
• Covered in concrete dust for weeks

Store it somewhere clean and dry.

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Practical Tips That Save Money

Carry Spare Dust Bags

Keep several spare bags in your vehicle.

Running out usually happens on the biggest job.

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Carry a Spare Hose Cuff

Hose cuffs crack more often than people realise.

Having one spare can save an entire day’s work.

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Label Service Dates

Use a permanent marker or service sticker.

Write:

• Filter changed
• Motor serviced
• HEPA replaced
• Next inspection due

Everyone using the machine knows its history.

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Blow Out the Outside Only

If permitted by the manufacturer, use compressed air only on the outside housing or external cooling fins, never directly on HEPA filters or in a way that could release hazardous dust into the air. Follow appropriate dust control procedures.

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Keep One Vacuum Per Grinder

If possible, dedicate vacuums to particular grinders.

Constantly swapping hoses and fittings increases wear.

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Replace Cheap Accessories

A leaking hose costs productivity every single day.

Premium hoses often last much longer.

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Signs Your Vacuum Needs Immediate Attention

Stop using the machine if you notice:

• Burning smell
• Smoke
• Reduced suction
• Airflow alarm
• Torn dust bag
• Torn filter
• Dust escaping
• Electrical damage
• Loud bearing noises
• Cracked housing

Ignoring these signs usually turns a small repair into a major one.

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The Biggest Mistakes Contractors Make

Overfilling the dust bag

Continuing to use damaged hoses

Ignoring airflow alarms

Using poor-quality replacement filters

Not cleaning the machine after every job

Running without the correct dust bag installed

Storing the machine full of dust

Blocking cooling vents

Leaving damaged seals unrepaired

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Frequently Asked Questions

Should I clean my vacuum every day?

Absolutely.

Even if it appears clean, hazardous dust settles on the outside of the machine and inside key components. A quick clean after every job makes inspections easier, helps maintain performance, and reduces contamination during transport.

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Should I empty the dust bag every day?

Yes, whenever practical.

Transporting a vacuum with a full dust bag allows dust to shift around inside the machine, increasing contamination of filters and making the next clean-out more difficult.

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How full should the dust bag get?

Don’t wait until it is completely packed full.

Replacing the bag when it reaches roughly 50–75% capacity helps maintain airflow and reduces stress on the filtration system.

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Why has my suction suddenly dropped?

Check these first:

• Full bag
• Dirty pre-filter
• Blocked hose
• Air leak
• Damaged seal
• Clogged tool

Most suction problems are simple to fix if caught early.

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Can I tape up a split hose?

Only as a temporary emergency measure to finish a job if it is safe to do so.

Replace damaged hoses as soon as possible.

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Can I vacuum water?

Only if your vacuum is specifically designed, configured, and approved by the manufacturer for wet collection.

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Final Thoughts

Your H-Class vacuum is far more than just another piece of equipment. It is a critical safety device that protects your health, your team, and your business while helping your grinding equipment perform at its best.

Developing a simple routine—inspecting the machine before work, emptying the dust bag, cleaning the vacuum after every job, checking hoses and seals, and storing it correctly—takes only a few minutes but can save thousands of dollars in repairs and significantly extend the life of your equipment.

A clean vacuum is a more efficient vacuum. More importantly, it is a safer vacuum.

At Diamond Tool Warehouse, we stock professional H-Class dust extractors, replacement filters, dust bags, hoses, accessories, and servicing parts to help Australian contractors keep their equipment operating safely and efficiently.

Introducing the New Evotech EVO36 H-Class Dust Extractor

Diamond Tool Warehouse is proud to introduce the new Evotech Performance EVO36 H-Class Dust Extractor—a powerful professional dust extraction system developed for concrete grinding, polishing, coating removal and demanding surface-preparation projects.

We understand that effective dust extraction is not an optional extra. For professional contractors, it directly affects job-site safety, equipment performance, productivity and the quality of the finished floor.

The EVO36 has been developed to deliver the high airflow required for professional concrete grinding while remaining practical to operate, transport, manoeuvre and maintain. With adjustable triple-motor power, H-Class filtration and a continuous Longopac® bagging system, it is a machine we are genuinely proud to add to the Diamond Tool Warehouse range.

Built for Professional Concrete Grinding

Concrete grinding can generate a significant amount of fine dust, particularly during coating removal, aggressive surface preparation and the grinding of soft or highly abrasive concrete.

If a dust extractor cannot keep up with the grinder, dust may escape from the shroud and spread throughout the work area. Poor extraction can also allow dust to build up beneath the grinding head, potentially reducing tooling efficiency and making it more difficult to monitor the condition of the floor.

The Evotech EVO36 has been designed to deliver powerful and consistent dust extraction for compatible concrete grinders and floor-preparation equipment.

Its three high-performance bypass motors produce a combined maximum power of 3.6kW, delivering:

• 600m³/h maximum airflow
• 220mbar vacuum pressure
• Strong and consistent dust collection
• Adjustable extraction performance
• Professional dust control for demanding projects
• High airflow for compatible concrete grinders

The EVO36 is not simply a larger general-purpose vacuum. It is a purpose-built H-Class dust extractor created for professional concrete grinding and surface preparation.

Why Airflow Matters

An effective dust extractor requires the right combination of airflow and vacuum pressure.

Vacuum pressure provides the pulling force needed to move material through the extraction system. Airflow determines the volume of dust-laden air the machine can move over a given period.

Concrete floor grinders typically generate dust across a larger area than handheld power tools. They therefore require sufficient airflow to collect dust from beneath the grinding head and move it through the extraction hose.

With a maximum airflow rating of 600m³/h, the EVO36 is the highest-airflow model in the current Evotech Performance range. This makes it the preferred Evotech option for compatible concrete grinders and demanding floor-preparation applications.

The correct dust extractor must still be matched to the grinder, hose diameter, dust shroud, tooling and material being removed.

Adjustable Triple-Motor Performance

One of the EVO36’s most practical features is its adjustable triple-motor system.

The EVO36 is powered by three high-performance bypass motors, producing a combined maximum motor power of 3.6kW. Each motor has its own individual control switch, allowing the operator to run the dust extractor on one, two or all three motors.

With the flick of a switch, contractors can adjust the extraction performance according to the connected equipment and the amount of dust being generated.

• One motor: Suitable for lighter dust-extraction tasks and compatible handheld power tools.
• Two motors: Provides increased airflow for medium-duty grinding, polishing and surface-preparation work.
• Three motors: Delivers the EVO36’s maximum extraction performance for compatible concrete grinders and demanding dust-producing applications.

This individual motor control allows operators to use only the extraction capacity required for the job. There is no need to operate all three motors during lighter work, while maximum airflow remains immediately available for aggressive grinding, coating removal and larger floor-preparation projects.

Running one or two motors when full extraction performance is unnecessary may also help reduce power consumption, operating noise and unnecessary motor wear.

When all three motors are operating, the EVO36 delivers its maximum rated performance of:

• 3.6kW combined motor power
• 600m³/h airflow
• 220mbar vacuum pressure

Actual extraction performance when using one or two motors will depend on the connected equipment, hose arrangement, dust shroud, filter condition and job-site conditions.

Suitable Applications

The adjustable triple-motor system makes the EVO36 suitable for a wide range of professional applications, including:

• Concrete floor grinding
• Polished-concrete preparation
• Epoxy and coating removal
• Adhesive and tile-glue removal
• Surface profiling
• Concrete remediation
• Warehouse and factory floor preparation
• Commercial flooring projects
• Industrial surface preparation
• General dry construction-dust extraction

Subject to the connected machine’s requirements, the EVO36 may also be suitable for compatible floor saws, scarifiers, shot blasters and other surface-preparation equipment.

Always confirm the airflow and vacuum requirements of the connected machine before use.

H-Class Filtration for Hazardous Dust

Concrete and masonry work can generate hazardous fine dust, including respirable crystalline silica. This dust may be too fine to see clearly, but it can still present a serious health risk when inhaled.

The EVO36 features H-Class certified filtration for the controlled collection of hazardous dust generated during concrete and masonry work.

H-Class filtration is an important feature when choosing a professional concrete dust extractor, but filtration alone does not create a complete dust-control system. Effective dust management also requires:

• A properly fitted grinder or tool shroud
• Correctly sized extraction hoses and fittings
• Secure hose connections
• Regular filter inspection and maintenance
• Appropriate operating procedures
• Suitable personal protective equipment
• Compliance with applicable workplace safety requirements

The EVO36 has been developed to form a central part of a complete professional dust-management system.

Continuous Longopac® Dust Bagging

Collecting hazardous dust is only part of the process. Contractors must also consider how the collected material will be removed and disposed of.

Traditional collection containers and fixed dust bags can expose operators to dust during emptying and disposal. The EVO36 addresses this with a continuous Longopac® bagging system.

The Longopac liner allows the operator to pull down the required length of bag, seal the collected material and create a new bag section. This supports more controlled dust handling while reducing unnecessary interruptions.

Advantages of continuous Longopac bagging include:

• Reduced contact with collected dust
• Controlled containment during bag changes
• Bag sections sized to suit the volume collected
• Faster and cleaner waste handling
• Reduced downtime during larger projects
• Extended operation without emptying a conventional container
• Easier disposal of collected material

Suitable personal protective equipment and safe dust-handling procedures must still be used when sealing, removing and disposing of filled bags.

Designed for Australian Contractors

The Evotech Performance EVO36 was designed in Queensland for Australian conditions.

Professional concrete contractors need equipment capable of withstanding regular transport, demanding job sites and extended grinding projects. The EVO36 features heavy-duty industrial construction intended for regular professional use across residential, commercial and industrial environments.

It has been designed around the practical requirements of contractors, including extraction performance, motor control, transportation, servicing and dust disposal.

Height-Adjustable Handle for Easier Transport

Large dust extractors can be difficult to load into utes, vans and trailers, particularly when vehicle clearance is limited.

The EVO36 features a height-adjustable handle that allows the machine’s overall height to be reduced for loading, transport and storage. Once on site, the handle can be repositioned to make the extractor easier to manoeuvre around the work area.

It may appear to be a small detail, but contractors who regularly load and unload heavy equipment understand the value of practical transport features.

Easy-to-Service Filter System

A dust extractor can only perform correctly when its filtration system is properly inspected and maintained.

The EVO36 features an accessible filter system designed to simplify routine inspection and servicing. Easier access can help reduce maintenance time, improve filter care and keep the machine operating consistently.

The filter condition should be checked regularly, particularly during high-dust applications. A blocked or damaged filter can reduce airflow, compromise extraction performance and place unnecessary strain on the motors.

Comparing the EVO17, EVO24 and EVO36

The Evotech Performance range includes three H-Class dust extractors designed for different tools, machines and applications.

Model	Motor configuration	Airflow	Vacuum pressure	Recommended applications
EVO17	Single motor, 1.7kW	217m³/h	340mbar	Edge grinders, concrete saws, drills, wall chasers and handheld tools
EVO24	Twin motor, 2.4kW	400m³/h	220mbar	Smaller concrete grinders, polishers and floor-preparation machines
EVO36	Three individually controlled motors, 3.6kW	600m³/h	220mbar	Compatible concrete grinders and demanding commercial or industrial preparation

Evotech EVO17

The compact EVO17 delivers the highest vacuum pressure in the range. It is particularly well suited to edge grinders, concrete saws, core drills, wall chasers and other handheld power tools.

Evotech EVO24

The twin-motor EVO24 provides increased airflow for smaller concrete floor grinders, polishing machines and general surface-preparation equipment. It offers a practical balance between extraction performance, portability and manoeuvrability.

Evotech EVO36

The new EVO36 delivers the highest airflow in the range. Its three individually controlled motors allow contractors to adjust the extraction output to suit the job, from lighter dust collection through to demanding concrete grinding and coating removal.

There is no single dust extractor that is automatically best for every machine. The correct model depends on the equipment’s airflow requirements, the hose diameter, dust shroud design and intended application.

Diamond Tool Warehouse can help match the correct Evotech dust extractor to your grinder or power tool.

EVO36 Technical Specifications

Specification	EVO36 details
Motor configuration	Three bypass motors
Motor controls	Three individual switches
Operating options	One, two or three motors
Combined motor power	3.6kW
Maximum airflow	600m³/h
Vacuum pressure	220mbar
Filtration	H-Class
Dust collection	Continuous Longopac® bagging
Handle	Height-adjustable
Application	Dry use only
Design origin	Queensland, Australia

Why We Are Proud of the EVO36

At Diamond Tool Warehouse, we work with concrete grinding and floor-preparation equipment every day. We know contractors need more than impressive specifications on a product page. They need equipment that performs consistently on the floor, is practical to transport and helps them work more safely and efficiently.

We are proud of the EVO36 because it combines the features professional contractors need in one purpose-built machine:

• Adjustable one, two or three-motor operation
• High airflow for demanding concrete grinding
• H-Class certified filtration
• Continuous Longopac dust collection
• Heavy-duty professional construction
• Practical transport and storage features
• Accessible servicing
• A design developed for Australian working conditions

The EVO36 is an important addition to the Evotech Performance range and represents our commitment to supplying dependable professional equipment to the concrete flooring and surface-preparation industries.

Available Now from Diamond Tool Warehouse

The new Evotech Performance EVO36 H-Class Dust Extractor is available now from Diamond Tool Warehouse.

If you are unsure whether the EVO17, EVO24 or EVO36 is right for your equipment, contact our team. We can help you compare the models and select the appropriate dust extraction system for your grinder and application.

View the Evotech EVO36 H-Class Dust Extractor online or contact Diamond Tool Warehouse for more information.

An H-Class dust extractor is one component of a complete silica-dust management system. Always follow the equipment manufacturer’s instructions and applicable workplace health and safety requirements.