Our Services

As a team of multi skills engineers, we offer a wide range of services covering most aspects of machine repairs and servicing. This offers support to the plastic manufacturing and recycling industries.

To give us a brief background on our engineers, each one of our team have decades of experience. This experience involves industry training and even on the job experience, spanning years. We look to use our expertise to get the very most out of your industry machinery.

There are a range of different maintenance, repairs and installation services we can carry out. Below are a list of our most predominant services, which can be used to massively help your machinery equipment. In short, GM Diagnostics is the place to be for any heavy equipment services


The services we provide include:

GM Diagnostics: Our Services

If you are interested in any of the engineering services we provide, or you would like to speak about a job, why not get in touch with one of our team today?

Our team are all Safe Contractor approved, not to mention we’re also an approved partner with Plastikcity. We make sure that any of the work we carry out is only to the highest of standards.

We are flexible with our working processes. If your equipment isn’t able to be moved out of your warehouse, our team of diagnostics engineers are able to come to you. 

Contact Us

We’re available over the phone on 01204 650438/07791236176 or alternatively you can fill out the contact form on our Contact Us page!


Comprehensive Engineering Solutions

At GM Diagnostics, we understand that businesses today require comprehensive engineering solutions to stay competitive in the ever-evolving technological landscape. Our commitment to excellence drives us to offer a wide range of services encompassing every stage of the engineering process. From initial concept development to final product realisation, our dedicated professionals work closely with clients to deliver customised solutions that address their unique requirements.

We utilise advanced tools and technologies to ensure accuracy, efficiency, and cost-effectiveness throughout the engineering journey. With our comprehensive engineering solutions, you can trust GM Diagnostics to be your trusted partner in overcoming complex engineering challenges and achieving success in your projects.

Our Engineering Expertise

With a proven track record in delivering successful engineering projects, we take pride in our multidisciplinary expertise. Our team comprises mechanical engineers, electrical engineers, and other specialists collaborating seamlessly to provide solutions for the manufacturing and recycling industry. From concept to completion, we apply cutting-edge tools and technologies to ensure the highest standards of quality and efficiency in every project.

One key aspect that sets us apart is our commitment to staying at the forefront of technological advancements. We continuously invest in research and development, keeping up with emerging trends and breakthroughs in engineering. This proactive approach enables us to incorporate the latest advances into our projects, maximising efficiency and ensuring our clients benefit from cutting-edge solutions.

Performance Optimisation

Our engineering expertise extends to the performance optimisation of existing products or systems. Through detailed analysis and simulation, we identify areas for improvement and implement enhancements to optimise efficiency, reliability, and cost-effectiveness. Our goal is to help you achieve optimal performance while reducing operational expenses. Therefore, leading to enhanced customer satisfaction and a competitive edge in the market.

Compliance and SafeContractor Approved

Did you know we are SafeContractor Approved? Read More about Our Accreditation

Navigating complex regulatory requirements can be challenging. Our engineering services include compliance assessment and assistance with obtaining necessary certifications and approvals. We stay current with industry standards and regulations, ensuring that your products meet all relevant criteria and are ready for market entry.

Navigating the intricate landscape of regulatory requirements can pose significant challenges, but our engineering services excel in providing comprehensive solutions. We offer expert compliance assessment and dedicated support in acquiring essential certifications and approvals, leveraging our up-to-date knowledge of industry standards and regulations. With our assistance, your products will meet all the necessary criteria, enabling a seamless market entry experience.

Range of Engineering Services

Cyclones and Ducting

Your commercial ductwork is essential to having a safe and productive workplace. Our full range of Cyclones and Ducting can be manufactured in various materials, utilising either mild, galvanised or stainless steel. Therefore, it can be provided either free-standing or incorporating additional support steelwork. Depending on the site requirements, they can be supplied with additional after-filtration or exhaust fans… Read More about Cyclones and Ducting

Extensive Workshop Facility Including Blade Sharpening

Although we don’t manufacture blades, we offer a comprehensive in-house blade sharpening facility at GM Diagnostics. This allows us to sharpen and regrind all of our client’s granulator blades ready for reuse. What’s more, our re-sharpening and re-conditioning service has a fast and effective turnaround. We ensure you can get on with your commitments with as little disruption as possible… Read More about Extensive Workshop Facility Including Blade Sharpening

Granulator Service & Repair

Our Bolton engineers are able to carry out services and repairs on industrial granulators. These industrial machines are found either in recycling sites or plastic part manufacturing facilities that recycle their own scrap for reuse. If you keep your machinery well maintained and serviced, you prolong their life and, in turn, your productivity… Read More about Granulator Service & Repair

Granulator Blade Changes

Granulators are widely used in the plastics industry to reduce plastic waste into smaller, more manageable pieces. These machines employ rotating blades to cut and shred plastic materials, making them ready for further processing or recycling… Read More about Granulator Blade Changes

Granulator & Shedder Screens

General Maintenance & Diagnostics Ltd, supply an extensive range of different granulator and shredder screens. Most industrial and granulator screens are manufactured from mild steel to keep costs down. Whereas turbo drier screens are made from stainless steel. However, when extended wear is required, we can produce through-hardened screens in various grades of Chrome-Boron steel. & wear plate steel grades… Read More about Granulator & Shedder Screens

Industrial Machinery Repairs & Servicing

Our diagnostics engineers are on hand to ensure the longevity and safety of all of your equipment through our industrial machinery repairs and servicing. We are proud to offer excellent services that are carried out by our highly experienced industry standard engineers. In regards to heavy machinery, we believe it is extremely important to regularly manage maintenance. This is to improve safety and quality conditions for everyone… Read More about Industrial Machinery Repairs & Servicing

Injection Moulding Technical Support

Injection moulding is a widely used manufacturing process that involves the production of complex plastic components. With over 38 years of experience in the injection moulding industry, we have a vast knowledge to call upon for Injection Moulding Technical Support. With vast experience working on machines starting from 15 tonne going up to 3000 tonne, no machine is too big… Read More about Injection Moulding Technical Support

Machine Installations

How well large machines are installed is vitally important to your business! It’s a key part of putting the machinery into service. Here at GM Diagnostics, we are able to carry out the positioning and installation of most types of equipment. Such as  injection moulding machines, extrusion lines incl. all down stream equipment, granulators and shredders. All our engineers are RTITB fork truck trained as well as IPAF… Read More about Machine Installations

Material Blower Fans

GM Diagnostics is your premier destination for supplying and repairing material blower fans in Bolton. We are committed to providing top-notch products and reliable repair services in order to meet your ventilation needs. Whether you require new fans for your industrial facility or need to repair and maintain existing ones. The GM Diagnostics team of experts are here to assist you… Read More about Material Blower Fans

On Site Hard Face Welding

On-site hard face welding is a type of welding technique that is used to repair and build up worn parts. More specifically to parts in machinery, equipment, and other components. It involves the application of a layer of hard metal or alloy onto the surface of a worn part. It serves to increase its hardness, strength, and resistance to wear and tear… Read More about On Site Hard Face Welding

Pipe Fitting for Compressed Air & Cooling Water

Our skilled engineers carry out pipe fitting up to 3 inches bsp whether it’s for compressed air or for chilled water systems,  in Plastics Injection Moulding, Extrusion, Blow Moulding or Recycling Facilities. We can work to customer supplied layout drawings or provide installations based on customers rough description of what they need… Read More about Pipe Fitting For Compressed Air & Cooling Water

Shredder Services & Repairs

Our expert services are designed to meet your requirements. Whether you’re looking for a repair on large scale granulators and shredders on site or personal machinery, we provide a service convenient to you. Our site is equipped with all the specialist tools that’s required for working on heavy duty industrial machinery… Read More about Shredder Services & Repairs

Thermal Image Survey

The thermal image camera is a valuable tool when it comes to predictive and preventative maintenance. It performs the function of visually representing surface temperatures, thus helping carry out a thermal image survey to discover thermal discrepancies. The camera highlights differences in temperatures and can identify problems that include… Read More about Thermal Image Survey

Tie Bar Installation & Strain Gauge

When it comes to diagnosing and troubleshooting issues, it is crucial to have a comprehensive understanding of various components. This page provides valuable insights into our tie bar installation & strain gauge services. By exploring these topics, our engineers can fix your tie bar & strain gauge issues… Read More about Tie Bar Installation & Strain Gauge

Industries Served

Our engineering services cater to a wide range of industries, including but not limited to:

  • Automotive
  • Aerospace
  • Energy and Utilities
  • Manufacturing
  • Medical Devices
  • Consumer Electronics
  • Industrial Equipment

Contact General Maintenance & Diagnostics: Engineering Services, Today!

When it comes to reliable and efficient engineering services, trust GM Diagnostics to be your strategic partner. Contact us today to discuss your engineering requirements and learn how our expertise can drive the success of your projects.