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HMM Diesel Fleet Service and Hydraulics

We specialize in all your diesel needs from light to heavy duty trucks.

Hmm Diesel Fleet Service and Hydraulics is a locally owned family business with decades of experience.

We also service heavy equipment, agricultural equipment and provide 24/7 mobile hydraulic hose repair and fleet servicing.

At Hmm Diesel Fleet Services and Hydraulics we are committed to providing a stress-free experience to every customer interaction.

At Hmm Diesel Fleet Services we offer wide variety of services from Diagnostic Scans, DPF Cleaning, Full Engine Over-Hauls, Brakes, Lights, Battery Replacement, Hydraulic Cylinders, motors and pumps repair. Basically, we have you covered from bumper to bumper.

We offer a 24/7 Roadside/Onsite Service with 12V and 24V Jump starts on demand

We are the BOA Hydraulics agents for the Waikato and offer prompt hose services to the Waikato and its environs,
We can also go much further afield at the behest of the company or customer in need.

With our BOApod we can combine your hydraulic hose work with your machine servicing, onsite or in our workshop.

With Preventative Maintenance on Your Hoses You Can Avoid:

  • Potential downtime of your machines, and extra hours to catch up
  • Premature failure of the hoses, potentially affect other parts of the machine
  • Unbudgeted expenses from out sourced repairers
  • Excessive loss of hydraulic oil, impacting the environment

Service Your Whole Machine Including Hydraulic Hose Repair and Maintenance. Our mobile unit means we can come to you and provide a contamination free hydraulic hose assembly environment.

We run a well-stocked hydraulic hoses BOA pod and can make up new or fix your hoses either onsite or come out to you.

BOA Pod Diesel Repairs & Maintenance

Regardless what time of day or night you can count on Hmm Diesel Fleet Services’ mobile mechanics to come to your aid – whether your truck or machinery is in trouble due to a mechanical or electrical fault. In the past we’ve helped customers with trucks or machinery that fail to start, overheated engines, drivetrain issues, hydraulic hoses, pneumatics etc...

Regular truck and machinery service ensures your vehicle is safe to drive on the road and easily passes every COF. From a basic service to a fully personalised service, our mechanics, auto electricians, and auto air refrigeration technicians assure that your vehicle will be in top form to run smoothly and fuel-efficiently on the road.

Truck and machinery services are available from one to an entire fleet of vehicles. Regular plant servicing can prevent potential vehicle problems from occurring in the future and can reduce the risk of a breakdown on the job.


Using the very latest automotive technology and employing a team of highly experienced and qualified mechanics, the team will have you and your vehicle back on the road in no time.
Our 24-hour breakdown service at Hmm DFS provides owner operators, fleets and drivers instant access to emergency road-side assistance for trucks, trailers and motorhomes throughout the Waikato region and surrounding areas.

We know that down time can be costly, so getting you back on the road in a timely fashion is one of our top priorities, along with quality repairs. Whether it is your truck, or forestry or earth moving machine, we have the skills to repair and maintain your assets.

In case of a breakdown or any other unexpected situation we offer all the assistance needed to get your truck back on the road with minimum delay.

You can call a tow truck to take you to the nearest mechanic, but that could take hours. What if we tell you that you can skip the wait, the worry, and the expense of getting a truck to tow your vehicle away? What if you could easily have a mechanic come to you and fix your car as soon as possible?

  • Fleet Servicing – full-service maintenance, petrol and diesel repairs, brakes and clutches
  • Mobile breakdown services for emergencies in the Waikato and surrounding area including diesel trucks, onsite fleet repair and servicing.
  • Reliable diagnosis of all types of vehicles, such as cars, vans, and light, medium and heavy duty trucks.

Our team work together to offer professional support to all clients, big and small, in trucking, earth moving, forestry and drilling.

Why Choose Us?

​With our years of experience across a range of fields there aren't many mechanical issues we can't resolve.
We understand the frustrations and costly time delay of equipment failure when you're in the middle of a job
One quick call and we're there to help.

We come to you. Available 7 days a week for breakdowns.

We understand your business and how important it is to keep the job on track and on budget.

That's why we offer a fast call out response to provide reliable onsite servicing on trucks, loaders, diggers, bobcats, mobile plant, fixed plant and more. Our team will get your equipment working again, saving you time and money.

Mobile Diesel Mechanics
Our extensive experience enables us to diagnose and repair faults in pneumatic, hydraulic, engine and auto electrical systems efficiently and effectively.
Regular servicing stops small problems from developing into major hassles and expenses.
Don’t let a breakdown mess with your business!

Truck and Trailer Operators.

Keep your operator rating top notch by carrying out pre COF checks
Failed a COF?
Call us for the repairs and servicing.

If you are looking for a reliable, trustworthy, and efficient mechanical contractor, look no further than Hmm DFS. Whether you need help on a small project or a larger job, we want to take the load off your shoulders by providing our specialised heavy diesel mechanical services. Just get in touch and let us know what you need. Servicing, breakdowns, jobs big or small, we have a solution for you.

Even with your own mechanics you can get bogged down with machinery and COF repairs.
Call us to relieve the pressure, there when you need us and gone when you don’t