JT Diesel and Maintenance

About Us

We come to you for hassle‑free service book ahead or call anytime when you need us. We come to you for hassle‑free service book ahead or call anytime when you need us.
We come to you for hassle‑free service book ahead or call anytime when you need us. We come to you for hassle‑free service book ahead or call anytime when you need us.

We are a dedicated mobile field service team specialising in the maintenance, repair, and support of heavy machinery and drilling equipment across mining, civil, and industrial environments. Operating fully mobile, we bring our expertise directly to your site — delivering reliable on-site servicing, rapid breakdown response, and preventative maintenance that keeps your equipment working where it matters most.

Our technicians are highly skilled in managing complex mechanical, hydraulic, and diagnostic systems in the field. With a strong understanding of high-pressure worksites and demanding operating conditions, we focus on fast turnaround times, safe work practices, and dependable results — even in remote or harsh environments.

From scheduled servicing and component replacements to urgent breakdown repairs and fault diagnostics, we provide end-to-end support tailored to heavy-duty operations. Everything we do is driven by a simple goal: maximise uptime, extend the life of your equipment, and keep your projects moving without unnecessary downtime.

Complete Onsite Servicing and Fleet Maintenance Plans

Our Services

JT Diesel & Maintenance is a locally owned mobile diesel fitting business specialising in on-site field servicing, maintenance, and breakdown support across mining, quarrying, civil, and heavy earthmoving operations. We operate with multiple fully equipped service vehicles, allowing us to respond efficiently and work directly at your site — reducing downtime and keeping machinery operating where it earns its keep.

The business is led by Jaimie Madden, a qualified diesel fitter with 7 years of mining industry experience. Jaimie has worked extensively in surface mining and heavy equipment environments, with a strong background in blast hole drill maintenance, including top hammer and rotary drills, along with ancillary equipment, dozers, excavators, and heavy earthmoving machinery commonly found in both mining and quarry operations.

This experience translates directly into the quarry and civil space, where equipment reliability, preventative maintenance, and fast response times are critical to daily production. JT Diesel & Maintenance brings a practical, hands-on approach built around real-world operating conditions — not workshop theory.

Supporting the business is Tanechka McAleese, who manages administration and client communications. Tanechka ensures bookings, scheduling, and invoicing are handled efficiently, allowing jobs to run smoothly from first contact through to completion.

At JT Diesel & Maintenance, we pride ourselves on honest workmanship, clear communication, and dependable field service. Whether you’re operating a mine, quarry, or civil project, we provide reliable mobile diesel support you can trust.

On-site Servicing

Fully equipped field service mechanics for all truck makes and models. We handle breakdowns, servicing, and maintenance on‑site to keep your fleet moving.
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Drill Support

Reliable on‑site drill support to keep your operations running smoothly and safely.
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Earthmoving and Heavy Machinery

Reliable servicing and repairs for drills, earthmovers, and heavy machinery to keep your equipment working at full strength.
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Fleet Maintenance

Keeping your fleet running reliably with scheduled servicing, diagnostics, and fast repairs.
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Pre-Purchase Inspections

Detailed pre‑purchase inspections to help you buy with confidence and avoid costly surprises.
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Why Choose JT Diesel & Maintenance

  1. Field Service Specialists
    We focus exclusively on on-site servicing and repairs, minimising downtime and eliminating unnecessary machine transport.


2. Mining & Quarry Experience
Real experience working on blast hole drills, heavy earthmoving equipment, and quarry plant — not guesswork.


3. Preventative Maintenance Focused
We don’t just fix breakdowns. We help prevent them through thorough inspections and proactive servicing.


4. Reliable & Responsive
Fast turnaround, clear communication, and realistic timeframes — no disappearing acts.


5. Safety Driven
Mining-standard safety awareness and work practices carried into every job, regardless of site size.


6. Straightforward Service
No upselling, no fluff. Just honest advice and quality workmanship