When a radiator fails on a construction site, work stops. Excavators, bulldozers, cranes, and mining equipment all depend on a working cooling system to stay productive under load. A single overheating event can sideline a machine for days and in heavy-duty operations, that downtime adds up fast.
King Radiator HD Inc. has been repairing, rebuilding, and manufacturing heavy equipment radiators for over 57 years. We serve construction fleets, mining operations, and industrial operators across Canada. Every job is handled with precision diagnostics, proper pressure testing, and a turnaround time built around your schedule not ours.
From an excavator radiator leak on a job site in Ontario to a custom fabrication for discontinued mining equipment in Alberta, we handle it all.
57+ years of industrial and heavy equipment radiator experience
10,000+ radiators serviced across Canada
Canada-wide coverage construction, mining, agriculture, and industrial fleets
Industrial radiators are not just bigger versions of standard automotive units. They are built to handle conditions that would destroy an ordinary cooling system within weeks.
Heavy construction and mining equipment runs for long hours under extreme thermal load. The radiator core is larger, the tubes are thicker, and the materials are selected for vibration resistance and corrosion tolerance. Many units are custom-configured for the machine they are designed to cool.
That is why general radiator shops cannot reliably repair this type of equipment. Industrial cooling systems require specialized diagnostic tools, proper pressure testing equipment, and technicians who understand how these systems behave under load. A repair that does not restore original cooling performance puts the entire machine at risk.
We repair and rebuild radiators for a wide range of heavy equipment. If your machine is not on this list, call us and we will likely service it.
We perform Caterpillar radiator repair and rebuilds, Komatsu radiator service, John Deere radiator repair, Volvo Construction Equipment cooling system work, and Hitachi excavator radiator service across Canada. Our team is experienced with the specific cooling system configurations of each major brand.
The right choice depends on the condition of the unit and the availability of parts not on a default recommendation. Here is how we think about each option:
| Option | When It Applies | Typical Turnaround | Best For |
|---|---|---|---|
| Repair | Minor leaks, hose failure, small cracks in tanks or fins | Same day to 1 day | Early-stage issues caught before core damage sets in |
| Re-core / Rebuild | Core damage, internal corrosion, multiple leak points | 1 to 3 days | Units where tanks and frame are still structurally sound |
| Custom Fabrication | OEM parts unavailable, discontinued models, spec upgrades | 3 to 7 days | Older machines or high-demand applications needing custom specs |
| Full Replacement | Severe frame damage, cracked housing, repeated failure history | Fast if stocked | Units beyond practical restoration |
In most cases, repair or re-coring is the most practical solution. Full replacement is recommended only when the unit is beyond restoration or when repeated failures indicate a design mismatch for the application. Every recommendation we make comes with a written assessment before any work begins.
We follow a consistent five-step process on every industrial job. This ensures nothing is overlooked and every unit performs reliably when it returns to service.
We inspect the unit either at your location or inside our Mississauga facility. Our technicians check for leaks, corrosion, vibration damage, blocked cores, and coolant flow restrictions. We identify the root cause of failure before recommending a repair path.
We completely dismantle the radiator and clean it using industrial ultrasonic systems. This removes scale buildup, oil contamination, rust deposits, and mineral blockages that restrict coolant flow. Cleaning is essential before any accurate assessment of core damage can be made.
Depending on what the inspection reveals, we repair the existing core, install a replacement core, or fabricate a custom unit to the original specifications. All welding, sealing, and core work is done to meet or exceed OEM performance standards.
Every unit is pressure-tested before it leaves our facility. We test under conditions that simulate real working loads to confirm the repair holds under pressure. Any weak points identified during testing are addressed before the unit is released.
We support the reinstallation process and verify coolant flow, operating temperature, and overall system performance after the unit is back in service. We document all findings and provide a complete service record for your fleet files.
Emergency repairs are prioritized. If your equipment is down and costing you money, tell us when you call we will schedule accordingly.
An industrial radiator is a heavy-duty cooling unit designed for continuous operation under high heat and pressure. It uses larger cores, thicker tubes, and stronger materials than standard automotive radiators. It is built to handle vibration, extreme temperatures, and long daily operating hours. Standard radiators are lighter units designed for lower thermal loads and shorter daily run times.
Cost depends on the size of the unit, the extent of the damage, and whether repair, re-coring, or custom fabrication is required. Minor repairs on smaller units are the most affordable option. Full rebuilds on large mining or crane equipment involve more materials, more labour, and longer timelines. We provide a written quote after a full inspection — there are no guesses involved.
We service Caterpillar, Komatsu, John Deere, Volvo, Hitachi, Liebherr, Case, Bobcat, and JCB, among others. Our team handles Caterpillar radiator rebuilds, Komatsu radiator repair, and John Deere cooling system service across Canada. If your brand is not listed, contact us — we service most major industrial and construction equipment manufacturers.
At minimum, a heavy equipment radiator should be inspected once per year or after every 1,000 to 1,500 hours of operation — whichever comes first. Equipment operating in dusty, muddy, or extreme temperature environments may need inspection more frequently. Regular servicing catches blockages and corrosion early, before they cause a full cooling system failure on the job site.
The most common causes are blocked cores from dust and debris, internal corrosion from contaminated or degraded coolant, vibration fatigue that weakens joints and seals over time, and thermal cycling that gradually deteriorates tank materials. Machines that run long hours without regular coolant changes are at the highest risk of premature radiator failure.
Yes. We fabricate custom industrial radiators when OEM parts are unavailable, when a machine has been modified beyond standard specs, or when a performance upgrade is required. We build to your exact specifications — core size, tube configuration, material type, and mounting dimensions. All custom units are pressure-tested before delivery.
In many cases, yes. Overheating damage is assessed on a case-by-case basis. If the core is intact and the tank structure is sound, repair or re-coring is often viable. If the overheating event caused warping, cracking, or significant internal contamination, a rebuild or full replacement may be necessary. We assess every unit before recommending a direction.
Yes. We offer 24 to 72 hour emergency turnaround for industrial and construction equipment that is actively down. When you contact us, let us know your equipment is creating active downtime and we will prioritize your job. We serve fleets across Canada including Ontario, Alberta, British Columbia, and Saskatchewan.
Cooling system failure is one of the most disruptive problems on any job site. The longer equipment sits, the more it costs in lost productivity, delayed contracts, and pressure on the rest of your fleet.
King Radiator HD Inc. provides fast, reliable industrial radiator repair, rebuild, and custom manufacturing for construction and industrial fleets across Canada. We assess every unit before we quote, and we do not recommend replacement unless it is truly the right answer.
