
Why Choose Donaldson Filters? The Premium Choice for Engine and Machinery Protection
Why Choose Donaldson Filters for Engine Protection? At John Ratcliffe, we understand that the reliability of your machinery depends on the quality of its filtration systems. That’s why we proudly stock and supply Donaldson Filters—the industry’s gold standard in filtration technology.
Why choose Donaldson? One Trusted Brand. One Complete Solution.
Donaldson is your Single Filtration Source, delivering a full range of high-performance filters designed to extend engine life, increase operational efficiency, and minimise costly downtime across various applications.
Donaldson Air Filters: Power Starts with Clean Air
Donaldson air filters are engineered with advanced filtration technology that captures harmful particles before they reach your engine. Designed for a wide range of vehicles and equipment, these filters enhance performance and prolong engine life.
Donaldson Air Dryers: Dry Air = Safe Brakes
Moisture, oil vapour, and contaminants can seriously damage brake and suspension systems. Donaldson air dryers remove these threats before they reach air tanks and valves, ensuring safer, longer-lasting performance.
Donaldson Air-Oil Separators: Cleaner Compressed Air
Donaldson air-oil separators efficiently remove oil mist from compressed air. This not only protects your equipment but also reduces pressure drop and maintains maximum airflow—perfect for industrial systems.
Donaldson Cabin Air Filters: Breathe Easy
Protect your operators with Donaldson cabin air filters, which remove dust, allergens, and other irritants before they enter the cabin. Clean air means healthier, more comfortable working conditions.


Donaldson Lube Filters: Maximise Engine Longevity
Donaldson lube filters are designed to capture even the smallest contaminants that can cause catastrophic engine failure. Keep your engine running smoother and longer with the best in oil filtration.
Donaldson Fuel Filters: Protect What Powers You
Dirty fuel can destroy injectors and diesel pumps. Donaldson fuel filters provide a first line of defence, safeguarding critical components and helping your engines perform at their best.
Donaldson Coolant Filters: Keep Your Cool
Donaldson coolant filters maintain optimal engine temperatures and reduce wear by removing scale and debris. Choose from a range of efficiency ratings and media types to match your system.
Donaldson Hydraulic Filters: Protect Your Investment
Donaldson’s range of hydraulic filters protects expensive hydraulic components from damaging contaminants. Ideal for use in construction, mining, and industrial applications.
Donaldson Transmission Filters: Tailored to Every Need
Whether you need low-, mid-, or high-pressure solutions, Donaldson offers transmission filters in various styles to meet virtually any system specification.
Why Donaldson? Why John Ratcliffe?
✔ Global Reputation – Donaldson has over 100 years of innovation in filtration
✔ OEM Quality – Trusted by top manufacturers around the world
✔ Local Support – Available directly from John Ratcliffe, your trusted distributor
✔ End-to-End Expertise – We help you select, install, and maintain the right filter solutions
Order Donaldson Filters Today
Ready to enhance your engine’s performance and reliability? Contact John Ratcliffe today to find the ideal Donaldson Filtration solution for your vehicle or machinery. We’ll help you protect your investment—every filter, every time.
Contact us: enquiries@johnratcliffe.co.za | +27(11) 953 3900
Visit us in-store: 74 Commissioner Street Krugersdorp