Services

Injection Testing EquipmentRochester Diesel, formerly Rochester Fuel Injection, has been servicing the diesel industry for the past 30 years. We are located at 6430 Highway 63 South in Rochester, MN just north of the airport. Over the past 30 years the diesel industry has grown with technology and Rochester Diesel has grown with the technology. The former industry of mechanical pumps and injectors is giving way to EUI (electronic unit injectors), common rail injection and an enhancement technique know as extrude honing. Rochester Diesel has made investments in new test benches and a hone machine to accommodate all of the advancements. Rochester Diesel has also built drive-in service bays to accommodate everything in size from Class 8 semis down to diesel lawn mowers and we work on all of it.

Electronic Unit Injectors

ISX Injector Testing

Rochester Diesel now has the ability to test Cummins ISX injectors. Our new Maktest bench can test mechanical ISX injectors. After testing the injector, we can provide a printed data sheet for each injector detailing whether the injector is functioning correctly or not. If it's not operating correctly we well be able to tell you why. After determining the functionality of your injector , we can provide you a manufactured injector or hone your nozzles for a performance application.

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Extrude Hone Kennametal Vector Tip Machine

Our extrude hone unit was specifically designed for the diesel industry. This is not a hone machine that has been “repurposed.”

Extrude Honing Process

Extrude honing is a process that takes an injector tip and forces a silly putty like material through the holes in the nozzle. The silly putty material, also known as media, has very fine grit in it. We can do a basic clean-up hone. This removes built up carbons and any imperfections in the nozzle. A clean up hone will produce injectors that smoke less at idle and burn fuel more cleanly.

Our Custom Hone Programs

Rochester Diesel also has custom hone programs that will produce mileage, horsepower and all out performance injectors. For honing prices please click here.  Depending on what the customer wants we use different media. There’s an extremely fine media for small nozzle and a larger grit media for larger nozzles.

The Kennametal Vector Tip hone machine will work on any and all makes of diesel injector tips. All injector tips in a set are honed to flow the same amount of fuel to within a 2% range. To guarantee this Rochester Diesel runs all honed nozzles through our custom built flow machine. Rochester Diesel’s flow machine flow tests injectors using calibration fluid instead of air (as recommended by Kennametal.) This produces proper and consistent operation when installed in the motor.

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Electronic Unit Injectors

Electronic Unit Injectors (EUI)

At Rochester Diesel our AVM-2PC test bench by Hartridge tests all of our EUI injectors including Cat, Detroit, Cummins, Volvo and John Deere. We are the only authorized shop in North America that uses OEM parts to rebuild you injectors so when you get you injector back it’s brand new from the inside out.

All of Rochester Diesel’s injector sets are flow matched. This means that all injectors in a set will flow the same amount of fuel within 2% of each other. This allows all of the injectors in a set to use the same trim code. A trim code is required to ensure your injectors all work together and your engine runs smoothly.

Because a rebuilt injector flows differently than prior to being rebuilt, reusing the trim code previously assigned to the injector does not work. We’ve seen it repeatedly. Customers that get their injectors rebuilt elsewhere, and do not a have a new trim code assigned, don’t gain anything and the engine doesn’t run any better.

We also use our AVM-2PC bench to rebuild EUP (electronic unit pumps) by Mack.

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Common Rail Injectors

Our Hartridge common rail test bench, known as a CRIPC, tests common rail injectors with shot-to-shot technology. This means that the test bench measures the quantity of fuel that goes through the injector each time the injector fires. This is important because with shot-to-shot technology you know specifically what the injector is doing and then the injector can be balanced. This ensures that each shot is equal producing a smooth running engine.

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Common Rail Injectors
Drive-In Services

Drive-In Services

Rochester Diesel has drive-in service bays to service a wide variety of diesel equipment. Our service bays are large enough to accommodate Class 8 semis and large Ag equipment. Rochester Diesel provides services for drivability issues, turbos, engine overhauls, air conditioning system repairs, DOT’s, transmission and clutch work. We also work on diesel lawn mowers, ATV’s and UTV’s.

If it has a diesel motor and is having issues we can fix it. We also offer on-site service of any and all diesel equipment. Please call us for details.

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Fuel Injection Test Equipment

Rochester Diesel (formerly Rochester Fuel Injection) is factory authorized to service diesel injection pumps and diesel injectors for the following manufacturers: AMBAC International, Bosch, Denso (Nippondenso), Delphi, Stanadyne (Roosa Master), Yanmar and Zexel.

We are also an authorized distributor for Alliant Power HEUI injectors.These are not aftermarket injectors but the OE injectors that were in the original Ford 7.3 Powerstroke, Navistar T444E, DT466 and DT530 engines when they came off of the assembly line. We can service these injectors or sell new.

If you don’t see your pump or injector listed please call our service department with any questions.

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Testing Equipment