ENGINE FAMILY SPECIFICATIONDENSO COMMON RAILTier 3 / Stage IIIA

John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H) Diesel Injector
Cross-Reference & Technical Specs

Authoritative technical specifications, verified Bosch part numbers, control valve stamping codes, nozzle spray orifices, and hold-down tightening torque for the John Deere PowerTech Plus 4.5L diesel engine family.

Primary OEMDENSO
Control ValvePlate
Nozzle CodeDLLA140P878
Peak Pressure1600 bar
Hold-Down Torque37 N·m
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All Verified Part Numbers for John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)

The following 2 common-rail injector assemblies are calibrated for this engine family. Click any SKU to view individual test bench flow curves, sister cross-references, and vehicle applications.

Part Number (SKU)Primary OE ReferenceControl ValveNozzle Code
RE529118, RE546776, SE501925PlateDLLA140P878
RE530362, RE531704, SE501926PlateDLLA140P878
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Verified Vehicle Compatibility

Make / ManufacturerVehicle Model & PlatformEngine SpecificationModel Years
John Deere6030 Series Tractors (6130 to 6930)John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)2006-2015
John Deere7030 Series Tractors (7130 to 7830)John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)2007-2014
John DeereS-Series Combines (S540, S550)John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)2011-2017
John DeereForestry Skidders & HarvestersJohn Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)2007-2016
John Deere6030 & 7030 Series Agricultural TractorsJohn Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)2007-2016
John DeereS-Series Rotary Combines (S540, S550)John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)2011-2018
John DeereSelf-Propelled High-Clearance Sprayers (4730, 4830)John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)2008-2017
John DeereWheeled Forestry Harvesters (1170E, 1270E)John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)2008-2016
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Installation, Tightening Torque & Re-torque Protocol

Strict torque compliance is mandatory on John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H) common-rail cylinder heads. Over-torquing stretches the injector body or strips the head clamping threads, while under-torquing allows combustion blow-by past the copper sealing washer:

🔧 Recommended Assembly Torques:
  • Hold-down clamp bolt: 37 N·m (cold state). Always clean the cylinder head recess with an injector seat reamer.
  • High-pressure rail flare nut: 25-30 N·m using a dedicated 17 mm line wrench.
  • Return leak-off banjo bolt: 9-12 N·m with fresh copper washers on both sides of the banjo union.
⚠️ ECU IMA Coding Requirement:

After fitting replacement injectors on John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H), generate or program the cylinder-specific IMA calibration code into the engine ECU using an OEM-level scan tool (Bosch KTS, Renault CLIP, or VAG-COM) to prevent cylinder power imbalance and rough idle.

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Technical Diagnostics FAQ for John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)

What DTC fault codes indicate a failing injector on John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H)?

The most frequent fault codes are P0201 through P0204 (Injector Circuit Malfunction on Cylinders 1-4), P2146/P2149 (Injector Group Supply Voltage Error), and P0087 (Fuel Rail Pressure Low due to excessive internal leak-off). Measure solenoid coil resistance across the pins (0.5-1.5 Ω) and perform a graduated-bottle dynamic leak-back test to pinpoint the leaking cylinder.

Can sister SKUs within the John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H) family be interchanged?

Not unless explicitly confirmed on the vehicle build plate. While sister SKUs share the same physical outer envelope and Plate control valve, they differ in nozzle spray orifice angle and factory IMA flow calibration. Mixing sister SKUs on the same engine block can trigger rough idle, elevated exhaust gas temperatures (EGT), and MOT emissions failure.

Which specific Bosch injectors fit the John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H) engine?

The verified genuine Bosch common-rail injectors engineered for the John Deere PowerTech Plus 4.5L / 6.8L (4045H / 6068H) engine family are: