1996–2002 John Deere PowerTech 4.5L & 6.8L Diesel Engines – Base Engine Technical Manual (P/N CTM104)
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John Deere Models Covered & Key Technical Specifications
Models & Model Codes: PowerTech 4.5 L Diesel Engines (4045), PowerTech 6.8 L Diesel Engines (6068)
Sub-models / Variants: Base Engine, Non-Certified, Tier I, Tier II, Naturally Aspirated (4.5 L: CD4045DF120, CD4045DF150, CD4045DF151, CD4045DF152, CD4045DF153, CD4045DF154, CD4045DF157, CD4045DF158, CD4045DL050, CD4045DL070, CD4045DLV50, CD4045DYC50, J04045DCQ01, PE4045DF150, PE4045DKV50, PE4045DKV51, PE4045DLV50, PE4045DLV51, PE4045DP050, PE4045DP051, PE4045DP052, PE4045DP053, PE4045DT050, PE4045DT056, PE4045DT057, PE4045DT058, T04045DF120, T04045DF150, T04045DF151, T04045DF152, T04045DF153, T04045DFM50, T04045DT050, T04045DT052, T04045DT055, T04045DT056, T04045DT057, T04045DT058; 6.8 L: CD6068DF150, CD6068DL050, CD6068DL051, CD6068DL070, CD6068DL071, PE6068DF150, PE6068DT850, T06068DF150), Turbocharged without Aftercooling (4.5 L: CD4045TAT50, CD4045TF120, CD4045TF150, CD4045TF152, CD4045TF154, CD4045TF155, CD4045TF157, CD4045TF158, CD4045TF161, CD4045TF162, CD4045TF220, CD4045TF250, CD4045TF251, CD4045TF253, CD4045TF257, CD4045TF258, CD4045TF275, CD4045TL050, CD4045TL051, CD4045TL052, CD4045TL053, CD4045TL054, CD4045TL055, CD4045TL056, CD4045TL057, CD4045TL058, CD4045TL059, CD4045TL060, CD4045TL061, CD4045TL062, CD4045TL063, CD4045TL064, CD4045TL070, CD4045TL071, CD4045TL072, CD4045TL073, CD4045TL075, CD4045TLA50, CD4045TLA51, CD4045TLV50, CD4045TYC50, CD4045TZ060, CD4045TZ250, J04045TCQ01, PE4045TE051, PE4045TF120, PE4045TF150, PE4045TF151, PE4045TF220, PE4045TF250, PE4045TF275, PE4045TKV50, PE4045TLV50, PE4045TLV51, PE4045TN050, PE4045TP050, PE4045TP051, PE4045TP052, PE4045TP053, PE4045TP054, PE4045TP055, PE4045TP056, PE4045TP057, PE4045TP059, PE4045TP060, PE4045TT050, PE4045TT058, PE4045TT084, PE4045TT085, PE4045TT086, PE4045TT087, PE4045TT088, PE4045TT089, T04045TDW50, T04045TE050, T04045TE051, T04045TF120, T04045TF150, T04045TF151, T04045TF152, T04045TF220, T04045TF250, T04045TF251, T04045TFM50, T04045TN050, T04045TT050, T04045TT052, T04045TT053, T04045TT054, T04045TT055, T04045TT056, T04045TT057, T04045TT058, T04045TT060, T04045TT061, T04045TT062, T04045TT063, T04045TT064, T04045TT065, T04045TT066, T04045TT067, T04045TT068, T04045TT069, T04045TT070, T04045TT080, T04045TT081, T04045TT082, T04045TT083, T04045TT084, T04045TT085, T04045TT086, T04045TT087, T04045TT088, T04045TT089, T04045TT091, T04045TT801, T04045TT850; 6.8 L: CD6068TCQ50, CD6068TF150, CD6068TF151, CD6068TF152, CD6068TF157, CD6068TF158, CD6068TF159, CD6068TF220, CD6068TF250, CD6068TF251, CD6068TF257, CD6068TF258, CD6068TF275, CD6068TL050, CD6068TL051, CD6068TL052, CD6068TL053, CD6068TL054, CD6068TL071, CD6068TLA50, CD6068TLA51, CD6068TLA52, CD6068TLA53, CD6068TP051, CD6068TP052, CD6068TYC50, CD6068TYC51, J06068TCQ04, J06068TCQ07, J06068TCQ08, PE6068TE050, PE6068TF120, PE6068TF150, PE6068TF220, PE6068TF250, PE6068TF275, PE6068TN050, PE6068TN051, PE6068TN052, PE6068TN053, PE6068TP051, PE6068TP052, PE6068TP053, PE6068TP054, PE6068TRW52, PE6068TRW72, PE6068TRW73, PE6068TT051, PE6068TT053, PE6068TT057, PE6068TT058, PE6068TT059, PE6068TT850, PE6068TT851, PE6068TTJ50, T06068TDW50, T06068TDW51, T06068TDW52, T06068TDW53, T06068TDW54, T06068TDW55, T06068TDW56, T06068TDW57, T06068TE050, T06068TF120, T06068TF150, T06068TF151, T06068TF220, T06068TF250, T06068TFM50, T06068TN050, T06068TN051, T06068TN053, T06068TRW52, T06068TRW72, T06068TT050, T06068TT051, T06068TT052, T06068TT053, T06068TT055, T06068TT056, T06068TT057), Air-to-Air Aftercooled (4.5 L: CD4045HF120, CD4045HF150, CD4045HF152, CD4045HF157, CD4045HF158, CD4045HF275, CD4045HL070, CD4045HL071, CD4045HL072, CD4045HL073, CD4045HLA70, CD4045HLA71, CD4045HLA72, CD4045HLA73, CD4045HZ050, PE4045HF120, PE4045HF150, PE4045HF275, PE4045HP050, PE4045HP051, T04045HDW50, T04045HDW51, T04045HF120, T04045HF150; 6.8 L: CD6068HCQ60, CD6068HCQ61, CD6068HF120, CD6068HF150, CD6068HF157, CD6068HF158, CD6068HF250, CD6068HF275, CD6068HLA70, CD6068HLA71, CD6068HLA72, CD6068HLA73, CD6068HZ050, CD6068HZ060, PE6068HF120, PE6068HF150, PE6068HF250, PE6068HF275, PE6068HT050, PE6068HT053, PE6068HT054, PE6068HT055, PE6068HT056, PE6068HT057, T06068HDW50, T06068HDW52, T06068HDW53, T06068HDW55, T06068HDW58, T06068HDW70, T06068HF120, T06068HF150, T06068HF250, T06068HH050, T06068HH051, T06068HH052, T06068HT050, T06068HT052), Air-to-Coolant Aftercooled (6.8 L: J06068ACQ01). Base engine configurations with Mechanical Fuel Systems, Level 1 Electronic Fuel Systems (Delphi/Lucas DP201), Level 4 Electronic Fuel Systems (Bosch VP44), and Level 12 Electronic Fuel Systems (Stanadyne DE10); fuel-system repair and diagnostics are covered in separate companion manuals. Additional 6.8 L tractor engine applications: 7210 SyncroPlus (T06068TRW53), 7410 SyncroPlus (T06068TRW54), 7210 PowerQuad (T06068TRW50, PE6068TRW50), 7410 PowerQuad (T06068TRW51, PE6068TRW51), 7510 PowerQuad (T06068TRW70, PE6068TRW70). These application identifiers describe base-engine installations, not complete machine or transmission repair coverage.
Model Years: 1996–2002 (1996, 1997, 1998, 1999, 2000, 2001, 2002)
Serial Numbers: Component-specific production breaks: PRECISION JOINT connecting rods—Dubuque 4.5 L (793938—), Dubuque 6.8 L (794055—); Saran RE500002 rods (554036—), RE500608 rods (553937—); Torreon RE500002 rods (039708—), RE500608 rods (036628—). Four-cylinder balancer shafts—earlier Dubuque shaft illustrated (—700876); removable weights on Dubuque engines (700877—), Saran engines (500212—), and Torreon engines (001000—). Front-plate fasteners—earlier Dubuque engines (—703904) and Saran engines (—516217); later timing-cover studs on Dubuque engines (703905—), Saran engines (516218—), and Torreon engines (001000—). Saran coolant-gallery plugs—steel (—540458), composite (540459—). Saran 6010/6020 tractor engine dipstick/tube versions—R136162 tube with AT21535 dipstick (—550948CD), R501178 tube with RE502740 dipstick (550949CD—); some later engines retain the earlier tube with a spacer. Machine serial breaks in the engine application charts: 540/548G Skidder (558205—); 640G/648G Skidder (558325—); 690E LC Excavator (559603—); 450GTC Series IV Crawler Dozer, 455G Series IV Crawler Loader, 550G Crawler Dozer, 550GTC Crawler Dozer, and 555G Crawler Loader (each 840461—); 710D Backhoe Loader (—834729) and (834730—); 750C Crawler Dozer (831372—). These are component and application breaks, not one continuous serial-number range for the manual.
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Intake valve clearance (cold, checking range): 0.31–0.38 mm
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Exhaust valve clearance (cold, checking range): 0.41–0.48 mm
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Cylinder head cap screw final tightening: Additional 60° ± 10° torque-turn after the specified staged tightening and torque verification
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Piston height (from pin bore center): 71.64–71.70 mm
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Piston skirt diameter (28 mm from piston bottom, perpendicular to pin bore): 106.38–106.40 mm
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Crankshaft rod journal diameter: 77.800–77.826 mm
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Cylinder liner height above block: 0.030–0.100 mm
John Deere Manual Features & Content Preview
John Deere publication CTM104, dated 22JAN02, covers the 1996–2002 PowerTech 4.5L and 6.8L diesel base engines used in agricultural, construction, forestry, and OEM applications. It addresses non-certified, Tier I, and Tier II configurations.
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Cylinder head and valves: Head removal, rocker-shaft service, valve and seat grinding, guide reconditioning, gasket inspection, and valve-clearance adjustment.
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Block and rotating assembly: Piston and liner replacement, connecting-rod inspection, crankshaft and main-bearing service, flywheel work, and seal replacement.
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Camshaft and timing gears: Camshaft inspection, bushing replacement, gear backlash checks, and balancer-shaft installation and timing on equipped four-cylinder engines.
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Lubrication and cooling: Oil-pump overhaul, oil-cooler inspection, pressure-regulating valve service, coolant-pump rebuilding, thermostat testing, and cooling-system deaeration.
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Engine diagnostics: Compression, cranking-speed, oil-pressure, blow-by, and turbocharger tests, supported by lubrication and cooling-system troubleshooting charts.
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Starting and charging: Starter and alternator removal and installation; internal repair and testing belong to a separate publication.
This manual is written for experienced technicians and identifies the essential tools required for the documented service work.
Base Engine Coverage and Separate Service Volumes
Fuel-system repair, operation, and diagnostics are assigned to separate manuals: CTM207 for mechanical systems; CTM284 for Level 1 Delphi/Lucas DP201; CTM170 for Level 4 Bosch VP44; and CTM331 for Level 12 Stanadyne DE10 systems. These companion volumes are not included.
Starter and alternator repair and testing require CTM77. Machine-specific engine removal, installation, and access procedures belong to the machine technical manual, as do air-to-air aftercooler removal and inspection.
Engine Rebuild and Component Differences
Cylinder-head work includes valve-guide knurling, valve-seat insert replacement, head-flatness checks, and head-gasket failure inspection. Guide reconditioning and seat grinding require experienced personnel and suitable machining equipment.
The block section covers liner deglazing, piston-ring groove inspection, piston-pin bushings, and liner packing. It distinguishes early tongue-and-groove connecting rods from later PRECISION JOINT rods and provides production-location-specific serial breaks.
Crankshaft service includes front and rear wear sleeves, thrust-bearing inspection, flywheel checks, and the timing wheel used with VP44 or DE10 injection pumps. The camshaft and balancer-shaft procedures include bushing inspection and timing-gear assembly.
The manual warns that reversing the original left/right balancer-shaft positions can cause premature shaft and bushing wear. Follow the documented lifting, repair-stand, and electrical-isolation precautions when servicing the engine.
Lubrication, Cooling, and Turbocharger Fault Finding
Lubrication variants: Separate procedures address early spring-and-seat oil-pressure regulators, later cartridge valves, and standard or extended-life filter arrangements. Oil-cooler coverage includes leak testing and replacement; a damaged cooler is not treated as a repairable core.
The oil-fill adapter section also identifies how incorrect mounting screws can side-load the camshaft and damage the engine at startup.
Cooling configurations: The coolant-pump procedures distinguish standard-flow and high-flow impellers. Single- and dual-thermostat arrangements, fan-drive bearings, manual and automatic belt tensioners, and system pressure tests receive separate treatment. Fuel, lubricant, and coolant guidance includes break-in oil and different oil requirements for Tier I and Tier II engines.
Turbocharger diagnosis: Inspection covers axial and radial bearing play, oil-seal leakage, wastegate operation, and intake or exhaust restrictions. The failure-analysis guidance helps distinguish a damaged turbocharger from an engine or airflow problem before a serviceable unit is replaced. Turbochargers are serviced as complete remanufactured assemblies rather than rebuilt from individual repair parts.
Workshop Tools and Illustrated References
Tool references include the JDG739B camshaft bushing service kit and JT05993 torque angle gauge, alongside consolidated torque tables, wear tolerances, and diagnostic specifications.
Three-quarter engine views supplement illustrations such as Cylinder Head Bolt Tightening Sequence and Coolant Pump Assembly. How Engine Cooling System Works, Head Gasket Joint Construction and Operation, and the Excessive Oil Consumption diagnostic charts explain component relationships and fault paths.
Examples of Crankshaft Inspection Clearances
These two values are a small sample of the manual’s base-engine inspection data. Crankshaft end play is specified at 0.029–0.357 mm for the documented thrust-bearing assessment.
The assembled main bearing-to-journal oil clearance is 0.041–0.109 mm. The manual explains that this clearance must remain within specification even when an undersize crankshaft has been installed.
Searchable Text, Bookmarks, and PDF Contents
Text search and navigation: Body text is searchable, with embedded bookmarks for sections and individual procedures. Some embedded charts and tables lack searchable text. Small labels in the illustrated technical references are easier to read when enlarged.
Supplied as one printable, English-language 552-page PDF, including the original cover and 20 blank divider or continuation pages. These pages are already included in the total; no separate supplemental manuals are bundled.
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