The John Deere 4039T is a 3.92 L 4-cylinder turbocharged engine rated at 1800 rpm, producing up to 76 kW. It powers generator sets from John Deere and Kohler, including the 4039 and 50ROZ. It holds 13.2 L (3.5 gal) of oil and 18 L (4.8 gal) of coolant.
Also known as: John Deere 4039T
| Oil capacity | 13.2 L |
|---|---|
| Coolant capacity | 18.0 L |
| Displacement | 3.92 L |
| Cylinders | 4 |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
| Gross power | 76 kW |
Shared across brands: John Deere, Kohler
| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Fire Extinguisher | Other | 100 hr | Service | |
| PTO Clutch Shaft Bearing | Lubricate | 100 hr | ||
| PTO clutch shaft bearings | Lubricate | 100 hr | One or two shots of John Deere Multipurpose Lubricant; shaft fittings lubricated at 600 Hours/1-Year | |
| Battery | Other | 250 hr | Service | |
| Engine Oil and Filter | Change | 250 hr | First service — First change after 100 hours max, then every 250 hours; extend by 50 hrs with TORQ-GARD SUPREME PLUS-50 and JD filter | |
| Fan and alternator V-belt tension | Check | 250 hr | On engines with dual belts, check tension of front belt only | |
| PTO clutch adjustment | Check | 250 hr | Measure clutch engagement force at handle grip | |
| V-Belt Tension | Check | 250 hr | ||
| Engine valve clearance | Adjust | 1200 hr | 24 mo | First service — Initial valve clearance adjustment after first 400 hours of operation on new or rebuilt engines |
| Air Intake Hoses | Check | 600 hr | 12 mo | |
| Air cleaner elements | Replace | 600 hr | 12 mo | Inspect and service; always replace secondary element, never clean it |
| Air intake hoses and connections | Check | 600 hr | 12 mo | Tighten hose clamps; inspect hoses for cracks |
| Air intake system | Check | 600 hr | 12 mo | Service air intake system; inspect dust unloader valve |
| Coolant solution | Test | 600 hr | 12 mo | Coolant solution analysis (COOLSCAN); add inhibitor as needed |
| Cooling system | Check | 600 hr | 12 mo | Check entire cooling system for leaks; tighten all clamps securely |
| Crankcase vent tube | Clean | 600 hr | 12 mo | Clean at shorter intervals in dusty conditions |
| Fuel filter element | Replace | 600 hr | 12 mo | Bleed fuel system after replacement |
| PTO clutch internal levers and linkage | Lubricate | 600 hr | 12 mo | Apply one shot of John Deere Multipurpose Lubricant to pivot points and release lever shaft fittings |
| Cooling system | Drain | 1200 hr | 24 mo | Flush cooling system and replace thermostats; fill with recommended clean coolant |
| Cooling system and radiator cap | Test | 1200 hr | 24 mo | Pressure test cooling system and radiator cap at 50 kPa (0.5 bar) (7 psi) |
| Crankshaft vibration damper | Check | 1200 hr | 24 mo | Replace damper every 4500 hours or 5 years, whichever occurs first |
| Engine speeds | Adjust | 1200 hr | 24 mo | Check and adjust engine speeds |
| Engine tune-up | Other | 1200 hr | 24 mo | Recommended every 1200 hours or 2 years, whichever comes first |
| Fuel injection system | Check | 1200 hr | 24 mo | Check engine/injection pump timing, clean injection nozzles, adjust opening pressure |
| Thermostats | Replace | 1200 hr | 24 mo | Remove and discard thermostats and gasket material; install new gasket and thermostats; tighten cap screws to 27 N-m (20 lb-ft) |
| Turbocharger | Inspect | 1200 hr | 24 mo | Check excessive radial or axial end play of compressor wheel and boost pressure on turbocharged engines |
| Coolant inhibitors (SCA) | Check | 6 mo | Check inhibitors between drain intervals every 6 months or 30,000 miles at low speed operation, or 12 months or 25,000 miles at normal operation; replenish with supplemental coolant additive | |
| Coolant solution (glycol and inhibitor level) | Test | 6 mo | 6 month/15,000 mile low speed operation or 12 month/25,000 mile normal operation intervals, and whenever excessive coolant is lost through leaks or overheating | |
| Valve clearance | Check | First service — Recheck valve clearances after engine break-in and adjust as necessary |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | Balancer shaft end play (4-cylinder engines) | 0.05—0.26 | mm (0.002—0.010 in.) | wear limit 0.38 mm (0.015 in.) |
| Clearance | Balancer shaft journal-to-bushing oil clearance | 0.024—0.100 | mm (0.001—0.004 in.) | maximum allowable 0.15 mm (0.006 in.) |
| Clearance | Camshaft end play | 0.08—0.23 | mm (0.003—0.009 in.) | wear limit 0.38 mm (0.015 in.) |
| Clearance | Camshaft thrust plate clearance | 0.08—0.23 | mm (0.003—0.009 in.) | wear limit 0.38 mm (0.015 in.) |
| Clearance | Connecting rod bearing-to-journal oil clearance (new parts 3029/4039/6059) | 0.025—0.102 | mm (0.0012—0.0040 in.) | wear limit 0.152 mm (0.0600 in.) |
| Clearance | Connecting rod bearing-to-journal oil clearance (new parts 4045/6068) | 0.050—0.127 | mm (0.0020—0.0050 in.) | wear limit 0.152 mm (0.0600 in.) |
| Clearance | Crankshaft End Play | .001" - .014" | in | |
| Clearance | Crankshaft end play (new parts, six-piece thrust bearing) | 0.025—0.35 | mm (0.001—0.014 in.) | wear limit 0.50 mm (0.020 in.) |
| Clearance | Crankshaft end play (new parts, two-piece thrust bearing) | 0.05—0.25 | mm (0.002—0.010 in.) | wear limit 0.50 mm (0.020 in.) |
| Clearance | Crankshaft main bearing-to-journal clearance | 0.025—0.102 | mm (0.0009—0.0040 in.) | |
| Clearance | Crankshaft main or rod journal maximum taper / out-of-round | 0.010 / 0.005 | mm (0.0004 / 0.0002 in.) | |
| Clearance | Crankshaft main thrust bearing-to-journal (side) oil clearance | 0.090—0.217 | mm (0.0035—0.0085 in.) | |
| Clearance | Cylinder Liner Protrusion | .001" - .004" | in | |
| Clearance | Cylinder head flatness - maximum acceptable out-of-flat (entire length or width) | 0.08 | mm (0.003 in.) | |
| Clearance | Cylinder head flatness - maximum acceptable out-of-flat per 150 mm (5.90 in.) | 0.03 | mm (0.001 in.) | |
| Clearance | Cylinder head thickness - new | 104.87—105.13 | mm (4.129—4.139 in.) | minimum acceptable 104.24 mm (4.104 in.) |
| Clearance | Cylinder liner height above block | 0.030—0.100 | mm (0.001—0.004 in.) | maximum permissible height difference 0.05 mm (0.002 in.) |
| Clearance | Exhaust valve - lift | 11.28—12.12 | mm (0.444—0.477 in.) | at 0.00 mm (in.) clearance; wear limit 10.85 mm (0.427 in.) |
| Clearance | Exhaust valve - recess in cylinder head | 1.22—1.72 | mm (0.048—0.068 in.) | worn limit 2.26 mm (0.089 in.) |
| Clearance | Flywheel housing seal bore maximum permissible run-out | 0.152 | mm (0.006 in.) | |
| Clearance | Intake valves - lift | 11.56—12.37 | mm (0.455—0.487 in.) | at 0.00 mm (in.) clearance; wear limit 11.13 mm (0.438 in.) |
| Clearance | Intake valves - recess in cylinder head | 0.61—1.11 | mm (0.024—0.044 in.) | worn limit 1.63 mm (0.064 in.) |
| Clearance | Piston Protrusion | .003" - .012" | in | |
| Clearance | Piston protrusion above block deck (using JDG451 or KJD10123 gauge) | 0.08—0.31 | mm (0.003—0.012 in.) | |
| Clearance | Piston protrusion above block deck (using magnetic base dial indicator) | 0.15—0.38 | mm (0.006—0.015 in.) | |
| Clearance | Piston-to-liner clearance (naturally aspirated engines, measured at bottom of piston skirt) | 0.08—0.14 | mm (0.003—0.005 in.) | |
| Clearance | Piston-to-liner clearance (turbocharged engines, measured at bottom of piston skirt) | 0.08—0.15 | mm (0.003—0.006 in.) | |
| Clearance | Upper and lower idler gear end play | 0.14—0.29 | mm (0.006—0.012 in.) | wear limit 0.40 mm (0.016 in.) |
| Clearance | Valve guide-to-valve stem clearance (new) | 0.05—0.10 | mm (0.002—0.004 in.) | wear limit 0.15 mm (0.006 in.) |
| Gap | Air cleaning gun nozzle distance from perforated metal retainer | 25.4 | mm (1.0 in.) | |
| Gap | Timing gear backlash - camshaft-to-upper idler (helical gears) | 0.07—0.35 | mm (0.003—0.014 in.) | wear limit 0.51 mm (0.020 in.) |
| Gap | Timing gear backlash - injection pump-to-upper idler (helical gears) | 0.07—0.35 | mm (0.003—0.014 in.) | wear limit 0.51 mm (0.020 in.) |
| Gap | Timing gear backlash - upper idler-to-crankshaft (helical gears) | 0.07—0.30 | mm (0.003—0.012 in.) | wear limit 0.40 mm (0.016 in.) |
| Other | Air cleaning gun pressure for cleaning primary filter element, maximum | 210 | kPa (2.1 bar) (30 psi) | |
| Other | Camshaft follower-to-bore clearance | 0.06—0.13 | mm (0.002—0.005 in.) | |
| Other | Camshaft thrust plate thickness | 3.96—4.01 | mm (0.156—0.158 in.) | wear limit 3.83 mm (0.151 in.) |
| Other | Crankshaft vibration damper replacement interval | 4500 hours or 5 years, whichever occurs first | ||
| Other | Dual V-belt tension, new belt | 423-467 | N (95-104 lb force) | |
| Other | Dual V-belt tension, used belt | 378-423 | N (85-94 lb force) | belts are considered used after 10 minutes of operation |
| Other | Left-hand auxiliary gear drive, continuous operation | 30 | kW (40 hp) | |
| Other | Left-hand auxiliary gear drive, intermittent operation | 37 | kW (50 hp) | |
| Other | Oil pressure regulating valve | 95 | N·m (70 lb-ft) | |
| Other | PTO clutch engagement force | 267-311 | N (60-70 lb force) | measured at handle grip with a spring scale |
| Other | Poly V-belt deflection with 130 N (30 lb force) applied halfway between pulleys | 13 | mm (1/2 in.) | warm belts |
| Other | Right-hand auxiliary gear drive, continuous operation | 11 | kW (15 hp) | |
| Other | Right-hand auxiliary gear drive, intermittent operation | 19 | kW (26 hp) | |
| Other | Rinsing water pressure for washing primary filter element, maximum | 280 | kPa (2.8 bar) (40 psi) | |
| Other | Single V-belt tension, new belt | 578-622 | N (130-140 lb force) | |
| Other | Single V-belt tension, used belt | 378-423 | N (85-94 lb force) | belts are considered used after 10 minutes of operation |
| Other | Standard V-belt deflection with 89 N (20 lb force) applied halfway between pulleys | 19 | mm (3/4 in.) | warm belts |
| Other | Tachometer drive gear (knurled end) OD | 12.88—12.92 | mm (0.506—0.508 in.) | |
| Other | Valve face angle | 29.25 | degrees ±0.25 | |
| Pressure | Cooling system pressure test | 50 | kPa (0.5 bar) (7 psi) | |
| Pressure | Maximum air intake restriction | 6.22 | kPa (0.06 bar) (1.0 psi) (25 in. H2O) | |
| Pressure | Minimum oil pressure at 850 rpm (3-cylinder engines) | 140 | kPa (1.4 bar) (20 psi) | at 850 rpm |
| Pressure | Minimum oil pressure at 850 rpm (except 3-cylinder) | 103 | kPa (1.03 bar) (15 psi) | at 850 rpm |
| Pressure | Normal engine oil pressure | 380 +/- 103 | kPa (3.80 bar +/- 1.03 bar) (55 +/- 15 psi) | at rated full load speed (1800-2500 rpm) with oil at normal operating temperature of 105 C (220 F) |
| Pressure | Radiator cap pressure test | 50 | kPa (0.5 bar) (7 psi) | gauge should hold pressure for 10 seconds |
| Speed | Fast idle speed (generator set governor) | 3-5% above rated speed | rpm | |
| Speed | Fast idle speed (standard governor) | 7-10% above rated speed | rpm |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | 50/50 mixture of quality water and ethylene glycol concentrate (antifreeze) plus 3% (by volume) supplemental coolant additives (SCA's) | Ethylene glycol concentrate meeting ASTM D5345 (prediluted coolant) or ASTM D4985 (coolant concentrate) | John Deere Prediluted Antifreeze/Summer Coolant, John Deere Antifreeze/Summer Coolant Concentrate, John Deere Low Silicate Antifreeze, or John Deere COOL-GARD. Freeze protection limits by % concentrate: 40% = -24 C (-12 F); 50% = -37 C (-34 F); 60% = -52 C (-62 F). | ||
| Coolant | Water quality specification for mixing with coolant concentrate | Chlorides max 40 ppm (2.5 grains/US gal); Sulfates max 100 ppm (5.9); Total dissolved solids max 340 ppm (20); Total hardness max 170 ppm (10); pH 5.5—9.0 | Distilled, deionized or demineralized water recommended. Water may be used as coolant in emergency situations only. | ||
| Coolant | John Deere PREDILUTED ANTIFREEZE/SUMMER COOLANT, John Deere COOL-GARD, or John Deere ANTIFREEZE/SUMMER COOLANT CONCENTRATE (low silicate ethylene glycol + SCAs); otherwise low silicate ethylene glycol base coolant | ASTM D5345 (prediluted coolant) or ASTM D4985 (coolant concentrate) | above -52°C | 40% concentrate = -24 C (-12 F); 50% = -37 C (-34 F); 60% = -52 C (-62 F). Do not use automotive-type coolants meeting ASTM D3306 or ASTM D4656. Do not use soluble oil. Coolants meeting ASTM D5345/D4985 require an initial charge of supplemental coolant additives. | |
| Coolant | John Deere Prediluted Antifreeze/Summer Coolant, Antifreeze/Summer Coolant Concentrate, Low Silicate Antifreeze, or COOL-GARD | above 52°C | 50/50 mixture of water and ethylene glycol antifreeze plus 3% by volume SCA; 60% concentrate gives -52°C (-62°F) protection | ||
| Engine oil | John Deere ENGINE BREAK-IN OIL; if not available, API Service Classification CE or ACEA Specification E1 | API CE, ACEA E1 | Use during the first 100 hours of operation of a new or rebuilt engine. Do not use PLUS-50 or oils meeting API CG4, API CF4, ACEA E3 or ACEA E2 during break-in. | ||
| Engine oil | John Deere Engine Break-In Oil | Factory fill; drain after first 100 hours of operation; do not use TORQ-GARD SUPREME PLUS-50 during the first 100 hours of operation after an engine rebuild | |||
| Engine oil | John Deere PLUS-50 engine oil preferred; API Service Classification CG-4 or CF-4; ACEA Specification E3 or E2 | API CG-4, API CF-4, ACEA E3, ACEA E2 | Multi-viscosity diesel engine oils preferred. If PLUS-50 oil and a John Deere oil filter are used, the oil and filter service interval may be extended by 50%. If diesel fuel sulfur content is greater than 0.5%, reduce the service interval by 50%. | ||
| Engine oil | John Deere TORQ-GARD SUPREME PLUS-50 (preferred); TORQ-GARD SUPREME; UNI-GARD; API CE or CD | API CE / API CD / CCMC D5 / CCMC D4 | Break-in oil used for first 100 hours; do not use TORQ-GARD SUPREME PLUS-50 during first 100 hours after rebuild | ||
| Engine oil | John Deere TORQ-GARD SUPREME oil also recommended | Select oil viscosity based on the expected air temperature range during the period between oil changes. Temperature limits and service intervals apply to both conventional and synthetic oils. | |||
| Engine oil | John Deere TORQ-GARD SUPREME PLUS-50 (preferred); John Deere TORQ-GARD SUPREME; John Deere UNI-GARD; or oil meeting API CE, API CD, CCMC D5, CCMC D4 | API Service Classification CE or CD; CCMC Specification D5 or D4 | -40°C to 50°C | Use oil viscosity based on expected air temperature range. Arctic oils (MIL-L-46167B) may be used below -30 C (-22 F). If John Deere TORQ-GARD SUPREME PLUS-50 oil and a John Deere oil filter are used, oil and filter service interval may be extended by 50 hours. If diesel fuel sulfur content is greater than 0.5%, reduce engine oil and filter service interval by 50%. | |
| Fuel | Diesel fuel | EN 590 or ASTM D975 | Cetane number 40 minimum (greater than 50 preferred, especially below -20 C or above 1500 m). Sulfur content should not exceed 0.5%; less than 0.05% preferred; DO NOT use fuel with sulfur content greater than 1.0%. Cold Filter Plugging Point below expected low temperature, or Cloud Point at least 5 C (9 F) below expected low temperature. Fuel lubricity should pass a minimum of 3100 gram load level by BOCLE scuffing test. Bio-diesel meeting DIN 51606 or equivalent may be used. DO NOT mix used engine oil or any other lubricant with diesel fuel. | ||
| Fuel | Diesel fuel; Grade No. 1-D fuel best suited below 5 C (40 F) | Military Specification VV-F-800E preferred in North America; EN 590 in most European countries; ASTM D975 | Cetane number 40 minimum (greater than 50 preferred, especially below -20 C or above 1500 m). CFPP below expected low temperature or cloud point at least 5 C below expected low temperature. Sulfur content should not exceed 0.5% (less than 0.05% preferred); do not use diesel fuel with sulfur content greater than 1.0%. Lubricity must pass BOCLE scuffing test at 3300 gram minimum load level. | ||
| Fuel | Diesel per VV-F-800E (North America) or EN 590 (Europe); ASTM D975 minimum Cetane 40 | VV-F-800E / EN 590 / ASTM D975 | Sulfur content should not exceed 0.5%; never exceed 1.0%; reduce oil/filter interval by 50% if sulfur >0.5% | ||
| Grease | John Deere HIGH TEMPERATURE EP GREASE, John Deere MOLY HIGH TEMPERATURE EP GREASE, or John Deere GREASE-GARD | NLGI Performance Classification GC-LB | Use grease based on NLGI consistency numbers and expected air temperature range during the service interval. | ||
| Grease | John Deere MOLY HIGH TEMPERATURE EP; John Deere HIGH TEMPERATURE EP GREASE; John Deere GREASE-GARD; John Deere BIO-GREASE-GARD | NLGI Performance Classification GC and LB | -30°C to 50°C | Arctic greases (MIL-G-10924F) may be used at temperatures below -30 C (-22 F) | |
| Grease | John Deere MOLY HIGH TEMPERATURE EP GREASE, HIGH TEMPERATURE EP GREASE, GREASE-GARD, or BIO-GREASE-GARD | NLGI GC and LB | above 30°C | Arctic grease MIL-G-10924F below -30°C (-22°F) | |
| Other | John Deere Liquid Coolant Conditioner (supplemental coolant additive) | non-chromate inhibitor | Do not over-inhibit antifreeze solutions (causes silicate-dropout). If a system is filled with coolant that does not contain SCAs, precharge with 3% John Deere Coolant Conditioner. | ||
| Other | John Deere PREMIUM DIESEL FUEL CONDITIONER | Add at specified concentration if fuel of low or unknown lubricity is used. Available in winter and summer formulas. | |||
| Other | John Deere TY22030 All Season Diesel Fuel Conditioner | Treat Grade No. 2-D fuel before temperature drops to 0 C (32 F); can also be used to treat No. 1-D fuel; reduces fuel gelling and lowers pour point of untreated fuel from 5 C (40 F) to less than -40 C (-40 F) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
⚠ Never attempt to service the PTO while it is in operation
⚠ Improper adjustments of the PTO clutch may shorten clutch life
Tools: Spring scale
⚠ Valve clearance must be checked/adjusted with engine cold
Tools: JD281A, JDE83, or JDG820 Engine Rotation Tool, JDE81-4 Timing Pin, feeler gauge
⚠ To prevent accidental starting, always disconnect NEGATIVE (-) battery terminal before valve adjustment.
⚠ Valve clearance MUST be checked and adjusted with engine COLD.
Tools: JDE83 or JDG820 Flywheel Turning Tool, JDE81-4 Timing Pin, Feeler gauge, Torque wrench
⚠ ONE LINER SHIM ONLY may be installed under each liner flange. If liner requires more than one shim, install a new liner or cylinder block.
Tools: JDG451 or KJD10123 Height Gauge, D17526CI or D17527CI Dial Indicator, KCD10001 or JDG1145 Cylinder Liner Puller
⚠ Do not apply too much pressure with the bar, as this could damage bearings.
Tools: Dial indicator, Prybar
⚠ Measure valve lift at 0.00 mm (in.) rocker arm-to-valve tip clearance for accuracy.
Tools: JDG820 or JDE83 Flywheel Turning Tool, JDE81-4 Timing Pin, Dial indicator, Feeler gauge
⚠ Do not apply excessive pressure to cooling system; doing so may damage radiator and hoses
Tools: Approved cooling system tester, Gauge and adapter
⚠ Escaping fluid under pressure can penetrate the skin causing serious injury. Relieve pressure before disconnecting fuel or other lines
⚠ If any fluid is injected into the skin, it must be surgically removed within a few hours
Tools: Two wrenches
⚠ Do not overtighten filter element
⚠ Do not blow air from outside portion of filter with air nozzle. Wear safety glasses and remove bystanders
⚠ Only a special air cleaning gun should be used
Tools: Special air cleaning gun
⚠ Do not pry against the alternator rear frame
⚠ Do not tighten or loosen belts while they are hot
Tools: JDG529 Tension Gauge, Belt tension tester, Straightedge
⚠ Explosive release of fluids from pressurized cooling system can cause serious burns. Only remove filler cap when cool enough to touch with bare hands
⚠ Air must be expelled from cooling system when system is refilled
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The John Deere 4039T engine has an oil capacity of 13.2 liters.
The John Deere 4039T has a displacement of 3.92 liters with 4 cylinders.
The John Deere 4039T powers 2 generator set(s), including John Deere 4039, Kohler 50ROZ.