John Deere 6059 — Specs, Engine, Parts & Maintenance

Specifications

Standby power	100 kW
Oil capacity	17.0 L

Engine

John Deere 6059T

Oil capacity	17.0 L
Coolant capacity	19.7 L
Displacement	5.9 L
Aspiration	Turbocharged
Rated speed	1800 rpm

Filters for the John Deere 6059T

Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.

System	Filter	Description	Cross-references
Oil filter	P550020	Lube Filter, Spin-On Full Flow	JOHN DEERE AR58956, JOHN DEERE AT19044T, NAPA 1243, RENAULT VI 0003132302	KuduParts $23.00 FridayParts $25.67
Fuel filter	P550090	Fuel Filter, In-Line	JOHN DEERE AE20952, JOHN DEERE AT101565, ASV INCORPORATED 0201914, LOESING 025125	FridayParts $45.66
Fuel filter	P551130	Fuel Filter, Box	JOHN DEERE AR50041, JOHN DEERE R16951, NAPA 3370, BALDWIN BF909	KuduParts $37.00
Fuel / water separator	P551424	Fuel Filter, Water Separator Spin-On	JOHN DEERE RE503198, JOHN DEERE RE522868, NAPA 3532, NAPA 600094	KuduParts $16.00 FridayParts $18.50
Fuel / water separator	P551430	Fuel Filter, Water Separator Cartridge	JOHN DEERE RE52424, JOHN DEERE RE61723, PONSSE 0067409, CATERPILLAR 1174089	FridayParts $47.99

Same engine, other brands

2 brands

The John Deere 6059T in this set also powers 4 generator sets sold under 2 other brands. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.

Brand	Models
Kohler	100ROZ, 80ROZJ
Military MEP	MEP-806, MEP-816A

Maintenance & consumables

for the John Deere 6059T

Item	Spec	Capacity	Part #	Interval
Oil filter			—	300 hr

Compatible filters for the John Deere 6059T — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.

Oil filter: John Deere DZ118286 John Deere AR58956 Donaldson P551352 Donaldson P550020 Wix 57243

Service intervals

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.

Service specifications

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.

Recommended fluids

Fluid	Grade	Standard	Ambient	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.

Procedures

Check PTO Clutch Adjustment adjustment

⚠ Never attempt to service the PTO while it is in operation

⚠ Improper adjustments of the PTO clutch may shorten clutch life

Tools: Spring scale

Measure clutch engagement force at handle grip using a spring scale. Engagement force should be 267-311 N (60-70 lb force).
If adjustments are needed, disengage clutch and stop engine. Remove cover plate from clutch housing.
Remove adjusting lock.
Turn adjusting ring to adjust clutch engagement pressure.
Measure engagement force at clutch handle with spring scale.
Install adjusting lock and tighten screw securely.
Install cover plate and recheck clutch engagement force.

Check and Adjust Engine Valve Clearance adjustment

⚠ Valve clearance must be checked/adjusted with engine cold

Tools: JD281A, JDE83, or JDG820 Engine Rotation Tool, JDE81-4 Timing Pin, feeler gauge

Remove rocker arm cover and crankcase ventilator hose.
Remove plugs or cover plate from flywheel housing timing holes.
Rotate engine clockwise using engine rotation tool and timing pin until No. 1 cylinder is at TDC compression, insert timing pin.
Adjust valve clearance per firing order for 3-, 4-, or 6-cylinder engine: Intake 0.35 mm (0.014 in.), Exhaust 0.45 mm (0.018 in.).
If rocker arm has adjusting screw and jam nut, tighten jam nut to 27 N·m (20 lb-ft) after adjusting clearance.
Install rocker arm cover with new gasket.

Check and Adjust Valve Clearance adjustment

⚠ 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

Disconnect NEGATIVE (-) battery terminal; remove rocker arm cover and crankcase ventilator tube.
Remove plastic plug or cover plate from engine rotation/timing holes.
Using JDE83 or JDG820 Flywheel Turning Tool, rotate flywheel in running direction until No. 1 cylinder is at TDC compression stroke.
If No. 1 rocker arms are loose, engine is at No. 1 TDC compression; otherwise rotate one full revolution.
Insert JDE81-4 Timing Pin in flywheel.
Check intake clearance 0.31—0.38 mm (0.012—0.015 in.) and exhaust 0.41—0.48 mm (0.016—0.019 in.) cold.
Loosen locknut on rocker arm adjusting screw; turn screw until feeler gauge slips with slight drag.
Hold adjusting screw and tighten locknut to 27 N•m (20 lb-ft); recheck clearance.
Adjust intake to 0.36 mm (0.014 in.) and exhaust to 0.46 mm (0.018 in.) cold.

Measure Cylinder Liner Standout (Height Above Block) adjustment

⚠ 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

Be sure liner bore in cylinder block and top deck of block are clean.
Install liner without O-rings and packing; liner should rotate smoothly by hand.
Locate liner mark toward front of engine; secure with cap screws and washers tightened to 68 N•m (50 lb-ft).
Using JDG451 or KJD10123 Gauge and D17526CI or D17527CI Dial Indicator, measure liner height at 1, 5, 7 and 11 o'clock positions viewed from flywheel end.
Record measurements by cylinder number and compare with specification.
If liner height is no more than 0.08 mm (0.003 in.) below top deck of block, install one liner shim under liner flange.
Remove and shim or replace any liner that does not meet height specifications.

Check Crankshaft End Play diagnostic

⚠ Do not apply too much pressure with the bar, as this could damage bearings.

Tools: Dial indicator, Prybar

Position dial indicator on contact face of flywheel, front crankshaft nose, damper or front pulley assembly.
Using a prybar, gently push crankshaft as far to rear of engine as possible.
Zero the dial indicator.
Gently pry the crankshaft as far forward as possible.
Note indicator reading; if end play is not within specifications, install new thrust bearing.

Measure Valve Lift diagnostic

⚠ 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

Remove rocker arm cover.
Lock No. 1 piston at TDC compression stroke.
Set rocker arm-to-valve tip clearance to 0.00 mm (in.) for the specified valves.
Place dial indicator tip on top of valve spring retainer or rotator; preload and set dial at 0.0 mm.
Remove timing pin and rotate engine one full revolution (360°) in running direction.
Observe dial indicator reading at full open; record maximum and compare with specifications.
Repeat for remaining valves after rotating one revolution to the appropriate TDC.

Pressure Test Cooling System and Radiator Cap diagnostic

⚠ Do not apply excessive pressure to cooling system; doing so may damage radiator and hoses

Tools: Approved cooling system tester, Gauge and adapter

Remove radiator cap and attach to an approved tester.
Pressurize cap to 50 kPa (0.5 bar) (7 psi). Gauge should hold pressure for 10 seconds within the normal range if cap is acceptable.
If gauge does not hold pressure, replace radiator cap.
Remove the cap from gauge, turn it 180 degrees, and retest cap.
For cooling system test: allow engine to cool, then carefully remove radiator cap.
Fill radiator with coolant to the normal operating level.
Connect gauge and adapter to radiator filler neck. Pressurize cooling system to 50 kPa (0.5 bar) (7 psi).
With pressure applied, check all cooling system hose connections, radiator, and overall engine for leaks.

Bleed the Fuel System maintenance

⚠ 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

Loosen the air bleed plug or air bleed screw on fuel filter base.
When equipped, operate supply pump primer lever or switch on the ignition (electric supply pumps).
Wait until fuel flow is free from air bubbles. Tighten bleed plug or screw securely, continue operating hand primer until pumping action is not felt. Push hand primer inward.
If engine will not start, slightly loosen fuel supply line connector at injection pump.
Pump hand primer lever until fuel without air bubbles flows from fuel supply line connection.
Tighten supply line connector to 27 N-m (20 lb-ft).
Leave hand primer in the inward position toward cylinder block.
If engine still will not start, move speed control lever to slow idle.
While cranking engine, loosen one fuel line connector slightly using two wrenches until fuel free of air bubbles flows. Tighten connector while cranking.
Repeat procedure for remaining injection nozzles until engine starts and air has been removed.

Change Engine Oil and Filter maintenance

⚠ Do not overtighten filter element

Run engine approximately 5 minutes to warm up oil, then shut off.
Drain oil while warm from crankcase.
Remove and discard oil filter element; clean filter mounting pad.
Oil new packing and install new filter element; hand tighten per values on filter, or approximately one turn after packing contacts housing.
Install drain plug with new seal if equipped.
Fill crankcase with correct John Deere engine oil.

Cleaning Primary Filter Element maintenance

⚠ 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

Gently pat sides of element with palm of hand to loosen dirt. Do not tap element against a hard surface.
Insert the cleaning gun into element, hold air nozzle about 25.4 mm (1.0 in.) from perforated metal retainer.
Force air through filter from inside to outside and move air gun up and down pleats to remove as much dirt as possible.
Repeat steps 1 and 2 to remove additional dirt.
Inspect element for damage after cleaning. Replace element if any damage is found.

Fan and Alternator Belts Tension or Replacement maintenance

⚠ 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

Inspect belts for cracks, fraying, or stretched out areas. Replace if necessary.
Using JDG529 Tension Gauge or belt tension tester and straightedge, check tension of warm belts.
If adjustment is necessary, loosen alternator bracket cap screw and nut on mounting bolt. Pull alternator frame outward until belts are correctly tensioned.
Tighten alternator bracket cap screw and nut firmly.
After a new or used belt has run for 10 minutes, recheck belt tension.

Flush Cooling System and Replace Thermostats maintenance

⚠ 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

Slowly open the cooling system filler cap or radiator cap to relieve pressure.
Open radiator drain valve. Drain all coolant from radiator.
On left side of engine, open drain valve or remove drain plug from engine block. Drain all coolant from engine block.
Close all drain valves after coolant has drained.
Fill the cooling system with clean water. Run the engine about 10 minutes to stir up possible rust or sediment.
Stop engine and immediately drain the water before rust and sediment settle.
Fill the cooling system with clean water and TY15979 John Deere Heavy Duty Cooling System Cleaner or equivalent cleaner.
Fill with water to flush the system. Run engine about 10 minutes, then drain flushing water.
For thermostat replacement, remove cap screws and thermostat cover.
Remove and discard thermostats and all gasket material.
Install new gasket, new thermostats and cover. Tighten all cap screws to 27 N-m (20 lb-ft).
Add coolant to radiator until coolant touches bottom of filler neck.
Run engine until it reaches operating temperature; normal coolant temperature range is 82-94 C (180-202 F).
After running engine, check coolant level and entire cooling system for leaks.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

What size generator is the John Deere 6059?

The John Deere 6059 is rated 100 kW standby.

What engine does the John Deere 6059 use?

The John Deere 6059 is powered by the John Deere 6059T engine.

How much oil does the John Deere 6059 take?

The John Deere 6059T engine in the John Deere 6059 has an oil capacity of 17.0 liters.

What is the cooling system capacity of the John Deere 6059?

The John Deere 6059 cooling system holds 19.7 liters (5.2 US gallons) for the engine, per the manufacturer specification sheet.

What oil filter does the John Deere 6059 use?

The John Deere 6059 uses oil filter part numbers JOHN DEERE DZ118286, JOHN DEERE AR58956.

Repair guides

Step-by-step procedures compiled from the John Deere service manual for this model.

Parts

Part #	Description	Qty	System
0015-2	Air Cleaner Element Replacement		Air filter	Amazon eBay
0017-1	Diesel Fuel		Fluid	Amazon eBay
0018-1	Draining Fuel Filter/Water Separator		Fuel filter	Amazon eBay
271662	Alternator Assembly	1	Sensor	eBay
273693	O-ring, 1.475 ID x 0.118 in. rubber	1	Seal	Amazon eBay
290090	Switch, low water temperature	1	Sensor	Amazon eBay
88-20191	Hose Assembly		Hose	Amazon eBay
88-22546	Pump Assembly, Fuel		Pump	Amazon eBay
88-22549	Switch Assembly, Fuel Level		Sensor	Amazon eBay
FP-4039A	Gasket Kit, Aftercooler		Gasket	Amazon eBay
FP-RE38858-WS	Gasket Set, Complete Overhaul w/Front and Rear Seals		Gasket	Amazon eBay
PG303PS	Gasket Set, Oil Pan		Gasket	Amazon eBay
PG359S	Gasket Set, In-frame Overhaul		Gasket	Amazon eBay
RG4906	Fuel injection pump model and serial information on serial number plate		Fuel pump	Amazon eBay
0021-1	Components of End Item List		Service part / kit	Amazon eBay
273759	Anticipatory High Water Temp. Switch	1	Service part / kit	Amazon eBay
88-22120	Control Panel Holder		Service part / kit	Amazon eBay
88-221206	Resistor-Diode Assembly		Service part / kit	Amazon eBay
88-22127	Cable Assembly, Battery		Service part / kit	Amazon eBay
88-22179	. . LEAD, STORAGE, BATTERY (NOT SHOWN) ....................................	1	Service part / kit	Amazon eBay
88-22206	Cable Assembly, Battery		Service part / kit	Amazon eBay
88-22207	Cable Assembly, Battery		Service part / kit	Amazon eBay
88-22208	Cable Assembly, Battery		Service part / kit	Amazon eBay
88-22418-2	Diode Assembly		Service part / kit	Amazon eBay
88-22469	Cord, Load Wrench		Service part / kit	Amazon eBay
88-22550	Transducer Assembly		Service part / kit	Amazon eBay
88-22553	Solenoid Assembly		Service part / kit	Amazon eBay
88-22592	Insulation, Baffle		Service part / kit	Amazon eBay
88-22596	Insulation, Housing, Front		Service part / kit	Amazon eBay
88-22598	Insulation, Rear Panel		Service part / kit	Amazon eBay
88-22599	Insulation, Duct Floor		Service part / kit	Amazon eBay
88-22600	Insulation, Duct Floor		Service part / kit	Amazon eBay
88-22601	Insulation, Door		Service part / kit	Amazon eBay
88-22602	Insulation, Top Front		Service part / kit	Amazon eBay
88-22603	Insulation, Center, RS		Service part / kit	Amazon eBay
88-22604	Insulation, Center, Front		Service part / kit	Amazon eBay
88-22605	Insulation, Top Center		Service part / kit	Amazon eBay
88-22609	Insulation, Door		Service part / kit	Amazon eBay
88-22610	Insulation, Door		Service part / kit	Amazon eBay
88-22611	Insulation, Panel, Top		Service part / kit	Amazon eBay
88-22612	Insulation, Baffle		Service part / kit	Amazon eBay
88-22614	Insulation, Panel RS		Service part / kit	Amazon eBay
88-22615	Insulation, Baffle		Service part / kit	Amazon eBay
88-22616	Insulation, Air Baffle		Service part / kit	Amazon eBay
88-22631	Resistor Assembly, Volt		Service part / kit	Amazon eBay
88-22637	Insulation, Panel LS		Service part / kit	Amazon eBay
88-22758	Capacitor Assembly, EMI		Service part / kit	Amazon eBay
88-22769	Insulation, Baffle		Service part / kit	Amazon eBay
88-22770	Insulation, Door		Service part / kit	Amazon eBay
RG4622	PTO serial number and model number on cover plate of PTO housing		Service part / kit	Amazon eBay
RG4904	Engine serial number plate		Service part / kit	Amazon eBay
RG7225	Saran serial number plate		Service part / kit	Amazon eBay

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

Rating	Load	L/h	gal/h
Standby		1250.0	330.22

Available documents

Engine spec — 6059T 134 (John Deere)Engine spec — 6059T 143 (John Deere)Engine spec — 6059T 165 (John Deere)Engine spec — 6059T 166 (John Deere)Engine spec — John Deere 415Y (John Deere)Operator's manual — 237946 (John Deere)Operator's manual — JOHN DEERE Series 300 3029 4039 4045 6059 6068 OEM Diesel Operation and Maintenance Manual 1993 (John Deere)Service manual — john-deere-300-3029-4039-4045-6059-6068-operation-and-service-manual (John Deere)Service manual — tp5419 (John Deere)Service manual — tp5430 (John Deere)Service manual — tr-jd-3029-4039-4045-6059-6068-Litre-TSI (John Deere)

This page was generated from the 11 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

John Deere 6059 Generator Set

Specifications

Engine

Filters for the John Deere 6059T

Same engine, other brands

Maintenance & consumables

Service intervals

Service specifications

Recommended fluids

Procedures

Common questions

Repair guides

Parts

Fuel consumption

Available documents