John Deere 6619 Specifications
| Engine Model: John Deere 6619 |
| Engine Type: 4-stroke in-line 6-cylinder liquid-cooled diesel |
| Total Displacement: 619 cu.in (10.1 L) |
| Rated Engine Power: 175-301 Hp (130-224 kW) at 2200 rpm |
| Fuel System Type: Direct injection |
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The John Deere 6619 is a heavy-duty 6-cylinder
naturally aspirated, turbocharged, and turbocharged-intercooled diesel
engine from the 500 Series family. Displacing 10.1 liters, it was the
largest powerplant in this series and served extensively in agricultural
tractors, construction equipment, and industrial machinery throughout
the 1970s and 1980s. This engine famously powered the John Deere 6030,
7520, 8430, 8440, 8630, 8640, and 8650 tractors, as well as large
scrapers and excavators.
The 6619 was produced in multiple variants: the naturally aspirated
6619A, the turbocharged 6619T, and versions with charge-air cooling for
enhanced performance. Its robust 6-cylinder inline configuration with a
130.2 mm bore and 127.0 mm stroke delivered exceptional torque
characteristics suited for demanding agricultural and construction
applications. The engine utilized a Bosch P-Series inline injection pump
and was designed for serviceability in harsh operating environments.
Engine Family: John Deere 500 Series
Engine Codes: 6619A (naturally aspirated)
Engine Codes: 6619T (turbocharged)
Engine Codes: 6619AF and 6619TF (turbocharged-intercooled)
Configuration: Inline 6-cylinder, 4-stroke, liquid-cooled diesel
Displacement: 10140 cc (619 cu.in)
Bore: 130.2 mm (5.125 in)
Stroke: 127.0 mm (5.000 in)
Compression Ratio: 15.2:1
Firing Order: 1-5-3-6-2-4
Rated Engine Speed: 2100 rpm
Maximum Power (6619A): 130-140 kW (175-190 hp)
Maximum Power (6619T/AF/TF): 190-206 kW (255-275 hp)
Maximum Power (high-output): 224 kW (301 hp) at 2100 rpm
Idle Speed (low): 650-700 rpm
Idle Speed (high): 2250-2300 rpm
The cylinder block is constructed from high-grade cast iron with a
deep-skirt design extending below the crankshaft centerline, providing
the rigidity required for sustained high-load operation. The block
features wet-type cylinder liners that are replaceable, allowing for
engine rebuilding without block replacement. Cylinder liner protrusion
above the block deck must be set between 0.025-0.102 mm (0.001-0.004 in)
to ensure proper head gasket sealing.
Seven main bearings support the forged steel crankshaft, with the
bearing caps secured by studs or bolts torqued to specification. The
main journal diameter is specified at 95.2 mm (3.748-3.750 in). The
block incorporates an integral oil gallery running the full length of
the cylinder bank, supplying lubricant to the main bearings, camshaft
bearings, and valvetrain. Cast-in water jackets surround each cylinder
for uniform cooling distribution.
0The cylinder head is manufactured from cast iron and designed as a
single unit covering all six cylinders, a configuration that enhances
rigidity and simplifies gasket sealing. The overhead valve arrangement
employs pushrods and rocker arms actuated by a camshaft located within
the cylinder block. Intake valves are larger in diameter compared to
exhaust valves, reflecting the diesel engine’s air induction
requirements.
Valve lash adjustments are performed with the engine cold using a feeler
gauge between the rocker arm and valve stem tip. Intake valve clearance
is set at 0.013-0.017 in (0.33-0.43 mm). Exhaust valve clearance is set
at 0.023-0.027 in (0.58-0.69 mm). Valve seat inserts are pressed into
the head and machined at 45-degree angles, with exhaust seats receiving
stellite facing for high-temperature durability. The valve guides are
replaceable and made from phosphor bronze or cast iron depending on
production series.
The fuel system utilizes a direct injection configuration with an inline
injection pump, manufactured either by Bosch (P-Series) or Denso
depending on the variant and production date. The pump is mounted on the
side of the cylinder block and gear-driven from the camshaft. Six
individual high-pressure injection lines deliver fuel to the injection
nozzles, which are positioned centrally within each combustion chamber.
The governor system is mechanical, providing both speed control and load
response characteristics calibrated for mobile equipment applications. A
fuel transfer pump, either diaphragm or plunger type depending on the
variant, supplies fuel from the tank to the injection pump at low
pressure. A fuel filter with a replaceable element and water separator
is mounted between the transfer pump and injection pump to protect the
precision injection components from contamination.
The lubrication system is a wet-sump configuration utilizing a gear-type
oil pump mounted on the front of the crankshaft. The pump draws oil from
the sump through a fixed mesh pickup screen and delivers it through a
full-flow spin-on oil filter mounted on the cylinder block. System
capacity varies by oil pan configuration and application, ranging from
26.5 to 30.3 liters (28-32 qt). A larger capacity pan may be specified
for scrapers and other equipment operating on severe slopes.
Recommended oil viscosity is SAE 15W-40 meeting API CD, CE, or CF
specifications. Oil pressure at rated speed is maintained between
3.1-4.5 bar (45-65 psi). A pressure relief valve integrated into the oil
pump housing opens at 4.8 bar (70 psi) to limit maximum system pressure.
The oil pan incorporates baffles and a windage tray to prevent oil
starvation during operation on inclines. Piston cooling jets direct oil
to the underside of each piston crown for thermal management, essential
for turbocharged variants operating at higher specific outputs.
The cooling system is a pressurized liquid-cooled configuration with a
gear-driven centrifugal water pump mounted on the front of the engine. A
wax-pellet thermostat located in the water outlet housing initiates
opening at 82°C (180°F) and reaches full open at 95°C (203°F). System
capacity varies by application and radiator size, ranging from 33 to
42.6 liters (35-45 qt).
An engine-driven fan with a viscous clutch provides variable cooling
airflow based on radiator temperature. A pressurized expansion tank
maintains system pressure at approximately 0.7 bar (10 psi) to raise the
boiling point of the coolant. Coolant specified is ethylene glycol-based
mixed at a 40:60 to 50:50 ratio with distilled water, incorporating
supplemental coolant additives (SCAs) to protect against cavitation
erosion of wet cylinder liners.
| Intake and Exhaust Systems |
Intake System: Dry-type air cleaner with replaceable paper filter
element incorporating a restriction indicator to signal when filter
service is required. Turbocharged variants utilize an air-to-air or
air-to-liquid charge air cooler to reduce intake air temperature.
Exhaust System: Cast iron exhaust manifold routing to a vertical exhaust
stack or muffler. Turbocharged variants mount the turbocharger directly
to the exhaust manifold outlet.
Starting System: 12-volt electrical system with a Denso-style
direct-drive starter motor (12-tooth drive gear, clockwise rotation)
engaging a ring gear on the flywheel. Glow plugs or an intake air heater
is provided for cold starting assistance, depending on variant.
Charging System: Belt-driven alternator with output rating of 55-90 amps
depending on application and equipment electrical load requirements.
Overall Length: 1320 mm (52.0 in).
Overall Width: 760 mm (30.0 in).
Overall Height: 1090 mm (43.0 in) approximate for naturally aspirated
variant; turbocharged variant height increased by 150 mm (6 in).
Dry Engine Weight (without coolant, oil, flywheel, and accessories): 930
kg (2050 lb).
Fully Dressed Weight (with flywheel, alternator, starter, manifolds, and
turbocharger where applicable): 1040 kg (2290 lb).
Oil Change Interval: 150 hours under normal service; 100 hours under
severe duty conditions (dusty environments, heavy loads, high ambient
temperatures). Oil Filter Replacement: Replace at every oil change
interval. Fuel Filter Replacement: 300 hours or as indicated by
restriction; water separator drained daily during operation.
Air Filter Replacement: As indicated by restriction gauge; service
interval varies with operating conditions. Valve Clearance Adjustment:
Inspect every 1000 hours; adjust with engine cold to specifications:
intake 0.013-0.017 in (0.33-0.43 mm), exhaust 0.023-0.027 in (0.58-0.69
mm).
Coolant Replacement: 2000 hours or 24 months; SCA concentration tested
at 500-hour intervals. Fan Belt Inspection: Inspect every 250 hours;
replace if cracking, glazing, or fraying is evident. Injection Pump
Timing: 1000 hours for verification; adjustment requires use of timing
pins or dial indicator. Cylinder Liner Protrusion: Verify when replacing
head gasket; specification range 0.025-0.102 mm (0.001-0.004 in).
Cylinder Head Bolts, Stage 1: 135 Nm (100 lb-ft)
Cylinder Head Bolts, Stage 2: 203 Nm (150 lb-ft)
Cylinder Head Bolts, Stage 3: 244 Nm (180 lb-ft)
Cylinder Head Bolts (high-strength), Stage 1: 203 Nm (150 lb-ft)
Cylinder Head Bolts (high-strength), Stage 2: 271 Nm (200 lb-ft)
Cylinder Head Bolts (high-strength), Stage 3: 325 Nm (240 lb-ft)
Cylinder Head Bolts (high-strength), Stage 4: 325 Nm (240 lb-ft)
Main Bearing Cap Bolts, Stage 1: 135 Nm (100 lb-ft)
Main Bearing Cap Bolts, Stage 2: 285 Nm (210 lb-ft)
Connecting Rod Cap Bolts, Stage 1: 27 Nm (20 lb-ft)
Connecting Rod Cap Bolts, Stage 2: 75 Nm (55 lb-ft)
Flywheel Bolts: 203 Nm (150 lb-ft)
Rocker Arm Shaft Bolts: 75 Nm (55 lb-ft)
Injection Pump Mounting Nuts: 41 Nm (30 lb-ft)
Injection Nozzle Hold-Down Bolts: 85 Nm (63 lb-ft)
Water Pump Mounting Bolts: 61 Nm (45 lb-ft)
Oil Pan Bolts: 41 Nm (30 lb-ft)
Agricultural Tractors: 6030, 7520, 8430, 8440, 8630, 8640, 8650, 8760,
JD700, JD700A.
Crawler Dozers: 850, 855.
Excavators: 890, 890A, 992DLC.
Motor Graders: 770A, 772A, JD770.
Scrapers: 862, 862B, JD760, JD760A, JD762, JD860B.
Wheel Loaders: 744E, JD644B.
Compactors: 646B.
Forage Harvesters: 5400, 5460, 5820, 5830.
Industrial Power Units: Stationary and mobile configurations for various
OEM applications.
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