John Deere 6068 User Manual
Specifications
OURGP11,0000089
–19–27JUL06–1/2
General OEM Engine Specifications
ITEM
4045DF270
4045TF270
4045TF/HF275
4045HF475
6068TF/HF275
6068HF475
Number of Cylinders
4
4
4
4
6
6
Bore
106 mm
106 mm
106 mm
106 mm
106 mm
106 mm
(4.19 in.)
(4.19 in.)
(4.19 in.)
(4.19 in.)
(4.19 in.)
(4.19 in.)
Stroke
127 mm
127 mm
127 mm
127 mm
127 mm
127 mm
(5.0 in.)
(5.0 in.)
(5.0 in.)
(5.0 in.)
(5.0 in.)
(5.0 in.)
Displacement
4.5 L
4.5 L
4.5 L
4.5 L
6.8 L
6.8 L
(276 cu in.)
(276 cu in.)
(276 cu in.)
(276 cu in.)
(414 cu in.)
(414 cu in.)
Compression Ratio
17.6:1
17.0:1
17.0:1
17.0:1
17.0:1
17.0:1
Aspiration
Natural
Turbocharged
Turbocharged
Turbocharged
Turbocharged
Turbocharged
Engine Firing Order
1-3-4-2
1-3-4-2
1-3-4-2
1-3-4-2
1-5-3-6-2-4
1-5-3-6-2-4
Valves Per Cylinder
1 Intake
1 Intake
1 Intake
2 Intake
1 Intake
2 Intake
1 Exhaust
1 Exhaust
1 Exhaust
2 Exhaust
1 Exhaust
2 Exhaust
Valve Clearance (Cold)
Intake (Checking)
Intake (Checking)
0.31-0.38 mm
0.31-0.38 mm
0.31-0.38 mm
0.31-0.38 mm
0.31-0.38 mm
0.31-0.38 mm
(0.012-0.015 in)
(0.012-0.015 in)
(0.012-0.015 in)
(0.012-0.015 in)
(0.012-0.015 in)
(0.012-0.015 in)
Exhaust (Checking)
0.41-0.48 mm
0.41-0.48 mm
0.41-0.48 mm
0.41-0.48 mm
0.41-0.48 mm
0.41-0.48 mm
(0.016-0.019 in)
(0.016-0.019 in)
(0.016-0.019 in)
(0.016-0.019 in)
(0.016-0.019 in)
(0.016-0.019 in)
Intake (Adjusting)
0.36 mm
0.36 mm
0.36 mm
0.36 mm
0.36 mm
0.36 mm
(0.014 in.)
(0.014 in.)
(0.014 in.)
(0.014 in.)
(0.014 in.)
(0.014 in.)
Exhaust (Adjusting)
0.46 mm
0.46 mm
0.46 mm
0.46 mm
0.46 mm
0.46 mm
(0.018 in.)
(0.018 in.)
(0.018 in.)
(0.018 in.)
(0.018 in.)
(0.018 in.)
Max. Crank Pressure
0.5 kPa
0.5 kPa
0.5 kPa
0.5 kPa
0.5 kPa
0.5 kPa
(2 H
2
O)
(2 H
2
O)
(2 H
2
O)
(2 H
2
O)
(2 H
2
O)
(2 H
2
O)
Vibration Damper
1.50 mm
1.50 mm
1.50 mm
1.50 mm
1.50 mm
1.50 mm
Maximum Radial Runout
(0.060 in.)
(0.060 in.)
(0.060 in.)
(0.060 in.)
(0.060 in.)
(0.060 in.)
Battery Capacities (CCA)
12-Volt System
12-Volt System
640
640
640
640
800
800
24-Volt System
570
570
570
570
570
570
Governor Regulation
7—10 %
7—10 %
7—10 %
7—10 %
7—10 %
7—10 %
(Industrial)
Governor Regulation
5 %
5 %
5%
5%
5 %
5%
(Generator)
Thermostat Start To
82
°
C
82
°
C
82
°
C
82
°
C
82
°
C
82
°
C
Open Temperature
(180
°
F)
(180
°
F)
(180
°
F)
(180
°
F)
(180
°
F)
(180
°
F)
Thermostat Fully Open
94
°
C
94
°
C
94
°
C
94
°
C
94
°
C
94
°
C
Temperature
(202
°
F)
(202
°
F)
(202
°
F)
(202
°
F)
(202
°
F)
(202
°
F)
Coolant Capacity
8.5 L
8.5 L
8.5 L
8.5 L
11.3 L
11.3 L
(9 qt)
(9 qt)
(9 qt)
(9 qt)
(12 qt)
(12 qt)
Recommended Radiator
70 kPa
70 kPa
70 kPa
70 kPa
70 kPa
70 kPa
Pressure Cap
(10 psi)
(10 psi)
(10 psi)
(10 psi)
(10 psi)
(10 psi)
Crankcase Oil Fill
See “Engine Crankcase Oil Fill Quantities” later in this section.
Capacity
55-1
080706
PN=228
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