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TK 3.88 Diesel Engine Specifications
General TK 3.88
Model 3TNA72
Type Four Stroke Cycle
Water Cooled
Number of Cylinders 3
Bore 2.83 in. (72.0 mm)
Stroke 2.83 in. (70.2 mm)
Displacement 53.6 cu. in. (879 cc)
Power Rating 15.2 hp (11.2 kW)
Compression Ratio 22.3 to 1
Direction of Rotation Counterclockwise
(Viewed from Flywheel)
Firing Order 1, 3, 2
Fuel Injection Timing 16 Degrees BTDC
Nozzle Injection Pressure 1707 psi (11768 kPa)
Oil Pressure 18.5 psi (127 kPa) Minimum
@ 230 F (110 C) and 1600 rpm
Valve Train Standard Dimensions Wear Limit
Valve Spring
Free Length 1.47 in. (37.4 mm) 1.33 in. (33.7 mm)
Inclination .04 in. (1.0 mm)
Valve Guide Inside Diameter
Intake .2758-.2764 in. (7.005-7.020 mm) .2787 in. (7.080 mm)
Exhaust .2758-.2764 in. (7.005-7.020 mm) .2787 in. (7.080 mm)
Valve Stem Outside Diameter
Intake .2734-.2740 in. (6.945-6.960 mm) .2717 in. (6.900 mm)
Exhaust .2734-.2740 in. (6.945-6.960 mm) .2717 in. (6.900 mm)
Valve Depth
Intake .020 in. (0.50 mm) .039 in. (1.00 mm)
Exhaust .033 in. (0.85 mm) .039 in. (1.00 mm)
Valve Guide Projection
Intake .354 in. (9.00 mm)
Exhaust .354 in. (9.00 mm)
Valve Stem to Rocker Arm Clearance
Intake .008 in. (0.20 mm)
Exhaust .008 in. (0.20 mm)
Valve Seat Angle
Intake 30 Degrees
Exhaust 45 Degrees
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