Thermo King TK 2.49 - Page 14

TK 2.49 & TK 3.74 Diesel Engine Specifications (Rev 1/97)
10
Piston, Piston Rings, and Wrist Pin (continued)
Piston Ring Groove Width
Top Ring Groove .0610-.0618 in .(1.550-1.570 mm)
Middle Ring Groove .0622-.0628 in. (1.580-1.595 mm)
Bottom Ring Groove .1185-.1191 in. (3.010-3.025 mm)
Piston Ring Width
Top Ring .0579-.0587 in. (1.470-1.490 mm)
Middle Ring .0579-.0587 in. (1.470-1.490 mm)
Bottom Ring .1169-.1177 in. (2.970-2.990 mm)
Piston Ring to Ring Groove Clearance
Middle .0035-.0049 in. (0.090-0.125 mm)
Bottom .0008-.0022 in. (0.020-0.055 mm)
Piston Ring End Gap
Top Ring .006-.014 in. (0.15-0.35 mm) .059 in. (1.50 mm)
Middle Ring .006-.014 in. (.015-.035 mm) .059 in. (1.50 mm)
Bottom Ring .006-.014 in. (0.15-0.35 mm) .059 in. (1.50 mm)
Wrist Pin Bore Inside Diameter .7874-.7877 in .(20.000-20.008 mm) .7882 in. (20.020 mm)
Wrist Pin Outside Diameter .7870-.7874 in .(19.991-20.000 mm) .7835 in. (19.900 mm)
Wrist Pin to Wrist Pin Bore Clearance 0-.0007 in. (0-.017 mm) .0047 in. (0.120 mm)
Connecting Rod
Wrist Pin Bushing Inside Diameter .7884-.7889 in .(20.025-20.038 mm) .7913 in. (20.100 mm)
Wrist Pin to Wrist Pin Bushing
Clearance .0010-.0019 in .(0.025-0.047 mm) .0079 in (0.200 mm)
Side Clearance (Crank to Rod) .008-.016 in .(0.20-0.40 mm) .022 in. (0.55 mm)
Twist per 4 in. (100 mm) .001 in. (0.03 mm) .003 in. (0.08 mm)
Parallelism per 4 in. (100 mm) .001 in. (0.03 mm) .003 in. (0.08 mm)
Crankshaft and Crankshaft Bearings
Main Journal Outside Diameter
Standard 1.5736-1.5740 in. (39.970-39.980 mm) 1.5709 in. (39.900 mm)
Undersize 1.5638-1.5642 in. (39.720-39.730 mm) 1.5610 in. (39.650 mm)
Main Bearing Inside Diameter
Standard 1.5753-1.5759 in. (40.013-40.029 mm) 1.5768 in. (40.050 mm)
Undersize 1.5655-1.5661 in. (39.763-39.779 mm) 1.5669 in. (39.800 mm)
Main Bearing Clearance .0013-.0023 in .(0.033-0.059 mm) .0059 in. (0.150 mm)
Rod Journal Outside Diameter
Standard 1.4161-1.4165 in. (35.970-35.980 mm) 1.4138 in. (35.910 mm)
Undersize 1.4063-1.4067 in. (35.720-35.730 mm) 1.4039 in. (35.660 mm)