Thermo King TK 2.49 - Page 9

TK 2.44 & TK 3.66 Diesel Engine Specifications (Rev 1/97)
5
Piston, Piston Rings, and Wrist Pin (continued)
Piston Ring Groove Width
Top Ring Groove .0612-.0618 in .(1.555-1.570 mm)
Middle Ring Groove .0598-.0604 in. (1.520-1.535 mm)
Bottom Ring Groove .1382-.1388 in. (3.510-3.525 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 .1366-.1374 in. (3.470-3.490 mm)
Piston Ring to Ring Groove Clearance
Top .0026-.0039 in. (0.065-0.100 mm) .0079 in. (0.200 mm)
Middle .0012-.0026 in. (0.030-0.065 mm) .0079 in. (0.200 mm)
Bottom .0008-.0022 in. (0.020-0.055 mm) .0079 in. (0.200 mm)
Piston Ring End Gap
Top Ring .006-.014 in. (0.15-0.35 mm) .059 in. (1.50 mm)
Middle Ring .010-.016 in. (.025-.040 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) .7864 in. (19.975 mm)
Wrist Pin to Wrist Pin Bore Clearance 0-.0007 in. (0-.017 mm) .0018 in. (0.045 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) .0043 in (0.110 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) .002 in. (0.05 mm) .003 in. (0.08 mm)
Parallelism per 4 in. (100 mm) .002 in. (0.05 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) 1.5717 in. (39.920 mm)
Undersize 1.5638-1.5642 in. (39.720-39.730 mm) 1.5618 in. (39.670 mm)
Main Bearing Inside Diameter
Standard 1.5748-1.5765 in. (40.000-40.042 mm) 1.5776 in. (40.070 mm)
Undersize 1.5650-1.5666 in. (39.750-39.792 mm) 1.5677 in. (39.820 mm)
Main Bearing Clearance .0008-.0028 in .(0.020-0.072 mm) .0059 in. (0.150 mm)
Rod Journal Outside Diameter
Standard 1.4161-1.4165 in. (35.970-35.980 mm) 1.4142 in. (35.920 mm)
Undersize 1.4063-1.4067 in. (35.720-35.730 mm) 1.4043 in. (35.670 mm)