Thermo King TK 2.49 - Page 24

TK 3.95 Diesel Engine Specifications (Rev 1/97)
20
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 .1196-.1177 in. (2.970-2.990 mm)
Piston Ring to Ring Groove Clearance
Middle .0035-.0049 in. (0.090-0.125 mm) .0079 in. (0.200 mm)
Bottom .0008-.0018 in. (0.020-0.045 mm) .0079 in. (0.200 mm)
Piston Ring End Gap
Top Ring .004-.010 in. (0.10-0.25 mm) .059 in. (1.50 mm)
Middle Ring .010-.016 in. (.025-.040 mm) .059 in. (1.50 mm)
Bottom Ring .008-.018 in. (0.20-0.45 mm) .059 in. (1.50 mm)
Wrist Pin Bore Inside Diameter .8268-.8271 in .(21.000-21.009 mm) .8276 in. (21.020 mm)
Wrist Pin Outside Diameter .8264-.8268 in .(20.991-21.000 mm) .8228 in. (20.900 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 .8278-.8283 in .(21.025-21.038 mm) .8307 in. (21.100 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 1.7311-1.7315 in. (43.970-43.980 mm) 1.7283 in. (43.900 mm)
Undersize 1.7213-1.7217 in. (43.720-43.730 mm) 1.7185 in. (43.650 mm)
Main Bearing Inside Diameter
Standard 1.7328-1.7334 in. (44.013-44.029 mm) 1.7343 in. (44.050 mm)
Undersize 1.7230-1.7236 in. (43.763-43.779 mm) 1.7244 in. (43.800 mm)
Main Bearing Clearance .0013-.0023 in .(0.033-0.059 mm) .0059 in. (0.150 mm)
Rod Journal Outside Diameter
Standard 1.5736-1.5740 in. (39.970-39.980 mm) 1.5713 in. (39.910 mm)
Undersize 1.5638-1.5642 in. (39.720-39.730 mm) 1.5614 in. (39.660 mm)