PISTON-CLUTCH 3P9367 - Caterpillar

3003 Engine
Retaining Bolts for the Crankshaft
Illustration 1 g00692899
(1) Allen head screws Tighten the allen head screw to the following torque. ... 27 N m (20 lb ft) (2) Hex head bolts Tighten the hex head bolts to the following torque. ... 27 N m (20 lb ft)Specifications
Illustration 2 g00693067
Typical example for the three cylinder engine (1) ChamferThe chamfer faces the front of the engine. (2) Upper half of the main bearing with the oil groove (3) Upper half of main bearing cap (4) Notch on the upper half of the main bearingThe notch in this position on the bearing cap faces the rear of the engine. This bearing cap is for the No. 2 bearing on three cylinder engines. (5) Connecting rod journal Diameter of connecting rod journal ... 38.964 to 38.975 mm (1.5340 to 1.5344 inch) Service limit ... 38.90 mm (1.5315 inch)Note: If the service limit is exceeded, then the crankshaft must be replaced. (6) Main bearing journal Diameter of main bearing journal ... 45.964 to 45.975 mm (1.8096 to 1.8100 inch) Service limit ... 45.90 mm (1.8071 inch)Note: If the service limit is exceeded, then the crankshaft must be replaced. (7) Lower half of the main bearingThe lower half of the main bearing does not have an oil groove.Measure Wear on the Crankshaft
Illustration 3 g00464232
Measure the crankshaft journals for wear.Measure the diameters of the crankshaft journals that is shown in Illustration 3. This procedure measures wear and eccentricity. Measure the diameters of the connecting rod journals (5) and main journals (6) in positions (1) and (2). Measure the diameter (A) and (B) in each position. (1) (2) Taper The difference between positions (1) and (2) must not be more than the following value. ... 0.05 mm (0.0020 inch) (A) (B) Eccentricity The eccentricity must be the following value or the eccentricity must be less than the following value. ... 0.03 mm (0.0012 inch) Service limit ... 0.06 mm (0.0024 inch)Measure the Main Bearing Clearance
Illustration 4 g00464228
Illustration of the front main bearingMeasure the bore of the main bearings in positions (1) and (2). Measure the bore in the directions (A) and (B) in each position.Refer to the dimensions in this Module "Measure Wear on the Crankshaft". Subtract the smallest diameter of the crankshaft journal from the largest main bearing bore. The remainder is the clearance between the main bearing and the crankshaft journal.Clearance Standard clearance ... 0.039 to 0.106 mm (0.0015 to 0.0042 inch) Service limit ... 0.20 mm (0.0079 inch)If the measurements are outside of the tolerances, the main bearings or the crankshaft must be replaced.The end play is measured on the front main bearing journal. End play of the crankshaft ... 0.05 to 0.30 mm (0.0020 to 0.0118 inch) Service limit ... 0.50 mm (0.0197 inch)Measure the Clearance on the Main Bearing Cap
Main bearing cap 1, main bearing cap 2, and main bearing cap 3 Standard clearance ... 0.039 to 0.092 mm (0.0015 to 0.0036 inch) Service limit ... 0.20 mm (0.0079 inch)Measure the Connecting Rod Bearing