HUB-REAR WHEEL 4372668 - Caterpillar

(1) Cylinder bore [standard, original size] ... 114.300 to 114.338 mm (4.5000 to 4.5015 in) The recommendation is made to make the cylinder bore the next size larger when the size of the bore is ... 114.452 mm (4.5060 in)Cylinder bore must be made the next size larger when the size of the bore is ... 114.529 mm (4.5090 in)Cylinder bore [0.51 mm (.020 in) larger than the original size] ... 114.821 0.013 mm (4.5205 .0005 in)The recommendation is made to make the cylinder bore the next size larger when the size of the bore is ... 114.960 mm (4.5260 in)Cylinder bore must be made the next size larger when the size of the bore is ... 115.037 mm (4.5290 in)Cylinder bore [1.02 mm (.040 in) larger than the original size] ... 115.329 0.013 mm (4.5405 .0005 in)Maximum permissible wear of cylinder bores (replacement of the cylinder block is necessary) ... 115.545 mm (4.5490 in)(2) Bore in block for camshaft bearing ... 67.374 0.013 mm (2.6525 .0005 in) Install camshaft bearings with the oil hole toward the top of the cylinder block.(3) Width of main bearing cap ... 166.624 0.018 mm (6.5600 .0007 in) Minimum permissible width of main bearing cap ... 166.573 mm (6.5580 in)Width of main bearing cap guide (in cylinder block) ... 166.599 0.013 mm (6.5590 .0005 in)(4) Bore in block for main bearing ... 94.170 0.013 mm (3.7075 .0005 in) Permissible amount of crankshaft line bore distortion ... 94.13 to 94.21 mm (3.706 to 3.709 in) (5) Torque for bolts holding caps for main bearings: a. Put 2P2506 Thread Lubricant on bolt threads and washer face.b. Tighten all bolts in number sequence to ... 40 4 N m (30 3 lb ft)c. Put a mark on each bolt and cap.d. Tighten all bolts in number sequence from mark ... 120 5 degrees. (6) Dimension (new) from centerline of crankshaft bearing bore to bottom of block (pan rails) ... 95.250 0.038 mm (3.7500 .0015 in)(7) Dimension (new) from centerline of crankshaft bearing bore to top of block (top deck) ... 322.66 0.13 mm (12.703 .005 in)
There are holes in the bores for the main bearings, between the cylinders for piston cooling tubes. These holes must have piston cooling tubes installed or low oil pressure will be the result.