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Crankshaft Grinding Specifications
The dimensions and finish for grinding crankshafts are as follows:Diameter (A) for connecting rod bearing journals is;.010 in. (0.25 mm) Undersize ... 2.7396 .0006 in.(69.586 0.015 mm).020 in. (0.51 mm) Undersize ... 2.7296 .0006 in.(69.332 0.015 mm).050 in. (1.27 mm) Undersize ... 2.6996 .0006 in.(68.570 0.015 mm)Surface finish must be 10 micro inches (0.25 micrometers) or less.Radius (B) must be .100 .010 in. (2.54 0.25 mm).Surface finish must be 63 micro inches (1.6 micrometers) or less.The radius must blend smoothly with the newly machined journals.
DIMENSIONS FOR GRINDING
A. Diameter of connecting rod bearing journals. B. Radius on connecting rod bearing journals. C. Width to grind journals for the connecting rods. D. Diameter of main bearing journals. E. Radius on main bearing journals. F. Width to grind journals for the main bearings.Width (C) is 2.314 .003 in. (58.77 0.08 mm)Diameter (D) for main bearing journals is:.010 in. (0.25 mm) Undersize ... 3.4895 .0006 in.(88.633 0.015 mm).020 in. (0.51 mm) Undersize ... 3.4795 .0006 in.(88.379 0.015 mm).050 in. (1.27 mm) Undersize ... 3.4495 .0006 in.(87.617 0.015 mm)Surface finish must be 10 micro inches (0.25 micrometers) or less.Radius (E) must be .095 .010 in. (2.41 0.25 mm)Surface finish must be 63 micro inches (1.6 micrometers) or less.The radius must blend smoothly with the newly machined journals.Width (F) is 1.258 .002 in. (31.95 0.05 mm) for number 4 main bearing journal. Surface finish on the thrust faces of the number 4 main must be 18 micro inches (0.45 micrometers) or less.Width (F) is 1.268 + .020 - .010 in. (32.21 + 0.51 - 0.25 mm) for number 2, 3, and 5 main bearing journals.There is no width (F) for number 1 main bearing journal.When grinding a crankshaft, no material can be removed from the crankshaft webs or counterweights.Crankshaft Gear Removal
Remove the gear using an 8B7548 Push Puller, 8B7551 Bearing Pulling Attachment, 8B75621 Step Plate, and 8H684 Ratchet Box Wrench.
PULLING CRANKSHAFT GEARThe 1P820 Hydraulic Puller Group can also be used to pull gear from crankshaft. Tools required are 1P820 Hydraulic Puller Group, 8B7551 Bearing Pulling Attachment, 8B7549 Puller legs (two), 8B7561 Step Plate, 3H465 Plate (four), 1B4207 Nut (two), and 5P3100 Pump Group.
USING HYDRAULIC PULLERCrankshaft Gear Installation
1. Install the key in keyway of crankshaft. Remove all burrs from key and keyway inside of crankshaft gear.2. Heat gear to 500°F (260°C) maximum.3. Install gear on crankshaft with timing mark on gear facing front of crankshaft.Crankshaft Front Oil Seal Removal
Remove the crankshaft front pulley. Use the 1P3075 Puller Group to remove the crankshaft front oil seal.
REMOVING FRONT OIL SEAL (Typical Example)Remove Crankshaft Rear Seal And Wear Sleeve
Remove the crankshaft rear oil seal with the 1P3075 Puller Group.
REMOVING REAR OIL SEALInstall a 5P7338 Distorter Ring from the 5P7318 Wear Sleeve Distorter Group, in the rear seal bore.
REMOVING REAR WEAR SLEEVE (Typical Example)Install 5P7312 Distorter between distorter ring and wear sleeve. Turn the distorter until the