Usage:
Before installing gear, get temperature of gear to a maximum of 300° F (149° C)
(1) End play for the crankshaft ... .006 ± .003 in.(0.15 ± 0.08 mm)
Maximum permissible end play for the crankshaft (worn) ... .012 in.(0.30 mm)
(2) Diameter of bearing surfaces (journals) for the connecting rods [standard, original size] ... 2.7500 ± .0004 in.(69.850 ± 0.010 mm)
Minimum permissible diameter (worn) ... 2.7486 in.(69.814 mm)
Diameter of bearing surfaces (journals) for the connecting rods [.010 in. (0.25 mm) smaller than the original size] ... 2.7400 ± .0004 in.(69.596 ± 0.010 mm)
Minimum permissible diameter (worn) ... 2.7386 in.(69.560 mm)
Diameter of bearing surfaces (journals) for the connecting rods [.020 in. (0.51 mm) smaller than the original size] ... 2.7300 ± .0004 in.(69.342 ± 0.010 mm)
Minimum permissible diameter (worn) ... 2.7286 in.(69.306 mm)
(3) Diameter of bearing surfaces (journals) for the main bearings [standard, original size] ... 3.500 ± .0005 in.(88.900 ± 0.013 mm)
Minimum permissible diameter (worn) ... 3.4985 in.(88.862 mm)
Diameter of bearing surfaces (journals) for the main bearings [.010 in. (0.25 mm) smaller than the original size] ... 3.4900 ± .0005 in.(88.646 ± 0.013 mm)
Minimum permissible diameter (worn) ... 3.4885 in.(88.608 mm)
Diameter of bearing surfaces (journals) for the main bearings [.020 in. (0.51 mm) smaller than the original size] ... 3.4800 ± .0005 in.(88.392 ± 0.013 mm)
Minimum permissible diameter (worn) ... 3.4785 in.(88.354 mm)
Bore in main bearing ... 3.5030 ± .0010 in.(88.976 ± 0.025 mm)
Clearance between main bearing and crankshaft bearing surface (journal) ... .0015 to .0045 in.(0.038 to 0.114 mm)
Maximum permissible clearance between main bearing and crankshaft bearing surface (journal) ... .006 in.(0.15 mm)
Maximum permissible run out (axial eccentricity) of the crankshaft, measured at the center main bearing surface (journal) ... .006 in.(0.15 mm)
Maximum permissible run out (axial eccentricity) of the cranshaft, measured at No.2 and No.4 main bearing surfaces (journal) ... .003 in.(0.08 mm)
(9L8122, 9L8123, 9L8400)
Before installing gear, get temperature of gear to a maximum of 300° F (149° C)
(1) End play for the crankshaft ... .006 ± .003 in.(0.15 ± 0.08 mm)
Maximum permissible end play for the crankshaft (worn) ... .012 in.(0.30 mm)
(2) Diameter of bearing surfaces (journals) for the connecting rods ... 2.7500 ± .0004 in.(69.850 ± 0.010 mm)
Minimum permissible diameter (worn) ... 2.7486 in.(69.814 mm)
(3) Diameter of bearing surfaces (journals) for main bearings ... 3.5000 ± .0005 in.(88.900 ± 0.013 mm)
Minimum permissible diameter (worn) ... 3.4985 in.(88.862 mm)
Bore in main bearing ... 3.5030 ± .0010 in.(88.976 ± 0.025 mm)
Clearance between main bearing and crankshaft bearing surface (journal) ... .0015 to .0045 in.(0.038 to 0.114 mm)
Maximum permissible clearance between main bearing and crankshaft bearing surface (journal) ... .006 in.(0.15 mm)
Maximum permissible run out (axial eccentricity) of the crankshaft, measured at the center bearing surface (journal):
4.1 in. (104.1 mm) stroke engine ... .006 in.(0.15 mm)
4.5 in. (114.3 mm) stroke engine ... .007 in.(0.18 mm)
5.0 in. (127.0 mm) stroke engine ... .008 in.(0.20 mm)