Engine Design

LOWER FRONT GEAR GROUP

(1) Drive gear for water and oil pumps. (2) Idler gear. (3) Crankshaft gear. (4) Bore in bearing (after assembly) ..........................106.000 _ 0.065 mm (4.1732 _ .0026 in.)

Diameter of shaft (new) .................................105.880 ± 0.020 mm (4.1685 + .0008 in.) (5) Bore in bearings (after assembly) ..........................75.000 _ 0.055 mm (2.9528 _ .0022 in.)

Diameter of shaft (new) .................................74.900 + 0.015 mm (2.9488 + .0006 in.) (6) Thickness of thrust washer (new) .....................8.50 + 0.05 mm (.335 _ .002 in.)

Width of groove in shaft (new) ........................8.750 _ 0.025 mm (.3445 + .0010 in.)

End play for shaft ..................................0.175 to 0.325 mm (.0069 to .0128 in.)

NOTE: FOR TORQUE VALUES NOT GIVEN, SEE THE FIRST PAGE OF SPECIFICATIONS FOR GENERAL TIGHTENING TORQUES

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UPPER FRONT GEAR GROUP (7N4871)

(1) Bore in the bearings (after assembly) ..................................75.000 + 0.055 mm (2.9528 _ .0022 in.) Diameter of shaft ...........................................74.900 _ 0.015 mm (2.9488 + .0006 in.) (2) Drive gear on shaft for governor drive. (3) Thickness of washer (new) ..........................................8.50 ± 0.05 mm (.335 _ .002 in.) Width of groove in shaft (new) ..........................................8.750 _ 0.025 mm (.3445 + .0010 in.) End play for the shaft ...........................................0.175 to 0.325 mm (.0069 to .0128 in.) (4) Gear fastened to water and oil pump drive.

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