VALVE-EXHAUST 7W7491 - Caterpillar

Illustration 1 g00288420
(1) Diameter of new drive shaft ... 59.930 0.010 mm (2.3594 .0004 inch) (2) Distance from the end of the drive shaft to the gear face ... 169.5 0.5 mm (6.67 .02 inch)The maximum permissible temperature of the gear ... 316°C (601°F) (3) Distance from the end of the idler shaft to the gear face ... 51.0 0.5 mm (2.01 .02 inch)The maximum permissible temperature of the gear ... 316°C (601°F) (4) Length of gears ... 195.000 0.020 mm (7.6772 .0008 inch) (5) Diameter of idler shaft ... 59.930 0.010 mm (2.3594 .0004 inch)
Illustration 2 g00288421
(6) Distance from the top of the dowels to the surface of the cover ... 12 1 mm (.47 .04 inch) (7) Bore in bearing for idler shaft ... 60.115 0.020 mm (2.3667 .0008 inch) (8) Install the bearings in the cover to the following depth. ... 7.50 0.25 mm (.295 .010 inch) (9) Bore in bearing for drive shaft ... 60.115 0.020 mm (2.3667 .0008 inch) (10) Align the oil holes in the bearings with the oil holes in the cover.
Illustration 3 g00288422
(11) Install the bearings in the housing to the following depth. ... 12.30 0.25 mm (.484 .010 inch)Note: To minimize the press fit, cool the bearings and the bearing driver to the following temperature.-75°C (-103°F) (12) Bore in bearings in housing ... 60.115 0.020 mm (2.3667 .0008 inch) (13) Align the oil hole in the bearing with the oil hole in the housing. (14) The end clearance between the gears and the housing is the following dimension. ... 0.14 to 0.26 mm (.006 to .010 inch)
Illustration 4 g00288423
(15) Oil pump cover assembly Install the dowel to the following height. ... 8 1 mm (.32 .04 inch) (16) Install the dowel in this position for a counterclockwise rotation of the engine. (17) Install the dowel in this position for a clockwise rotation of the engine.