CONE-BEARING 1B4043 - Caterpillar

Illustration 1 g00482459 (1) Thickness of new thrust plate ... 15.00 0.25 mm (0.591 0.010 inch) (2) Camshaft journal Diameter ... 173.80 0.03 mm (6.843 0.001 inch) (3) Thickness of new plate ... 11.80 0.05 mm (0.465 0.002 inch) (4) Timing bolt location
Correct cam segment relationship (timing) must be observed at assembly. If the cam segments are out of time, serious engine damage will occur.
Illustration 2 g00289768
Location of the dowels on the camshaft bearing journals
Illustration 3 g00482542
Location of the dowels on the camshaft bearing journals
Note: The position of the single dowel in relation to the variable dowel determines the letter designation of the cam journals. The single dowel is located next to the locating groove. The variable dowel is on the end opposite the locating groove. (5) Locating groove (6) Dowel Distance from the top of the dowel to the camshaft bearing journal ... 7.0 0.5 mm (0.28 0.02 inch) (7) Dowel Distance from the top of the dowel to the camshaft bearing journal ... 7.0 0.5 mm (0.28 0.02 inch)
Illustration 4 g03748207
Letter designation of G3608 camshaft journals
Illustration 5 g00482541
Letter designation of G3612 camshaft journals
Illustration 6 g00482543
Letter designation of G3616 camshaft journals
(8) Camshaft bearing journal Install the camshaft bearing journals with the grooved end toward the front of the engine. (9) Camshaft segments Install the camshaft segments with the grooved flange toward the front of the engine. (10) Bolts Torque ... 270 40 N m (200 30 lb ft) (11) The camshaft must be assembled in an assembly fixture or the camshaft must be assembled in the cylinder block. Apply a force at the rear end of the camshaft (11). The rolling torque must be a maximum of the following value. ... 28 N m (21 lb ft)
Illustration 7 g00289772 (12) Specified camshaft lobe lift To find the specified camshaft lobe lift, use the procedure that follows:
Measure the total height of the camshaft (13).
Measure base circle (14).
Subtract base circle (14) from the total height of camshaft (13). The difference is the specified camshaft lobe lift (12).
Specified camshaft lobe lift (12) for the camshaft is the following value: Exhaust lobe ... 19.500 mm (0.7677 inch)Inlet lobe ... 19.500 mm (0.7677 inch)Gas admission lobe ... 10.001 mm (0.3937 inch)