SEAL 8N2301 - Caterpillar

Illustration 1 g01620759
(1) Ring
(3) Idler gear assembly
(13) Plate Note: Before assembly, it is critical that the taper of the camshaft and the tapered bore of the camshaft drive gear are clean, dry, and free of residue.Refer to Disassembly and Assembly for the installation procedure for the left camshaft drive gear (2). (5) Torque for four bolts ... 140 10 N m (105 7 lb ft) (6) Gear shaft Diameter of the gear shaft ... 74.990 0.010 mm (2.9524 0.0004 inch)Bore in the sleeve bearing for the gear shaft ... 75.060 0.010 mm (2.9551 0.0004 inch)Maximum roughness average (Ra) ... 0.8 micrometer (32 microinch)Refer to Disassembly and Assembly for the installation procedure for the right camshaft drive gear (7). (8) Idler shaft Diameter of the idler shaft ... 81.000 0.010 mm (3.1890 0.0004 inch)Bore in the sleeve bearing for the idler shaft ... 81.060 0.010 mm (3.1913 0.0004 inch)Maximum roughness average (Ra) ... 0.8 micrometer (32 microinch)
Illustration 2 g01256372
Vertical line
(9) Use the following procedure to tighten the bolt for the camshaft drive gears:
Tighten the bolt for the camshaft drive gear to 360 40 N m (270 30 lb ft).
Mark a vertical line on the head of the bolt for the camshaft drive gear. Refer to Illustration 2.
Place a driver against the retaining plate of the camshaft drive gear. Strike the driver solidly with a hammer 3 to 4 times.
Again, tighten the bolt for the camshaft drive gear to 360 40 N m (270 30 lb ft).
Illustration 3 g01256393
Repeat Steps 3 and 4 until the mark on the bolt turns a minimum of 90 degrees. Refer to Illustration 3. (10) Torque for four bolts ... 240 20 N m (175 15 lb ft) (11) Torque for two bolts ... 240 20 N m (175 15 lb ft)
Illustration 4 g01620761
Rear view of engine
(14) The mark on the cluster gear assembly (4) must be in alignment with the mark on the crankshaft gear (12).