GASKET 3438888 - Caterpillar

Illustration 1 g06293877
Typical example
Illustration 2 g06293895
(1) Camshaft drive gear
(2) Plate
(3) Bolt
Illustration 3 g06294424
Vertical Line
Illustration 4 g06294427
Illustration 5 g06293919
(12) Alignment mark
(13) Crankshaft gear
Table 1
Item Qty Part Specification Description
1 2 100-6518 Camshaft Drive Gear Use the following procedure to tighten the bolt for the camshaft drive gear.
Note: It is critical that the taper of the camshaft and the tapered bore of the camshaft gear are clean, dry, and free of residue before assembly.
1. Tighten the retaining bolt (3) of the camshaft gear (1) to 360 N m (265 lb ft).
2. Mark a vertical line on the head of the bolt for the camshaft gear. Refer to Illustration 3.
3. Place a driver against the retaining plate of the camshaft gear. Strike the drive solidly with a hammer 3 to 4 times.
4. Tighten the retaining bolt for the camshaft gear again to 360 N m (265 lb ft).
5. Repeat step 3 and step 4 until the mark on the bolt turns a minimum of 90 degrees. Refer to Illustration 4.
6. Tighten the bolt (5) to 240 20 N m (175 15 lb ft).
2 2 4W-4586 Plate
3 2 1D-4609 Bolt
4 2 4P-5440 Idler Gear As
5 4 1B-4367 Bolt
6 2 4P-5090 Idler Shaft After, the bearing is installed in the gear the bearing must be machined to below size:
1. Diameter of shaft is 81.000 0.010 mm (3.1890 0.0004 inch).
2. The bore in the bearings after machining is 81.060 0.010 mm (3.1913 0.0004 inch).
3. Maximum roughness average ("Ra") is 0.8 micrometer (32 microinch).
7 1 4P-5441 Idler Gear As After, the bearing is installed in the gear the bearing must be machined to below size:
1. Diameter of shaft is 74.990 0.010 mm (2.9524 0.0004 inch).
2. The bore in the bearings after machining is 75.060 0.010 mm (2.9551 0.0004 inch).
3. Maximum roughness average ("Ra") is 0.8 micrometer (32 microinch).
8 1 4P-5437 Gear Shaft
9 4 0S-1595 Bolt Tighten the bolt to 140 10 N m (105 5 lb ft).
- - - The mark on the idler gear must be in alignment with the mark (12) on the crankshaft gear (13). Refer to Illustration 5.