G3408 and G3412 Engines Caterpillar

Illustration 1	g00274844
Rear View

Illustration 2	g00270467
View C-C

(1) Install the bearing so the oil hole in the bearing is in alignment with the oil hole in the housing within ± 3 degrees.

Bore in the bearing after installation ... 75.087 ± 0.050 mm (2.9562 ± 0.0020 inch)

Diameter of shaft ... 74.781 ± 0.013 mm (2.9441 ± 0.0005 inch)

(2) Install the bearing so the oil hole in the bearing is in alignment with the oil hole in the housing within ± 3 degrees.

Bore in the bearing after installation ... 31.814 ± 0.052 mm (1.2525 ± 0.0020 inch)

Diameter of shaft ... 31.639 ± 0.013 mm (1.2456 ± 0.0005 inch)

Illustration 3	g00270432
View A-A

(3) Bore in the bearing after installation ... 9.615 ± 0.010 mm (0.3785 ± 0.0004 inch)

Diameter of governor drive shaft ... 9.503 ± 0.013 mm (0.3741 ± 0.0005 inch)

(4) Bore in the bearing after installation ... 19.974 ± 0.025 mm (0.7470 ± 0.0010 inch)

Diameter of shaft ... 18.939 ± 0.013 mm (0.7417 ± 0.0005 inch)

Illustration 4	g00274856
View B-B

(5) Bore in the bearing after installation ... 19.191 ± 0.052 mm (0.7556 ± 0.0020 inch)

Diameter of idler shaft of the magneto ... 19.048 ± 0.013 mm (0.7499 ± 0.0005 inch)

(6) Bore in the bearing after installation ... 18.885 ± 0.025 mm (0.7435 ± 0.0010 inch)

Diameter of shaft ... 18.747 ± 0.013 mm (0.7381 ± 0.0005 inch)

(7) Install the bearing so the oil hole in the bearing is in alignment with the oil hole in the housing within ± 3 degrees.

Bore in the bearing after installation ... 38.138 ± 0.013 mm (1.5015 ± 0.0005 inch)

Diameter of gear ... 37.998 ± 0.013 mm (1.4960 ± 0.0005 inch)

(8) Bore in the bearing after installation ... 16.015 ± 0.013 mm (0.6305 ± 0.0005 inch)

Diameter of shaft ... 15.892 ± 0.013 mm (0.6257 ± 0.0005 inch)

Governor Drive Gear

Illustration 5	g00579452

(1) Torque for four bolts ... 135 ± 7 N·m (100 ± 5 lb ft)

Wheel For Ignition Timing

Illustration 6	g00583178

1. Apply 7M-7456 Compound to the threads on the end of the stud (1) .

2. Tighten the stud (1) .

   Tighten the stud to the following torque. ... 27 ± 4 N·m (20 ± 3 lb ft)

3. Tighten the bolts (2) .

   Tighten the bolts to the following torque. ... 135 ± 5 N·m (100 ± 4 lb ft)