G3408 and G3412 Engines Caterpillar

Illustration 1	g01413393
Typical example

Illustration 2	g01098054
View A-A

(2) 3N-5723 Spring

Free length ... 104.9 mm to 108.0 mm (4.13 inch to 4.25 inch)

Outside diameter ... 25.27 mm to 25.78 mm (0.995 inch to 1.015 inch)

(1) Adjustment screw

(3) Torque for nut on pilot valve ... 8 N·m (70 lb in)

(4) Flyweight rotation ... Clockwise

(5) 7N-6052 Speed Spring Assembly

Free length ... 44.45 mm (1.750 inch)

Outside diameter ... 24.13 ± 0.25 mm (0.950 ± 0.010 inch)

(A) Piston

Diameter ... 21.803 mm to 21.816 mm (0.8584 inch to 0.8589 inch)

Bore in the bushing ... 21.829 mm to 21.841 mm (0.8594 inch to 0.8599 inch)

(B) Pilot valve lands

Diameter ... 6.325 mm to 6.337 mm (0.2490 inch to 0.2495 inch)

Bore in pilot valve lands ... 6.350 mm to 6.363 mm (0.2500 inch to 0.2505 inch) (C) Diameter of bushing for pilot valve ... 15.847 mm to 15.855 mm (0.6239 inch to 0.6242 inch)

(9) 7W-3625 Buffer Spring

Spring rate ... 2.28 N/mm (13 lb in)

(D) Depth of the counterbore ... 6.680 mm to 6.693 mm (0.2630 inch to 0.2635 inch)

Thickness of gears ... 6.647 mm to 6.660 mm (0.2617 inch to 0.2622 inch)

(E) Bore in oil pump idler gear ... 7.734 mm to 7.747 mm (0.3045 inch to 0.3050 inch)

Diameter of shaft ... 7.709 mm to 7.717 mm (0.3035 inch to 0.3038 inch)

(12) Torque for sleeves ... 40 N·m (30 lb ft)

(13) Opening pressure for the governor oil pump relief valve ... 1200 kPa (175 psi)