3406E and 3456 Industrial Engines – Gear Group (Front)

(1) Water pump drive gear

(2) Cluster gear

Apply 9S-3263 Thread Lock Compound to the five bolts for the stub shaft.

Tighten the five bolts for the stub shaft in the following sequence. See Illustration 2 for the numbering of the bolts. … 1, 3, 4, 5, 2, 1, 2, 3, 4, 5, 1

Apply 9S-3263 Thread Lock Compound to the four bolts that fasten the cluster gear to the stub shaft.

Tighten the four bolts that fasten the cluster gear to the stub shaft to the following torque. … 30 ± 7 N·m (22 ± 5 lb ft)

(4) Align the timing mark on the camshaft gear with the timing mark on the front housing when the No. 1 piston is at top center.

(3) Camshaft gear

Lightly lubricate the O-ring seal on the outside of the camshaft sealing plate with a 50/50 mixture of 8T-2998 Lubricant and clean engine oil. Apply 9S-3263 Thread Lock Compound to the three bolts for the camshaft sealing plate.

Tighten the three camshaft sealing plate bolts to the following torque. See Illustration 3. … 12 ± 3 N·m (9 ± 2 lb ft)

Tighten the camshaft bolts in the following sequence. See Illustration 4 for the numbering of the bolts. … 1, 4, 2, 5, 3, 6, 1, 4

Tighten the six camshaft gear bolts to the following torque. … 240 ± 40 N·m (175 ± 30 lb ft)

(5) Adjustable idler gear

Install the plate with the oil groove toward the gear face. Apply 9S-3263 Thread Lock Compound to the three bolts that fasten the adjustable idler gear to the stub shaft.

Tighten the three bolts for the adjustable idler gear to the stub shaft to the following torque. … 30 ± 7 N·m (22 ± 5 lb ft)

Refer to Testing and Adjusting, “Gear Group (Front) – Time” for the backlash adjustment procedure.

Backlash between the camshaft gear and the adjustable idler gear … 0.3556 ± 0.254 mm (0.0140 ± 0.010 inch)

Apply 9S-3263 Thread Lock Compound to the one bolt and five studs for the stub shaft.

Tighten the one bolt and five nuts for the stub shaft to the following torque. … 55 ± 10 N·m (41 ± 7 lb ft)

(6) Air compressor gear (if equipped)

(7) Idler gear

Apply 9S-3263 Thread Lock Compound to the one bolt and five studs for the stub shaft.

Tighten the one bolt and five nuts for the stub shaft to the following torque. … 55 ± 10 N·m (41 ± 7 lb ft)

Apply 9S-3263 Thread Lock Compound to the three bolts that fasten the idler gear to the stub shaft.

Tighten the three bolts that fasten the idler gear to the stub shaft to the following torque. … 30 ± 7 N·m (22 ± 5 lb ft)

(8) Gear for the fuel transfer pump drive

(9) Align the timing mark on the crankshaft gear with the timing mark on the cluster gear.

(10) Crankshaft gear

(11) Oil pump drive gear