CONTROL GP-ELECTRONIC FILTER 1417556 - Caterpillar

3406 (90U),
3406B (6TB) Industrial Engines;
3406B (4TB) Marine Engines;
3406B (2WB, 4RG) Generator Set Engines;
G3406 (4FD) EnginesThe new 6I-0093 Idler Gear Shaft (2) replaced the former 7C-6357 Idler Gear Shaft effective with engine serial number: 2WB104894TB31546TB86544FD2604RG125290U19914
The new 3G-2292 Self-Locking Bolt (1) replaced the 0L-1351 or 030-8535 Bolts effective with engine serial number: 2WB70244TB21096TB57414FD1764RG35490U19797
Location of Bolts (1) and Camshaft Idler Gear Shaft (2).Whenever the engine front housing is removed, check to see which camshaft idler gear shaft is used. If a 7C-6357 Idler Gear Shaft is present, it should be replaced with a new 6I-0093 Idler Gear Shaft (2) and five new 3G-2292 Bolts (1). The following list identifies which engines should be inspected for the 7C-6357 Idler Gear Shaft: 2WB5104-5183, 2WB7835-104884TB1264-1304, 4TB2417-31536TB4231-4298, 6TB6378-86534FD186-2594RG613-125190U19797-19913
Engines equipped with a 4N-0345 or 6I-0093 Idler Gear Shaft (2) require only inspection for bolt type and bolt tightening torque.
The 3G-2292 Self-Locking Bolt (1) is the preferred bolt to secure the idler gear shaft. This bolt has a phosphate and oil finish. The 030-8535 or 0L-1351 Bolts should be replaced with new 3G-2292 Self-Locking Bolts whenever the front housing is removed. The following list identifies which engines should be inspected for the 030-8535 or 0L-1351 Bolts: 2WB1-70234TB1-21086TB1-57404FD1-1764RG1-35390U1-19796
Tighten the new 3G-2292 Self-Locking Bolts to a torque of 55 7 N m (41 5 lb ft).
If the engine suffers overspeed (valve train separation or damage), the front housing should be removed and the camshaft idler gear shaft retaining bolts replaced with new 3G-2292 Bolts.
The effective serial numbers identified are for reference only. The preferred idler gear shafts and/or bolts may already be installed as a result of service replacement action.