1998/06/01 Caterpillar

Be Sure To Heat The Gear To The Correct Temperature When Installing The Crankshaft Gear{1204}

Usage:

3176 (2YG, 7LG),
3176B (9CK),
C-10 (2PN, 8YS),
C-12 (1YN, 9NS) Truck Engines

References: Specifications, 3176 Truck Engines, SENR3908, "Crankshafts". Specifications, 3176 (7LG) Truck Engines, SENR5107, "Crankshafts". Specifications, 3176B (9CK1-Up) Truck Engines, SENR5560, "Crankshafts". Specifications, C-10 (2PN) Truck Engines, SENR6592, "Crankshafts". Specifications, C-12 (1YN) Truck Engines, SENR6597, "Crankshafts". Specifications, C-10 And C-12 (8YS, 9NS) Truck Engines, RENR1322, "Crankshafts".

The References INCORRECTLY indicate the crankshaft gear should be heated to a maximum temperature of 316°C (601°F) for installation onto the crankshaft. The CORRECT procedure is to heat the crankshaft gear to no more than 210°C (410°F) for no more than 1 hour prior to installation on the crankshaft. Be sure to make note of this information in the referenced Specifications modules.

Caterpillar Information System:

1998/06/01 New Camshaft Gasket Available{1150,1151,1162,1166}

1998/06/01 Timing Hole In Wrong Location In Allison Flexplates{1003}

1998/06/01 New Basic Water Pumps Groups Used In Engine Water Pump Groups{1361}

1998/06/01 New Fuel Injection Nozzle With Higher Valve Opening Pressure (VOP) Used{1254}

1998/06/01 New Guideline For Product Information, SEBF8340, " Fuel Systems Troubleshooting Guide For 3204, 3300, And 3400 Engines With New Scroll Fuel Systems (NSFS)" Available{0374,1250}

1998/06/01 New Longer V-Belt Used For 3126 Truck Engines{1357}

1998/06/01 Cooling System Improved{1350}

1998/06/01 Correct Location For Pressure Tap To Measure Exhaust Backpressure{1061}

1998/05/01 Proper Welding Procedure On Truck Engines With Electronic Controls{1400}

1998/05/01 New Software Released{1920}

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1998/05/01 Do NOT Interchange Electrical Stators Between Electronic Unit Injectors (EUIs) {1290}

1998/06/01 Be Sure To Use The Correct Spacer With The New 152-3001 Injector Hold Down Bolt In Fuel Injection Pump Group{1290}

1998/06/01 New Water Pump Used{1350,1361}

1998/06/01 "Horton 3-Speed Fan" Feature In Heavy Duty Truck Engine Software (FEB98 Or Later){1356,1920}

1998/06/01 Individual Parts For The Exhaust Joint Are Now Available{1059}

1998/06/01 Be Sure To Order The Correct Remanufactured Cylinder Head For 3406E (5EK, 6TS) Truck Engines{1100}

1998/06/01 New Flywheel Housing Gasket Used{1157}

1998/08/01 Prevention Of Air Cleaner Contamination On 1997 And 1998 GMC T-Series Tilt Cab Trucks Powered By 3116 (8WL, 2CW) And 3126B (7AS) Truck Engines{1051}

1998/08/01 Lower O-Ring Seal Removed From Hydraulically Actuated Electronically Controlled Unit Injector (HEUI) Groups{1290}

1998/09/01 Troubleshooting Reminder For Low Power Or Intermittent Low Power Symptoms {1250,1252,1256,1260,1261,1273}

1998/09/01 Flash File Bulletin Board System To Be Discontinued {1920}

1998/09/01 "Programming Cat Electronic Truck Engines" Update {1920}

1998/09/01 New Basic Water Pumps Groups Used In Engine Water Pump Groups {1361}