New, Tougher Gasket Used Between Block And Front Housing{1151,7555}
Usage:
All 3408, 3408B And 3412 Engines
Description of Change: A new cylinder block gasket is used between the block and front housing on the above engines. The gasket is made of a tougher material that offers greater resistance to wear.
The former gasket material sometimes wore away due to the slight motion between the housing and block during engine operation.
Adaptable As: The new 4W5599 Cylinder Block Gasket is a direct replacement for the former 4N1625 Cylinder Block Gasket. The following chart shows the effective serial numbers for the change.
Caterpillar Information System:
1985/12/09 Service Life Of OEM Primary Fuel Filters{1250,1260}
1985/12/09 A Water Separator Can Help Prevent Fuel Injector Damage If Fuel Is Contaminated With Water{1263,1250,1273}
1985/12/09 New Ratchet Wrenches Available For Tube Fittings{0600}
1985/11/25 Oil Pressure Shutdown Specifications Change For Hydramechanical Shutoff System{1085}
1985/11/25 Canister Size Of Coolant Conditioner Element Has Changed{1350}
1985/11/25 Output Shaft Group Improved{3305}
1985/11/25 New Fuel Ratio Control Group Used On Engines Equipped With New Scroll Fuel System{1278}
1985/11/25 Faster Response Water Temperature Regulators; Service Simplified{1350,1355}
1985/11/18 Filter Added To Drain Hole In Water Pumps{1361}
1985/11/18 Remanufactured Crankshafts Are Available In Standard And Two Undersize Dimensions (U.S. and Canada){1202,7754}
1985/11/18 Bolt Removed From Governor And Fuel Injection Pump Group{1286,1253,1287}
1985/11/11 Two Different Piston Oil Ring Designs Used{1215}
1985/12/16 Troubleshooting Of Jacket Water Heaters{1383}
1985/12/16 Use Care When Handling Turbocharger Compressor Wheels{1052,1077}
1985/12/16 Later 3406B And 3408B Truck Engines Have Higher Minimum Coolant Temperatures{1350,1355}
1985/12/16 Gasket Leakage On Aftermarket Fuel Filters{1261}
1985/12/16 Crankshaft Seal Usage On 3400 Series Engines{1160,1161}
1985/12/16 Improved Clutch Disc And Cooling Oil Flow{3300,3302,3303,3306}
1985/12/16 Bushing Kits Available For Crankshaft Pulleys{1205}
1985/12/16 Pressure Gauge Faces With Tonnage Scales Available For Caterpillar Service Tool Manual And Electric Hydraulic Pumps{0615,0616,0799}
1986/01/13 How To Use Temperature And Pressure Probes With Self-Sealing Probe Adapter Groups{0760,0784}
1986/01/13 Fuel Sulfur Analyzer Available{0651,1280,1318}
1986/01/13 Bracket Added To The Watercooled Exhaust Manifold Group To Help Support Turbocharger{1059}
1986/01/13 New Vee Belt Set Used In Fan Drive Group{1357,1359}