Oil Pressure Shutdown Specifications Change For Hydramechanical Shutoff System{1085}
Usage:
D379, D398, D399, 3508, 3512, 3516 Engines Equipped With A Hydramechanical Shutoff
The hydramechanical shutoff protects the engine from insufficient oil pressure at both low and high engine speeds. The minimum oil pressure specifications for engine shutdown have been changed for both low engine speed and high engine speed. The new minimum oil pressure specifications for engine shutdown are as follows:
... Low engine speed - 105 ± 35 kPa (15 ± 5 psi).
... High engine speed - 170 ± 35 kPa (25 ± 5 psi).
Make note of these changes in the Service Manuals for each of the above engines.
Caterpillar Information System:
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}
1985/11/11 Caterpillar Offers Remanufactured Turbocharged 3208 Engines At Significant Savings{1000,7754}
1985/11/11 Anti-Seize Compound And/Or Grease Not To Be Used On Fuel Pump Bonnet Retaining Bushings{1251}
1985/11/11 New Retaining Rings Used In BrakeSaver Groups{1155}
1985/11/11 Tape Tool Marker Is Available{0600}
1985/12/09 New Ratchet Wrenches Available For Tube Fittings{0600}
1985/12/09 A Water Separator Can Help Prevent Fuel Injector Damage If Fuel Is Contaminated With Water{1263,1250,1273}
1985/12/09 Service Life Of OEM Primary Fuel Filters{1250,1260}
1985/12/09 New, Tougher Gasket Used Between Block And Front Housing{1151,7555}
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}