New Torque Specification Used On Bolts That Hold The Cylinder Head{1101}
Usage:
D330C, D333C, 3304, 3306 Engines
Description of Change: A new torque for the bolts that hold the cylinder heads for the above engines is increased from 175 ± 5 lb ft (240 ± 7 N·m) to 185 ± 12 lb ft (250 ± 17 N·m). This will prevent possible coolant leakage at the cylinder head gasket. During installation of a cylinder head on any of the above engines, be sure to use the new torque value. The minimum amount of torque on the head bolts must not be less than 150 lb ft (203 N·m) after engine tests.
Make a note of the torque value change in your Service Manual for the specific engines until a revision of the Service Manuals is made.
Caterpillar Information System:
1978/09/04 New Vent Tube For Water Cooled Turbocharger{1380,1052}
1978/09/04 New Camshaft Rear Bearing For The Sleeve Metering Fuel System{1253}
1978/08/28 Different O-Ring Seals Now Used In Fuel Injection Pump Group{1251}
1978/08/28 New Oil Supply Line And Gasket For Turbocharger{1307,1052}
1978/08/28 New 5P8744 Adapter Assembly And Special Instruction Procedures For 5P4150 Nozzle Tester Group{0650}
1978/08/28 New Design Seals Decrease Shaft Wear In Fuel Transfer Pump{1256}
1978/08/28 Change In Procedure To Check Main Bearing Clearance{1203}
1978/08/28 A New Ram Support For Use With The Field Service Hose Press{0623}
1978/08/28 Tips For Service Information Retrieval System (SIRS) Users{0374}
1978/08/21 Improved Piston Pins Are Made Of Different Material For Better Hardness Characteristics When Heat Treated{1214}
1978/08/21 Improved Guide Pin For Fuel Injection Pump Lifters{1251}
1978/08/21 Sleeve-Type Ring Compressors Can Be Used For Installation Of Pistons From The Bottom Of The Engine{0622}
1978/09/04 Correct Procedure To Adjust Front Power Takeoff Clutches{3055}
1978/09/04 New Gasket Used In Exhaust Manifold Group{1059}
1978/09/04 New Nozzle Assembly Used In Fuel Injection Valves{1254}
1978/09/04 New Water Pump Gives More Pressure{1361}
1978/09/11 New Drive Adapters For Fuel Injection Test Bench{0650}
1978/09/11 New Diaphragm Used In Mechanical Shut-Off Groups Has Identification For Correct Installation{7418}
1978/09/11 Correct Installation Of Crankshaft Thrust Plates Is Very Important To Prevent Engine Damage{1203}
1978/09/18 Tips For Service Information Retrieval System (SIRS) Users{0374}
1978/09/18 Permanent Installation Quick Disconnects For Pressure Testing Now Available{0651}
1978/09/25 New Springs Available For Forward And Reverse Clutches, And New Tool To Correctly Position The Clutches Of Twin Disc MG514 Marine Transmission{3302,0626}
1978/09/25 Use New 6V22 Tool Group To Make Replacement Of Worn Governor Spring Guides{0620}
1978/09/25 Tips For Service Information Retrieval System (SIRS) Users{0374}