New Oil Pump Has Improved Relief Valve For Better Pressure Control{1304}
Usage:
D348, D349 Engines;
D10, 776 Tractors;
777 Trucks
Description of Change: New oil pump groups are used on the above models. The new pumps have an improved design of the relief valve, which gives better control of pressure at the oil cooler inlet. This permits a more even flow of oil, and prevents pressure surges (high pressures for short intervals) which were possible with the former relief valve.
Adaptable As: Direct replacement when the necessary parts are used together.
Caterpillar Information System:
1979/05/07 An Ammeter Calibration Group Is Now Available{0651}
1979/05/07 Change In Part Number Of Water Temperature Regulator Used In Attachment Oil Cooler Groups{1355,1378}
1979/05/07 Part Numbers Of Bearings To Use For Service Replacement In Fuel Injection Pump Housings For Sleeve Metering Fuel Systems; Correction To Special Instruction For Installation.{1253}
1979/05/07 New Hose Assembly Will Give Longer Service Life With High Oil Temperatures{3314}
1979/05/07 New 6V116 Water Sleeve Removal Tool Is Available{0621,1101}
1979/04/30 New Design Exhaust Gasket Used In Air Lines Group{1061}
1979/04/30 Liner Seat Insert Now Available{1217}
1979/04/30 Improved Gasket Now Used Between The Flywheel Housing And The Cylinder Block{1157,1201}
1979/04/30 Seals (Double-Lip Type) Made Of Viton Material Are Now Used In Vickers Pumps Which Have Steel-Backed Bronze Plates Between Rotor And End Plates{5055}
1979/04/30 New Ring Gears Used In Flywheel Assemblies{1158}
1979/04/30 The Service Life Of A Power Shift Transmission Is In Direct Relation To The Maintenance Of Its Lubrication System{3004,3179,3150}
1979/04/30 2P8316 Dowel Now Available For Parts Service{0652}
1979/05/07 Serialized Attachments Added To Machine Parts Books{0375}
1979/05/14 New BrakeSaver Manifold Prevents Oil Leakage{1155}
1979/05/14 How To Adapt The 5P1759 Tachometer Drive Group (Dealer Tool) To D9H Tractors, 594H Pipelayers And D353 Engines Equipped With Electric Hour Meters When Engine RPM Must Be Checked{0654}
1979/05/14 5P3519 Piston Ring Gauge Has Improved Design For Better Accuracy And Easier Use; Corrected Information For Use On Pistons That Have Two Ring Grooves{0653,1214}
1979/05/14 New Filler Bands Give A Better Seal Between The Cylinder Liners And Cylinder Block{1201,1216}
1979/05/14 Two Fuel Pressure Pumps Are Available To Increase Fuel Pressure{1250,1295}
1979/05/21 Shorter Mounting Bolts Used For Glow Plug Wiring{1403,1412}
1979/05/21 New Flywheel Housing Corrects Clearance Problem With Cylinder Block{1157,1158,1201,1453}
1979/05/21 Do Not Use Later 9N3979 Nozzle Assemblies In Plate Of Earlier Nozzle Assemblies{1254}
1979/05/21 How To Prevent Cylinder Block Failure From Cracks{1201}
1979/05/21 New Washers For Injection Valve Nozzles Must Be Added To Valve Grinding Gasket Kit When Used With Later Engines{7555,1254}
1979/05/21 Rod Bearings For Parts Service Have Reliefs (Grooves) Cut On The Outside Diameter{1219}