New Oil Pump Has Improved Relief Valve For Better Pressure Control
Usage:
D348, D349 Engines
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:
1979/05/09 How To Adapt The 5P1759 Tachometer Drive Group (Dealer Tool) To D353 Engines Equipped With Electric Hour Meters When Engine RPM Must Be Checked
1979/05/09 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.
1979/05/09 New " Drive 6V94 Universal Joint Is Available
1979/05/09 Improved Gasket Now Used Between The Flywheel Housing And The Cylinder Block
1979/05/09 New Ring Gears Used In Flywheel Assemblies
1979/04/25 Stronger Output Shaft Now Used In 2N3909 Tachometer Drive Adapter
1979/04/25 During Installation Of Crankshaft Piston Ring Seals, Put Silicone Grease In The Groove And On The Seal
1979/04/25 Dowtherm Test Strips No Longer Available
1979/04/25 New Exhaust Valve Has Improved Three-Piece Construction
1979/04/25 Inspection Of Oil Filters In Parts Stocks
1979/04/25 New Oil Cooler Bonnets Used On 3408 And 3412 Engines
1979/04/25 How To Extend The Service Life Of 1P5550 Fuel Cam Locking Tool Assembly
1979/05/09 Use New Adapter To Make Tests Of 9L6884 Nozzles
1979/05/09 List Of Service Publications
1979/05/09 New Design Exhaust Gasket Used In Air Lines Group
1979/05/09 Change In Part Number Of Water Temperature Regulator Used In Attachment Oil Cooler Groups
1979/05/09 New BrakeSaver Manifold Prevents Oil Leakage
1979/05/23 New 6V116 Water Sleeve Removal Tool Is Available
1979/05/23 New Flywheel Housing Corrects Clearance Problem With Cylinder Block
1979/05/23 New Hose Assembly Will Give Longer Service Life With High Oil Temperatures
1979/05/23 5P3519 Piston Ring Gauge Has Improved Design For Better Accuracy And Easier Use; Corrected Information For Use On Pistons That Have Two Ring Grooves
1979/05/23 How To Prevent Cylinder Block Failure From Cracks
1979/05/23 Do Not Use Later 9N3979 Nozzle Assemblies In Place Of Earlier Nozzle Assemblies
1979/05/23 Shorter Mounting Bolts Used For Glow Plug Wiring