1979/05/14 Caterpillar

Two Fuel Pressure Pumps Are Available To Increase Fuel Pressure{1250,1295}

Usage:

All 3208, 3304 and 3306 Engines With Sleeve Metering Fuel System

SUPPLEMENT: 06/18/79

SERVICE MAGAZINE, MAY 14, 1979, PAGES 5 and 6. In the article "Two Fuel Pressure Pumps Are Available To Increase Fuel Pressure" the part number shown for the check valve is wrong. Change "1P2268 Check Valve" to read "1P2298 Check Valve".

--------------- END SUPPLEMENT ---------------

Description of Change: Two fuel pressure boost pumps are now available for use in the above engines. Pumps are available for either 12 or 24 volt electrical systems. The boost pump will give a positive pressure in the suction side of the sleeve metering fuel system.

Because pressurized fuel is supplied to the suction side of the sleeve metering fuel system by the boost pump, engine performance will be effected less by long suction fuel lines, fuel lines and fuel filter restrictions and excessive (too much) fuel lift. With pressure instead of a vacuum in the suction side, air can not get in at the fuel line couplings.

Adaptable To: The new parts shown in the chart are adaptable to all 3208, 3304 and 3306 Engines. A Special Instruction, Form No. SMHS7468 is sent with each pump group and has complete information for installation of the new pump groups. A 1P2298 Check Valve is available for parts service of the 6N6 Pump Assembly and the 9N5459 Pump Assembly.

Caterpillar Information System:

1979/05/14 New Filler Bands Give A Better Seal Between The Cylinder Liners And Cylinder Block{1201,1216}

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 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 New BrakeSaver Manifold Prevents Oil Leakage{1155}

1979/05/07 Serialized Attachments Added To Machine Parts Books{0375}

1979/05/07 New Oil Pump Has Improved Relief Valve For Better Pressure Control{1304}

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}

1979/05/21 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}

1979/05/28 9S8100 Tool Group Changed To Use With Fuel Transfer Pump Only{0622}

1979/05/28 A New Method To Clean And Polish Engine Valve Stems{0674,1105}

1979/05/28 Seat Belt Maintenance{7327}

1979/05/28 New Type Products Available To Clean Cooling Systems{1350}

1979/05/28 Correct Locations To Connect Gauges For Checks Of Engine Oil Temperature And/Or Pressure{7455,7450,1300}

1979/06/04 New "L-Shaped" Clutch Plates Now Used{3302}