1987/09/28 Caterpillar

New Steel Fuel Injection Pump Lifters Should Not Be Mixed With Aluminum Lifters {1281,1250}

Usage:

3400 Family Of DIT Engines In All Applications

Description of Change: A steel fuel injection lifter is now used for all applications of the above engines. The improved lifter assembly has a wider, crowned, roller follower that reduces camshaft lobe stress and wear. The steel lifter is also more durable than the former aluminum lifter assembly.

NOTE: Do not mix the new steel lifter assembly with the former aluminum lifter assembly. If an aluminum lifter assembly requires replacement, all remaining aluminum lifter assemblies, plus the washers and springs, should be replaced.

The new steel lifter assembly will increase camshaft life and improve overall reliability of the rebuilt fuel injection pump.

Adaptable To: The new 4W736 Lifter Assembly is a direct replacement for the former 9N2505 Lifter Assembly when used with a 7N1066 Washer and 7N1208 Spring. The new lifter assembly is adaptable to all 3400 DIT Engines.

Caterpillar Information System:

1987/09/28 Either Type Sleeve Satisfactory For Governor Servo Piston {1264}

1987/09/28 Double Lip Seal With Hydrodynamic Grooves Used At Rear Of Crankshaft {1161,1200}

1987/09/28 Thinner Piston Retaining Nuts Are Used In Hydraulic Cylinders {7562}

1987/09/21 New Timing Gear Housing Used In Front Housing Groups To Help Prevent Oil Leaks{1162,1166}

1987/09/21 Single Lip Hydrodynamic Seal Used In Water Pumps{1300,1361}

1987/09/21 New Hydraulic Steering Mounting Group Available{4306}

1987/09/21 New Alternator Used In Charging Alternator Groups{1405}

1987/09/21 New Adapters Available For Metric Test Ports So That SAE Connectors Can Be Used{0784}

1987/09/14 Oil Flow Increased For Inlet Valve Lubricator {1105}

1987/09/14 New Digital Pyrometer Which Incorporates High Exhaust Temperature Alarm Now Used {1606,7412,7450,7466}

1987/09/14 New Piston Cooling Jets Used {1213,1214}

1987/09/14 Mid-Life Bearing Maintenance Recommendations {1203}

1987/09/28 New Special Instruction, "Using the PEEC Screen Map(s)" {0374}

1987/09/28 Engine Oil Coolers Have Rubber End Sheets In Place Of Brazed Sheets {1300,1378}

1987/10/05 Individual Parts Of Caterpillar Hydraulic Gear Pumps Are Available{5073}

1987/10/05 New Product Support Information Available For Electric Power Generation (EPG){4450,0374}

1987/10/05 Replacement Thermostats Available For Jacket Water Heaters{1383}

1987/10/12 Piston And Camshaft Changes{1214,1210,1200}

1987/10/19 Check Plastic Water Sleeve If Engine Experiences Severe Overheating{1380,1350}

1987/10/26 Microfiche For Replacement Engine Bills Of Material {0374,1000}

1987/11/02 Improved Duo-Cone Seal Installers Available{0600,7561}

1987/11/02 Four New Sizes Of Three-Jaw Pullers Available{0700,4050}

1987/11/02 Results Of High Speed And/Or Overspeeding Of 3406B Truck Engines{1105,1209,1210,1214}

1987/11/02 4N3311 Radiator Cap Has Improved Sealing{1382}