1987/09/14 Caterpillar

Oil Flow Increased For Inlet Valve Lubricator {1105}

Usage:

3606 ( 8RB320-Up ),
3608 ( 6MC255-Up ),
3612 ( 9RC20-Up ),
3616 ( 1PD19-Up ) Engines

The adjustment for the inlet valve metering pump has been changed on the above engines to allow increased oil flow to the inlet valves. Refer to the illustration and the "Flow Adjustment Procedures".

Flow Adjustment Procedure For 3606 Engines

1. Rotate both adjusting screws counterclockwise to full open position.

2. Rotate both adjusting screws clockwise 34 clicks to final position. This will provide an oil flow rate of 1.9 L (.50 U.S.gal.) in a 24 hour period.

Flow Adjustment Procedure For 3608 Engines

1. Rotate both adjusting screws counterclockwise to full open position.

2. Rotate both adjusting screws clockwise 30 clicks to final position. This will provide an oil flow rate of 2.6 L (.69 U.S.gal.) in a 24 hour period.

Flow Adjustment Procedure For 3612 Engines

1. Rotate both adjusting screws counterclockwise to full open position.

2. Rotate both adjusting screws clockwise 20 clicks to final position. This will provide an oil flow rate of 3.9 L (1.03 U.S.gal.) in a 24 hour period.

Flow Adjustment Procedure For 3616 Engines

1. Rotate both adjusting screws counterclockwise to full open position.

2. Rotate both adjusting screws clockwise 11 clicks to final position. This will provide an oil flow rate of 5.2 L (1.37 U.S.gal.) in a 24 hour period.

Location of 7C1190 Metering Pump.

Caterpillar Information System:

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}

1987/09/14 New Turbochargers Have Several Improvements {1053,1066}

1987/09/14 Remanufactured 3208T Economy Truck Engine Available {1000}

1987/09/14 Four More Remanufactured Fuel Pump And Governor Groups Available {1286}

1987/09/14 Remanufactured Air Conditioner Compressor Available {1802}

1987/09/07 New O-Ring Seals Used In Water Lines{1350}

1987/09/07 Be Sure To Correctly Tighten Turbocharger Clamp Assemblies{1052}

1987/09/07 Use The Marketing Publications Information Feedback System{0374}

1987/09/07 Improved Warranty For Remanufactured Parts And Components{7754}

1987/08/31 Metal Protectors Replace Plastic Protectors On Head Studs {1100}

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

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

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

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

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

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

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

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

1987/09/28 New Steel Fuel Injection Pump Lifters Should Not Be Mixed With Aluminum Lifters {1281,1250}

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}