1979/01/08 Caterpillar

Improved Woodward Governor Groups{1264,1289}

Usage:

D348, D349, D353, D379, D398, D399 Industrial and Marine Engines

Description of Change: Two new Woodward Governor Groups are used on the industrial and marine engines shown above. The new governor groups have improvements to the compensation and power pistons, which give better control of "overshoot" (the measure above normal engine RPM when the load is suddenly changed from "full load" to "no load"). The improvements to the compensation and power pistons also increased the compensation adjustment and decreased the governor torque output.

NOTE: The reduction in governor torque output from 8 lb ft (11 N·m) to 5.7 lb ft (7.6 N·m) does not have an effect on engine operation.

Adaptable To: The new Woodward Governor Groups are adaptable to the engines shown in the chart.

Caterpillar Information System:

1979/01/08 New 6V87 Gauge Measures Valve Stem Wear{0653,1105}

1979/01/08 A New 6V29 Sleeve Metering Fuel System Pump Roll Pin Tool Is Used To Adjust And Make A Replacement Of Roll Pins In The Fuel Injection Pump Housing{0626}

1979/01/08 Check The Adjustment Of The Original Tachometer Before A New Tachometer Is Installed{7462}

1979/01/08 Prevention Of Fires On Hydraulic Excavators{7000,5057}

1988/12/26 Remove Fuel From Electronic Control Module (ECM) Before Shipping {1705}

1988/12/26 New Screw Used In BrakeSaver Water Lines Group {1155}

1988/12/26 Check Load Height Before Transporting Machines {7500}

1988/12/19 Do Not Use Heli-Coils® To Repair Rocker Arm Assemblies On 5.4" Bore Engines {1123}

1988/12/19 New Piston Body Assemblies Used {1214}

1988/12/19 Correct Timing Specification {0374}

1988/12/19 Larger Valve Springs Must Be Used With Williams Blue Ox® 485 kPa (70 psi) Exhaust Brake; New Spring Compressor Group Available {1108,1109,1119,0702,0703}

1988/12/19 Check Assembled Dimension For Rack Lever Travel If Governor Housing Assembly Is Replaced {1264}

1979/01/15 5P9705 Tapered Rod Tool Group Used For Removal And Installation Of Piston Pin Bearings In Tapered Connecting Rods{0622,1214,1218}

1979/01/15 Removal And Installation Of Taper Type Bearings{0622,1214,1219}

1979/01/15 6V83 Emery Polishing Paper{0675}

1979/01/22 Current Chart For Dynamometer Adapters{0651,1000}

1979/01/22 New Tachometer Drive Adapter Has Increased Service Life{7462,1288}

1979/01/22 Ether Starting Aid Groups Are Now Available{1456}

1979/01/29 Fuse And Wire Assembly Is Available For Protection Of Earlier 6N5906 Service Meters{7480}

1979/02/05 Federal Law Prohibits Tampering With Noise Control Systems{0116}

1979/02/05 Stronger Suction Bell Assembly Now Used In Engine Oil Lines Group{1318,1307}

1979/02/05 High Sulfur Fuel Can Cause Severe Engine Wear And Internal Damage{1280}

1979/02/19 Use SIRS To Keep Service Literature Current{0374}

1979/02/19 Use Correct Procedure To Clean The Engine Lubrication System If Permanent Type Antifreeze (Ethylene Glycol) Is In The Engine{1318,1350}