1984/05/14 Caterpillar

New Speed Setting Motor Assembly On Woodward PSG Governor Has More Resistance To Moisture And Vibration Damage{1264}

Usage:

All Engines With Woodward PSG Governors And 8N7848 Speed Setting Motor Assemblies

Description of Change: A new speed setting motor assembly is used on the above engines. The new motor assemblies have a metal case around the motor that gives protection from moisture. Formerly, moisture could cause damage to the internal components.

The new motor assemblies also have a more rigid mounting on the cover. This helps prevent damage to the motor assembly that was caused by engine vibration.

Adaptable As: The new motor assemblies are a direct replacement for the former motor assemblies when used with the other parts shown in Chart A.

There are some Woodward PSG Governors that use a 5N3910 Cover Assembly. This cover assembly has a motor assembly that is mounted horizontally for added clearance. These cover assemblies include a cover and a motor assembly which are not serviced separately. Different components, which can be ordered separately at less cost, can be used instead of the 5N3910 Cover Assembly when there is enough clearance above the governor. These new parts are shown in Chart B. See the illustration for the location of these parts.

Location of parts that are used instead of the 5N3910 Cover Assembly.

Caterpillar Information System:

1984/05/14 Gasket Changed For Cylinder Block Side Cover{1201,1362}

1984/05/07 New Recommendation For Oil Hole Location During Installation Of Camshaft Bearings{1211}

1984/05/07 Install Muffler With Drain Hole Down{1062}

1984/05/07 New Hoses In Water Lines Group Give Better Performance At Higher Temperatures; New Hose Clamps Also Used{1050,1059,1350}

1984/04/23 Correct Oil Level And End Play Settings For Marine Transmission{3303,3305,3354}

1984/04/23 Only The External Needle Valve Can Be Adjusted On Woodward EG3P or EG10P Actuators{1265,1289}

1984/04/23 Dimensions For Reconditioning Cylinder Blocks, Cylinder Heads{1201,1101,1103,1105}

1984/04/23 Repair Of Drain Plug Threads In Oil Pan{1302}

1984/04/23 3406 Remanufactured Truck Engines Available{1000}

1984/04/16 Piston For Rectangular Rings Available Again{1214,1215}

1984/04/16 New Oil Filter Base Assembly Used In Filter Base Group{1306}

1984/04/16 How To Recognize And Reduce The Effect Of Moisture On SR4 Generator Windings{4450,4453,4454}

1984/05/14 New Seal For Fuel Injection Pump Housing Is More Resistant To Heat Damage{1253}

1984/05/14 New Valve Assembly And Seal Used In Fuel Transfer Pump{1256}

1984/05/14 Vehicle Electrical System Can Have Power When The Disconnect Switch Is In The Off Positon{0353,1400}

1984/05/21 Improved Cylinder Head Gasket{1101,1201}

1984/05/21 Borescope And Light Source Available For Internal Inspection Of Passages On Most Caterpillar Products{0600,0690}

1984/05/21 Improved Valve Used In Air Starting Lines Groups{1451}

1984/05/21 New Pulley Group With Tapered Bearings{1358}

1984/05/21 Quadrants Improved In Governor Control Groups{1265,1264}

1984/05/21 Different Thread Lubricant Can Be Used On Connecting Rod And Counterweight Bolts{1202,1218}

1984/06/04 Reusability Of Brake Pads{4273,4255}

1984/06/04 Drain Line Added To Reduce Pressure In BrakeSaver Housing{1155}

1984/06/04 Salvaging Cylinder Block Top Decks After Liner Seat Erosion{1201,1216,1217}