1981/08/17 Caterpillar


Plastic Plugs Now Used To Hold Piston Pins In Bendix Air Compressors{1065}

Usage:


All Products Equipped With Bendix Tu-Flo 400, Tu-Flo 500, And Tu-Flo 1000 Air Compressors

Description of Change: Plastic plugs are now used in each end of the piston pins for the above air compressors. The new plugs hold the pin in place better, and prevent possible damage to the cylinder walls. The wire-type pin lock formerly used some times permitted the pin to work out far enough to damage the cylinder walls.

With the change in the piston pin locks, the new piston assembly for the Tu-Flo 400 air compressor is also changed to use three piston rings instead of four. The ring size and design are not changed; only the quantity used per piston. For this reason, the rings in the 1S9875 Piston Ring Kit are not changed and the kit can be used for service repair of either the new or former piston assembly. No change has been made to the rings on piston assemblies for the Tu-Flo 500 and Tu-Flo 1000 Air Compressors, and the 3S916 Piston Ring Kit is still used for these models.

Adaptable As: Each of the new parts is a direct replacement for the respective former part, as shown in the chart. The former parts are canceled. Repair kits are shown in the chart for easy reference.

Caterpillar Information System:

1981/08/17 Improvements To Optional Modification Of 5P4150 Nozzle Tester{0651,1254}
1981/08/17 New Spanner Wrenches Needed To Install Bearings On Marine Transmission Shafts{0622,3300}
1981/08/17 Standard Interval For Oil Changes Now 20,125 Kilometers (12,500 Miles) Or 250 Service Hours{1318}
1981/08/10 New Spacers Used With Larger Valve Springs{1108,1101}
1981/08/10 Different O-Ring Seals Used In Exhaust Gas Recirculation Actuator Group{1080}
1981/08/10 Explanation Of Differences In Timing Advance Information{0374,1250}
1981/08/10 Use Correct Parts In Oil Pressure Relief Valve{1315,1304}
1981/08/10 New Water Temperature Regulator Improves Temperature Control{1355,1354}
1981/08/10 Certification Film Necessary On Engines Adjusted For High Altitude Operation{7557,1251,1257,1264}
1981/08/10 Voltage Converter Assembly Now Available{1400,1410,1561}
1981/08/03 FT1633 And FT1634 Return Cap Assemblies Permit Easier Installation Of Flow Meter Tools{0651,5050}
1981/08/03 New Information System For Engine Gasket Kits{7555}
1981/08/17 O-Ring Seal Materials And Applications: Use Only The Correct Seal For The Specific Installation{7555}
1981/08/17 Comparison And Applications Of Six And Eight Counterweight Crankshafts{1202,1156}
1981/08/24 New Idler Pulley Groups Improve Service Life Of Vee-Belt{1358}
1981/08/24 Troubleshooting The Fuel Ratio Control Group For Low Power Complaints{1278}
1981/08/24 Use Of Different Anti-Seize Compound Prevents Problems With S.O.S. Tests{0680,1203,1218,1219,1225,1226,1227,1230}
1981/08/31 FT1632 Bolt Used During Removal Of Sleeve From Sleeve Metering Fuel System{0621,1251,1253}
1981/08/31 6V3100 Diesel Timing Indicator Group Available To Check Engine/Fuel System Timing And Mechanical Advance During Operation{0653,1206,1156}
1981/08/31 Thrust Washer Used In Pump Housing For Sleeve Metering Fuel System{1253,1286}
1981/09/07 Use Correct Parts In Oil Pressure Relief Valve{1315,1304}
1981/09/07 Plates Can Be Fabricated For Removal Of Spherical Bearings From Hydraulic Cylinders{0651,0623}
1981/09/07 Use Hardware Rack To Keep Small Parts Together During Engine Disassembly And Assembly{0633}
1981/09/07 New Exhaust Gas Recirculation Solenoid Used{1080}
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