2N4620 Rubber Drive Block Reinstated For Parts Service{3305}
Usage:
3192, 7211, 7221, 7231, 7241, 7251, 7261 Marine Transmissions;
D342, D342C, D333A, D336, D343A, D346, D348, 3406, 3408, 3408B Marine Engines
Reference: Service Magazine; January 9, 1984; Page 7; "Drive Block Retainer Plates Are No Longer Used" for 7231, 7241, 7251, 7261 Marine Transmissions.
The 2N4620 Rubber Block has been reinstated for parts service. The black rubber drive block was replaced by 7T9070 Block made of tan polyester. Both blocks are now available through parts service. There have been complaints from the field of noise and short life with the 7T9070 Block.
Caterpillar Information System:
1990/03/05 Preventive Maintenance (PM) Kits Available For 3116 Truck Engines{7258,0645,1261,1318,1352,7542}
1990/03/05 New Fuel Inlet Fitting Eliminates Breakage; New Screen Used In Inlet Fitting{1250,1252,1261}
1990/03/05 Changing Mounting Position Of 9F3099 And 302266 Magnetic Switches (Relays) May Extend Service Life{1426}
1990/03/05 Do Not Use Lubricant On Sticking Start (Ignition) Switches{1416}
1990/03/05 4C5623 Smoke Candles Can Help Locate Air Leaks in Cab{7301,7325}
1990/02/26 New Inlet/Exhaust Valve With Improved Valve Seat Angle, New Valve Guide, New Cylinder Head Assemblies With New Inlet Valve Seats {1100,1103,1104,1105}
1990/02/26 Welded Crankshafts {1202}
1990/02/26 Improved Head Gasket Used; Service Tips {1124,1216,1221,7568}
1990/02/26 New Water Temperature Regulator Used {1355,1353}
1990/02/26 Improved 1W2076 Cover Used In Fuel Ratio Control Group {1278}
1990/02/26 Resealing Engine Plugs And Fittings; New 5P3413 Pipe Sealant (with Teflon) Available {0649,1100,1200}
1990/02/26 Cat Natural Gas Engine Oil (NGEO) Available For NACD Only {1318}
1990/03/05 New Plug Used In Front Housing For Fuel Injection Control Group{1151,1298}
1990/03/05 New Basic Turbocharger Groups And Cartridge Groups With Improved Compressor Seals, Thrust Bearings, And Hollow Shaft For Reduced Heat Soak{1053,1077}
1990/03/05 New Piston Pin Retainer Used In 3600 Family Of Engines{1214}
1990/03/12 New Loupe (Magnifier) Available For Inspecting Failed Or Broken Parts{0777}
1990/03/12 New Hand-Held Microfiche Reader Available{0354,0374}
1990/03/12 New Rear Gear Group Has Spur Gears Instead Of Helical Gears For Longer Service Life{1204,1206,1212}
1990/03/12 Shorter Bolt Used To Hold Oil Pan Drain Cover{1302}
1990/03/12 Idle Shutdown Timer Used In Auxiliary Power Applications{1705,1706,4267}
1990/03/12 9W2126 Module (Relay Module){7490}
1990/03/19 New Air Conditioner Thermostatic Switches Used {7337}
1990/03/19 Possible Overvoltage Conditions From Output Of VR3 Voltage Regulator {4467,4474}
1990/03/26 New Oil Control Piston Ring Used In 3300 Family Of Engines {1213,1214,1215}