New Clutch Retraction Pins And Seals{3302}
Usage:
7271 Marine Transmissions
Description of Change: The ahead and astern clutch groups in 7271 Marine Transmissions use new clutch retraction pins and pin seals. The new pin has a full radius head that fits in the piston slot. The full radius head gives more contact area with the piston. This will increase the service life of the transmission at this location. The former pin had corners with chamfers.
The new seal has more resistance to heat and abrasion than the former seal.
Adaptable To: The new 6T2810 Pin and 3P647 Seal are direct replacements for the former 3N6186 Pin and 8M4437 Seal in 3N6195 and 3N6196 Clutch Groups.
The change was in effect on 7271 Marine Transmissions with Serial Number 36W330.
Location of new pin and seal.
Caterpillar Information System:
1983/01/17 Use Caution During Replacement Of Damaged Nozzle Adapters Or Precombustion Chambers{1106}
1983/01/17 Lip-Type Seal Installation On Shafts With Keyways{7555}
1983/01/17 Oil Filter Removal{1318,0611}
1983/01/10 Fabricated Fixture Permits Easier Inspection Of Fuel Injection Nozzles{0626,1254}
1983/01/10 Correct Installation Of Valve Lifter Prevents Problems With Valve Lash Adjustment{1102}
1983/01/10 New Dome Lamp Used{7333}
1983/01/10 Spring Seat Enlarger Available For Use On Cylinder Heads{0663}
1983/01/10 Changes In Engine RPM; Governor Does Not Operate Correctly{1264}
1983/01/10 Water Pump Impellers Can Be Reconditioned{0661,1361}
1982/12/20 New Piston Design Decreases Oil Consumption{1214,1215}
1982/12/20 Replacement Seal Group For Raw Water Pump Shaft Now Has All The Seal Parts Plus An Installation Tool{1371,0622}
1982/12/20 Dimensions For Reconditioning Cylinder Blocks, Cylinder Heads{1201,1101,1103,1105}
1983/01/17 Improved Valve Covers Used{1107}
1983/01/17 New Sealant Used Between The Fuel Injection Pump/Governor Drive Housing And Cylinder Block{1288}
1983/01/17 Improved Mounting Assembly For Speed Switch Contactor Group{7418}
1983/01/17 Disconnect Fuel Lines And Install Caps Before Unit Injectors Are Removed{1274,1254,1251}
1983/01/17 Revision Of Test Specification Tolerance For 1P1795 Master Valve Assembly{0652,1250}
1983/01/17 Parts Service Information For Pistons And Rings{1214,1215}
1983/01/17 Correction To Fuel Injection Test Bench Book, Form SEHS7466{0652,0374}
1983/01/24 Low Manifold Pressure: New Gasket Prevents Air Leakage At Aftercooler{1063}
1983/01/24 Identification Of Exchange Or Reconditioned Components{0610,0351}
1983/01/24 Improved Cylinder Head Gasket{1101,1201}
1983/01/24 Corrections To Product Update Guide (Form PEGP2808) And Engine Update Guide (Form PEGP2811){0374}
1983/01/24 New Expansion Tank And Support Used{1354}