1989/05/22 Caterpillar


New Front Crankshaft Seal Requires New Installer Tool {1160,1202,0704}

Usage:


3208 Engines

The lip-type seal on the front of the crankshaft in all 3208 Engines has been replaced by a new seal group. See Illustration 1. The new seal group is a hydrodynamic seal with threads in the sealing surface designed to "pump" or force the oil into the engine as the crankshaft turns. It contains a dust shield on the front side, and therefore the slinger on the damper is no longer used.

Replacement 7C6660 Seal Groups are shipped with an orange polypropylene sleeve installed inside the seal. The sleeve should not be removed from the seal until the damper is installed. Install the new seal dry. The direction of shaft rotation, which must be adhered to for the new seal to function correctly, is marked on the seal case.

The new seal group requires use of an FT2300 or the 4C4234 Front Oil Seal Installer to assure that the seal is installed to the correct depth inside the cover bore. If desired, this installer tool can be made locally. Obtain a 5P4194 Installer Assembly (used for a different front oil seal) and remove the spacer from the installer assembly. Machine this installer as shown in Illustration 2, and stamp "FT2300" on this reworked part. Scratch out "5P4194" previously stamped on the installer assembly.


Illustration 1. New front seal group.


Illustration 2. Making the installer tool for the new seal group. All dimensions are mm (").

Caterpillar Information System:

1989/05/22 Do Not Prefill Secondary Fuel Filter {1261,1290}
1989/05/22 Vibration Measurement System For Caterpillar Products {0781,0783,0784}
1989/05/15 New Installation Procedure For Unit Injectors {1290}
1989/05/15 Front Idler And Accessory Drive Gears Improved {1206,1361}
1989/05/15 New Head Gasket Used {1124}
1989/05/15 New Valve Stem Seal Used On Inlet Valves And Added To Exhaust Valves {1105,1108}
1989/05/15 Automatic Shut-Off Systems Not Recommended On Mobile Earthmoving Equipment {7418,7403}
1989/05/15 Recommended Oils For Filling Bearings During Reconditioning of Track Rollers {4154,4180,0645}
1989/05/08 List Of Seal Installation Tools For Duo-Cone Seals {0700,7561}
1989/05/08 Longer Bolts Give More Life To Gaskets Between Water Cooled Aftercooler Housings {1063,1069}
1989/05/08 New Crankshaft Thrust Plate Made Of Brass {1232}
1989/05/08 New Heavy-Duty Air Cleaner Groups Available {1051}
1989/05/22 Check Valve Added To Fuel Injection Lines {1274}
1989/05/22 New Clamps With Grommets Used In Fuel Lines, Turbocharger Oil Supply Lines, And Turbocharger Water Supply Lines {1274,1307,1380}
1989/05/29 New Upper and Lower Seals For Folded Core Radiators In Cold Temperature Applications {1353}
1989/05/29 New Extension Assembly Used In Gas Engine Ignition Groups {1558}
1989/05/29 Maintenance Inspection Of Emergency Shutdown Systems Required Every 1000 Hours {7400}
1989/05/29 "CXP Fluids" Are Now "Cat Fluids" {0645}
1989/06/19 Identification Of Asbestos-Free Material{0353,0112,0648}
1989/06/19 Special Instruction, "Battery Charging Rate And Time Tables," Available On Oil Resistant Paper{0374,1401}
1989/06/19 New Seal Used In Auxiliary Water Pump Groups{1361}
1989/06/19 New Pistons Used With Two Keystone Compression Rings{1156,1205,1214,1215}
1989/06/26 Air Vent Line Improves Cooling System Performance{1395,1350}
1989/06/26 Change Routing Of Heater Return Hose To Improve Heater Efficiency{7304,1361}
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