New Piston Ring Group For Parts Service In Natural Gas Applications{1215}
Usage:
G379, G398, G399 Natural Gas Engines
Description of Change: A new piston ring group is available for parts service for G379, G398 and G399 Natural Gas Engines. The new ring group is exactly the same as the former ring group except for the part number.
The former piston ring group was, at one time, used in both diesel and natural gas engines. The diesel engines now use a piston ring group of a different design.
This change prevents the use of the wrong piston ring group in a diesel engine because the common, former ring group is canceled.
Adaptable As: The 1W6055 Piston Ring Group is a direct replacement for the former 9S8973 Piston Ring Group which is canceled.
Caterpillar Information System:
1981/10/05 New Torque Specifications For Flared And O-Ring Fittings{5057,7553}
1981/10/05 Hydraulic Cylinder Repair Stands And Kits Now Available From Caterpillar Parts Department{0623,0626}
1981/10/05 Service Manual Information About Inside Diameters Of Valve Guides{1104,0374}
1981/09/28 Wrong Assembly Or Adjustment Of Governor Linkage Can Cause Failure{1289,1264,1265}
1981/09/28 Oil Pan Drain Plug Has More Threads{1302}
1981/09/21 Lubricant Gives Protection To Camshaft And Roller During Initial Start-Up{1210,1209}
1981/09/21 Use Only EPA-Approved Rack And Idle Setting; Change Seal, Date Plate{1257,1251,1264}
1981/09/21 New Dual Speed Switch Is Now Available{7418,7410,7411,1400}
1981/09/21 Preventive Maintenance For Natural Gas Engine Spark Ignition System{1550,1552,1555,1558}
1981/09/14 Spring Pins No Longer Used In Water Pump Drive Gear {1361}
1981/09/14 Low Idle Instability: New Low Idle Setting {1264}
1981/09/14 Timing Pin Removed From Governor And Fuel Injection Pump Group; Change To Service Manuals {1286}
1981/10/05 Bolt Torque Specifications Changed For Crankshaft Pulley And Power Take-Off Adapter{1205,1165}
1981/10/12 New Cylinder Block Permits Use Of A Small-Frame Turbocharger{1201,1052}
1981/10/12 Use Of Engine Supports On Flywheel Housing Can Change Face And Bore Runout Measurements{1157}
1981/10/12 Engine Slobbering; New Piston And Rings Used{1214,1215,1000,1225,1104,1052}
1981/10/12 FT1561 Cylinder Liner Storage Cabinet{0632}
1981/10/19 FT1565 Valve Guide Removal And Installation Tool{0623,0624,1104}
1981/10/19 Use Shorter Lubrication Periods Under Severe Operating Conditions{7500}
1981/10/19 Wrong Fuel Setting Information Given In Microfiche{0374,1251,1264,1257}
1981/10/19 New Washers Make A Better Seal In Aftercooler Water Pumps{1363}
1981/10/19 Reference Chart For Major Production Changes On 3208 Engines{0374,0375,1000}
1981/10/26 Improved Head Gasket Has Larger Fire Ring To Decrease Fretting {1101,1201}
1981/10/26 "Athena" Supports HBM's Field Servicemen {0374}