1979/08/27 Caterpillar


New Seal For Precombustion Chamber Has More Resistance To Heat And Steam{1106}

Usage:


518 ( 50S, 55U ) Skidders;
955L ( 85J, 13X ) Loaders;
950 ( 81J ) Loaders;
130G ( 74V, 89Y ),
120G ( 87V ) Motor Graders

Description of Change: A new seal is used on the precombustion chambers in the engines for the above models. The new seal is made of a material which has more resistance to heat and steam than the former seal.

Adaptable As: The new 6V1585 Seal is a direct replacement for the former 7S3206 Seal in this application. The former seal is still available for other uses.

INSTALLATION: Do not use the new 6V1585 Seal in engines that have the precombustion chambers installed under the valve cover. To install the precombustion chamber, put liquid soap on the bore in the cylinder head and on the O-ring seal.


Location of seal.

Caterpillar Information System:

1979/08/27 Why Engines Are Damaged By Fuel Sulfur{1104,1216,1280,1318,1215}
1979/08/20 New Rear Cover And Gasket Used On Water Pump{1361,1350}
1979/08/20 Turbocharger Bearings Are Now Available In More Different Sizes For Better Turbocharger Reconditioning{1053}
1979/08/20 Pump Failure Can Be Prevented{5070,5200}
1979/08/20 Flex Plate Kits Are Now Available For Vickers Vane-Type Hydraulic Pumps{5055}
1979/08/13 Sealant Now Used On Pipe Plugs At The Bottom Of The Oil Filter Base Assembly To Prevent Oil Leakage{1306}
1979/08/13 New Cylinder Head Gasket Has Smaller Diameter Cylinder Openings To Improve Location Of Combustion Seal Ring{1101,1201}
1979/08/13 New 35-Ampere Alternator Used On Some Engines In Caterpillar Equipment{1405,1406}
1979/08/13 6V14 Hydraulic Cylinder Group Now Available{0621}
1979/08/13 5P936 Liner Seat Insert Available For 6.25 Bore Engine Blocks With Counterbores{1217}
1979/08/13 Correct Installation Of Powershift Transmission Is Important{3150,4059}
1979/08/13 New Seal Used Under Retaining Bushing For Fuel Injection Pump Bonnet{1251,1253,1286}
1979/08/27 Steering System Improvements Prevent Possible Damage To Steering Cylinder Sockets{4303,4304,4305,4322}
1979/08/27 New Governor Housing Assembly Used In Governor And Fuel Injection Pump Group{1253,1264}
1979/08/27 6V190 Clamp Is Available For Use On Sleeve Metering Fuel Systems{0626,1250}
1979/08/27 Hardened Washers And Increased Torque Are Now Used On The Bolts Which Fasten The Circle Drive Group To The Circle Drawbar{5207,6153}
1979/08/27 Engine Oil Viscosity Changed To SAE 10W/30 For Shipment From All U. S. Factories{1318}
1979/08/27 New Rocker Arms And Rocker Arm Shaft Have Improved Lubrication{1102}
1979/08/27 New Design Thrust Plate Used In Crankshaft Group{1201,1202,1203}
1979/09/03 Use Caution To Prevent Damage To Plastic Check Valve In Hydraulic Oil Tank And Transmission Oil Tank Drain{5056,3177}
1979/09/03 Only One Dowel Pin Is Now Used To Hold The Thrust Bearing In The Correct Position{1053,1052}
1979/09/03 Follow Recommendations Given In Special Instructions For Modification Of Rollover Protective Structures (ROPS) At All Times{7323,7325}
1979/09/03 Important: Use Only 8N4029 Fan On 769C Trucks And 768C Tractors{1356}
1979/09/03 Quick Disconnect Coupling On Optional Modification Of 5P4150 Nozzle Tester Permits Faster Exchange Of Adapters{0651,1254}
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