New Breather Groups Used
Usage:
D353 Industrial And Marine Engines (46B8330-Up And, 47B4879-Up)
Description of Change: Starting with Serial Numbers 46B8330 and 47B4879, new breather groups are used in D353 Industrial and Marine Engines.
The new breather groups use different breather assemblies which have a 41.28 mm (1.625") opening. The breather assemblies used in the former breather groups have a 25.4 mm (1") opening. All of the other parts are the same.
Because of the larger opening in the new breather assembly, the pressure in the crankcase is less. This lower pressure decreases possible leakage around the crankshaft seals.
Adaptable As: The new breather assemblies are direct replacements for the former breather assemblies as shown in the chart.
Caterpillar Information System:
1980/10/01 Install A New Oil Filter Element, Clean The Oil Lines And The Remote Filter Base; Turn The Engine Until The Oil Gauge Shows Pressure Before Starting A Rebuilt Engine
1980/10/01 Fretting Material Must Be Removed Before Installation Of New Bearings
1980/10/01 Protect Your Reconditioned Or Rebuilt Engines During Start-Up
1980/09/10 New Oil Scavenge Tube Assembly Used In Oil Lines Group
1980/09/10 Special Cup Plugs For Use In Oversize (Larger Than Standard Size) Bores In Valve Rocker Arm Shafts
1980/09/10 6V3025 Battery Cable Repair Kit Now Available{1402,1408,0611}
1980/09/10 New Oil Filter Base Has Larger Oil Passages; Some Bases Need Modification
1980/09/10 6V2119 Profile Tool Group Is Available For Inspection Of All Crankshafts In Caterpillar Engines
1980/09/10 CAUTION: Procedure For Adjustment Of Fuel Rack Setting On Hydramechanical Governors Has Been Changed
1980/09/10 Reference List Of Pistons Used With The Different Types Of Connecting Rods
1980/09/10 6V2086 And 6V2087 Seal And Wear Sleeve Installers Available
1980/09/10 Cartridge Repair Kit Available For AiResearch Turbochargers
1980/10/01 Woodward 2301 Speed Control (8N1731 Speed Control Group) Can Be Adapted For Use As Field Test Instrument
1980/10/01 List Of Service Publications
1980/10/01 Some Test Procedures And Specifications Changed For 9L6884 Fuel Injection Nozzle Assemblies
1980/10/01 Reverse Flow Check Valves And Check Valves With A Groove Can Not Be Used In Place Of Each Other
1980/10/01 New Timing Advance Weight Used
1980/10/01 6V3071 Seal Guide Keeps Seal In Position During Installation Of Transfer Pump
1980/10/01 Do Not Use Room Temperature Vulcanizer Compounds Or Silicone Rubber Cements On O-Ring Seals In Engines; Do Not Use Too Much As Gasket Material
1980/10/01 Use Starter To Turn Crankshaft For 30 Seconds Or Until Oil Pressure Gauge Shows Pressure, Before Engine Is Started
1980/10/01 Use Only Caterpillar Water Separator Elements
1980/10/22 Understand The Effects Of Extended Oil And Filter Change Intervals
1980/10/22 New Basic Oil Pump Groups Use Hardened Gears For Longer Service Life
1980/10/22 New Tools Available For Installation Of Crankshaft Seals And Wear Sleeves