New Crankshaft Main Bearings Used
Usage:
All 3408 Truck Engines
Description of Change: New crankshaft main bearings are now used on all 3408 Truck Engines. The new bearing has a different aluminum alloy layer under the lead tin overlay. This new aluminum layer permits a longer service life after the overlay has been worn away.
Adaptable As: The new 1W6589 Main Bearing is a direct replacement for the 8N5421 Main Bearing on these engines.
The new bearing is in effect with 3408 Truck Engine Serial Number 28V4501.
Caterpillar Information System:
1982/05/19 Use The Correct Brakesaver Seal Group
1982/05/19 Reminder: Check Valve Lash Adjustment At Correct Intervals
1982/05/19 New 6V4950 Injection Line Speed Pickup Group Used With 6V2100 Multitach
1982/05/19 Fuel Rack Slots Have Improved Wear Resistance
1982/03/31 New Diaphragm Used In Fuel Ratio Control
1982/03/31 Use 6V6035 Hardness Tester On Crankshafts
1982/03/31 Engine Storage; Engine Start-up After Storage
1982/03/31 New Adapters And O-ring Seals Used In Aftercooler Group
1982/03/31 List Of Service Publications
1982/03/31 New Piston Pin Retainer Used
1982/03/31 Carbon Build-up In Combustion And Inlet Areas
1982/03/31 Be Sure Your Engine's Performance Is At Its Best With Power Analysis Report (PAR)
1982/05/19 List Of Service Publications
1982/05/19 Inspection Marks On Bearings
1982/05/19 5P4812 Gauge Group Components Available Separately
1982/05/19 Conversion Of 49-State 3406 Truck Engine From 283 Kw (380 Hp) To 298 Kw (400 Hp) Arrangements
1982/05/19 5P3519 Gauge Group Components Available Separately
1982/05/19 Be Sure To Use Correct Water Temperature Regulator
1982/05/19 Lubricant Recommendations Changed For All Caterpillar Engines To Combat Effects Of Fuel Sulfur
1982/05/19 Improved Relief Valve Guide Decreases Maximum Oil Pressure During Cold Weather Starts
1982/05/19 Larger Studs Can Be Used With Rear Exhaust Manifolds
1982/05/19 New Exhaust Tubes And Support Used
1982/05/19 Use Correct Part Numbers For Main And Connecting Rod Bearings
1982/06/23 Fuel Ratio Control Is Now Available As A Group