New Plastic Impeller Will Help Improve Service Life Of Water Pump Seal
Usage:
All 3406 Engines
Description of Change: A new water pump group is now used on all 3406 Engines. The new water pump group has a new plastic impeller. This new impeller is lighter in weight, which will decrease the amount of force put on the water pump seal. This will improve the service life of the water pump seal.
Adaptable As: The new 1N2959 Water Pump Group is a direct replacement for the former 2W3277 Water Pump Group. Only the impellers in these two groups have changed. The new 5N7438 Impeller is a direct replacement for the former 2W3276 Impeller.
Caterpillar Information System:
1984/01/18 New Spring And Shaft Used In Governor Control Lever Have Increased Corrosion Resistance
1984/01/18 Stronger Water Cooled Exhaust Manifold Used
1984/01/18 Water Pump Housing Is Now Available For Parts Service
1984/01/18 Mixture Of Inch And Metric Fasteners To Be Used
1984/01/18 Usage Of Pistons With Rectangular Rings
1984/01/18 Dry Exhaust Elbow and Improved Turbocharger Exhaust Seal Help Prevent Exhaust Gas Leakage
1984/01/18 Replacement Valve Guides Can Be Used To Recondition Cylinder Heads
1984/01/18 New Cover And Lever Will Prevent Overtravel Of Valve Spool
1984/01/18 FT1808 Cable Permits Easier Use Of 6V2100 Multitach To Check Engine Or Alternator RPM
1984/01/18 Service Information For Balancers And Dampers
1983/11/30 Use Of A High Temperature Regulator Will Keep Condensation To A Minimum
1983/11/30 Additional Remanufactured Water Pumps Available
1984/01/18 6V4163 Bit And 6V4164 Driver Now Available For Removal Of Bolts For Flyweight Carrier
1984/01/18 Drive Block Retainer Plates Are No Longer Used
1984/01/18 Inspect Camshaft And Lifters After A Failure In The Valve Mechanism Area
1984/01/18 Modification Of Control Panel Gives Different Power Source For Overcrank Timer To Prevent Starter Motor Failures
1984/01/18 Parts Service Information For Pistons
1984/01/18 Smaller Dowel, Stronger Cover Used On Oil Pump Drive Shaft
1984/01/18 Cooling System Conditioner Helps Prevent Cavitation Damage
1984/02/22 Correct Wiring And Fuse Must Be Used For Correct Operation Of Shut-Off Solenoid Group
1984/02/22 Correct Oil Pressure Setting For Marine Transmissions
1984/02/22 Fuel System Manual Bleed Valve Removed
1984/02/22 Housing Assembly Now Has Sleeve To Prevent Housing Damage
1984/02/22 New Water Pump Groups Have Improved Impellers And Shafts