1983/11/30 Caterpillar


New Water Temperature Regulator Has Shorter Response Time

Usage:


All 3500 Series Industrial, Generator Set and Vehicular Engines

Description of Change: A new water temperature regulator is now used in the housing and regulator group on the above engines. The new regulator has a shorter response time; the time needed for the regulator to change from open to closed or closed to open is less. The new regulator will more accurately control the jacket water temperature.

The former regulator, which has a much longer response time, can permit the water temperature to become too cool before it closes.

Adaptable As: The new 4W4794 Regulator is a direct replacement for the former 9N2894 Regulator in this application. The new regulator is in effect as shown in the chart.

Caterpillar Information System:

1983/11/30 Improvements Made To Cooling System
1983/11/30 New Valve Lifter Assemblies Used In Valve Mechanism Groups
1983/11/30 Sleeve Can Be Used For Reconditioning The Mounting Bore For The Fuel Pump Housing In The Cylinder Block
1983/11/30 Correct Installation Of New Valve Springs
1983/11/30 Use 6V6070 Tool Group And New Adjustment Procedure For New Scroll Fuel System
1983/11/30 Explanation Of Engine High Idle RPM And Correct Adjustment Of Engine Setpoint
1983/11/30 List Of Service Publications
1983/11/30 New Connecting Rod And Main Bearings Used
1983/11/30 Crankshaft Failures
1983/11/30 New Shafts Used In Fuel Injection Control Groups
1983/11/30 New Air Cleaner Mounting Channel Helps Prevent Failure
1983/10/26 Larger Oil Pump Used To Give Better Clutch Cooling And Bearing Lubrication
1983/11/30 Reuse Of Engine Bearings
1983/11/30 Crankshaft Positions For Injector Timing And Valve Clearance Settings
1983/11/30 New Control Valve Group Corrects Pressure Pulsations
1983/11/30 Several Temperature Detectors Available For 6V6996 And 6V7118 Induction Bearing Heaters
1983/11/30 Additional Remanufactured Water Pumps Available
1983/11/30 Use Of A High Temperature Regulator Will Keep Condensation To A Minimum
1984/01/18 Service Information For Balancers And Dampers
1984/01/18 FT1808 Cable Permits Easier Use Of 6V2100 Multitach To Check Engine Or Alternator RPM
1984/01/18 New Cover And Lever Will Prevent Overtravel Of Valve Spool
1984/01/18 Replacement Valve Guides Can Be Used To Recondition Cylinder Heads
1984/01/18 Dry Exhaust Elbow and Improved Turbocharger Exhaust Seal Help Prevent Exhaust Gas Leakage
1984/01/18 Usage Of Pistons With Rectangular Rings
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