Manifold Pressure Variation at Full Load/Constant Speed{1058}
Usage:
3406B/C (8TC, 5YG, 4CK, 2EK)
There have been several perceived power complaints as a result of the electronic engine strategy that produces boost and noise changes which drivers foresee as a power problem, when in fact it is not.
Drivers may see a variation in boost when operating electronic engines. This should not be confused with the loss of power. Many drivers relate boost to power, therefore assuming when boost is low, so is power.
This may be a good indicator when operating mechanical engines, but not necessarily with electronic engines due to the electronic control strategy. This change in boost can be best seen at full load at constant speed. The boost pressure may vary three to five psi with everything else being constant.
Caterpillar Information System:
1993/07/12 The Latest "Gas Engine Installation Drawings" Are Available{0374}
1993/07/12 Preventive Maintenance To Reduce Risk Of Stator Failure{1404,4453}
1993/07/12 Improved Voltmeters Available{7450}
1993/07/12 Magnetic Switches (Relays) May Be Intermittent{1400}
1993/07/05 New Cast Iron Inlet Adapter And Impeller For Water Pumps {1361}
1993/07/05 New Water Pump Groups Use Tapered Roller Bearing {1361}
1993/07/05 New Stronger Elbow Used In Marine And Fire Pump Engine Water Lines Groups {1380}
1993/07/05 False Logging Of 100-01 Low Oil Pressure, And 100-11 Very Low Oil Pressure Diagnostic Codes {1902}
1993/06/21 New Cylinder Head Assembly Provides Improved Valve Seat Retention{1100,1103}
1993/06/21 New G3500 Gas Engine Performance Manual Available{0376}
1993/06/21 Measuring "Dynamic Rack" Of Unit Injectors{0780}
1993/06/21 Windshield Washer Jet Nozzle Assembly Available For Parts Service{7306}
1993/07/19 Regulator Assemblies Available To Service Thermostatic Valve Groups{1355}
1993/07/19 Prechamber Rust Removal{1106}
1993/07/26 Compressor Nut Torque For Schwitzer Turbochargers{1052}
1993/07/26 Engine Changes For 350 Hp{1022}
1993/07/26 Diesel Truck Engine Smoke Limits{1250}
1993/07/26 G3400 Engine Performance Manual{0376}
1993/07/26 New Exhaust Manifold End And Center Sections Used In Dry Type Exhaust Manifold Groups{1059}
1993/07/26 Improved Mounting Reduces Vibration To Liquid Level Switch{7470}
1993/07/26 New Flame Arrestor{1050}
1993/07/26 Service Life of Crankshaft Gears Can Be Extended{1204}
1993/08/02 New Tube Assemblies Used In Air Lines Group Allow Greater Movement{1058}
1993/08/02 Maintaining The Proper Coolant Level In The Radiator{1353}