New Timing Specifications For 3500 Spark-Ignited Engines{1552}
Usage:
New timing specifications are now in effect for 3500 Spark-Ignited Engines. Use these charts when setting spark timing. Note that a fuel gas analysis should be performed to determine actual Btu content of the gas. There are some gases on which these engines cannot operate. Follow the charts for recommended ignition timing based on operating at full load conditions.
LHV-Low Heat Value
NOTE: Contact your Caterpillar dealer for all information relating to timing and the use of field gas and all other gases not included in the chart above.
Caterpillar Information System:
1991/06/03 New Oil Drain Assembly Used; Be Sure To Correctly Tighten Drain Plugs, Port Plugs, And Pipe Plugs In Oil Pans{1302}
1991/06/03 Reference Emissions Graph Helps Determine Oxides Of Nitrogen{1050}
1991/06/03 New Deutsch HD-10® Electrical Connectors Used{1400,1408}
1991/05/27 New Fuel Manifolds And Clamps Reduce Vibration Of Fuel Lines{1252,1702}
1991/05/27 Smaller Connecting Rod Bolt Used In 4W6425 Air Compressor; Use Correct Torque{1803}
1991/05/27 Technical Marketing Information (TMI) System for Commercial Engine Products{0337,0334,0336}
1991/05/27 Expected Future Air Conditioning Service Requirements{7320,1802}
1991/05/20 Correct Testing of Sensing Switches{7400,7402,7422}
1991/05/20 New Speed Setting Clutch Group For 3161 Woodward Governors{1265}
1991/05/20 Two Scavenge Screens Now Used In Scavenge Oil Pumps{1312}
1991/05/20 Replace Camshaft And Install New Lifters If Pitting, Spalling, Or Wear Occurs On Lobes Of 4N0599 And 4N0602 Camshafts In Fuel Injection Pump Groups{1251,1253}
1991/05/20 Procedure To Retain Oil Pump When Pump Mounting Pad On Cylinder Block Is Broken{1201,1304}
1991/06/10 1,1,1-Trichloroethane May Damage Deutsch C-E Electrical Connectors{1400,0645,0785,1450,1550,1900,3168,3225,3418,4294,4323,4450,5485,5700,7400,7450}
1991/06/17 New Three-Ring Pistons And New Rings Used In New Piston And Rod Groups To Provide Improved Oil Control{1214,1215}
1991/06/17 New Seal And Improved Plate Eliminate Leaks In BrakeSaver Water Lines Group{1380,1155}
1991/06/17 Personality Modules For 1991{1902}
1991/06/17 New Gasket Used In Flywheel Housing Cover Group{1157}
1991/06/17 New Top Piston Ring Improves Wear Resistance{1215}
1991/06/24 Air Starter Relay Valve Improved{1462}
1991/06/24 New Flame Arrestor Assembly Used In Flame Arrestor Group{1050}
1991/06/24 New Aftercooler Core Assembly With Increased Corrosion Resistance Available As An Attachment For Landfill Applications{1064}
1991/06/24 Correct Adjustment And Installation Procedure For Engine Speed Timing Sensor{1912}
1991/07/01 New Thermostatic Switches Used In Air Conditioning Systems{7320}
1991/07/01 New Exhaust Manifold Gasket Available{1059}