Visual Inspection Can Detect Chrome Plated Engine Valves{1105}
Usage:
Rebuilt engine valves can sometimes be mistaken for new Caterpillar engine valves. Some engine component rebuilders supply used Caterpillar engine valves that have had their stem diameters built up by a chrome plating process. Close visual inspection of a valve stem near the valve retainer grooves can show an indication of the chrome plating process. This area can have an uneven appearance where the chrome plating ends, see Illustration 1. Valve stems that are not chrome plated will have a smooth appearance as shown in Illustration 2.
Illustration 1. Chrome plated valve stem.
Illustration 2. Valve stem without chrome plating.
Caterpillar Information System:
1985/04/29 Special Pricing On Metric Hand Tools For U.S. And Canada Only{0600,0601,0602}
1985/04/29 Extended Oil And Oil Filter Change Intervals{1300,1318}
1985/04/29 Installing New Copper Bonded Bearings Can Extend Engine Life{1230,1203,1219}
1985/04/22 New Ring (Seal) Used In Clutch Piston{3354}
1985/04/22 FT1953 Gauge For Track Assembly{0600,0760}
1985/04/22 Correct Installation Of Oil Sequence Valves{1304}
1985/04/22 New Camshafts Used In SAE Standard [CCW] Rotation Engines{1200,1210}
1985/04/08 Constant Torque Hose Clamps Available For General Use{7550,7553}
1985/04/08 Track Group Shipping Clamps Are Available Through The Parts Distribution System{4170}
1985/04/08 Make Sure Air Cylinder For Governor Actuation Is Correctly Adjusted{1269}
1985/04/08 Hardened Spacers Help Keep Bolts Tight{1063}
1985/04/08 Changes To Naturally Aspirated Truck Engines For 1985{1000,1200,1214,1218,1250,1251,1254}
1985/05/06 Exhaust Manifolds Now Use Locks And High Temp Bolts{1050,1059}
1985/05/06 New Battery Cable Crimping Die Available{0600}
1985/05/06 New Bearing Housings Available For Turbochargers{1052,1053,1056}
1985/05/06 System To Find Internal Fuel Leakage{1250}
1985/05/06 New Governor Drive Group Has Longer Service Life{1289,1264}
1985/05/06 New Clamp Added To Right Hand Instrument Panel Fuel Filter Differential Lines Group{7451,7456,7450}
1985/05/06 Be Sure Correct Piston Rings Are Used On 3400 Series Engines{1215,1214}
1985/05/06 Remanufactured Fuel Ratio Controls Are Available In U.S. And Canada{1278,7754}
1985/05/13 Hydramechanical Governor Fuel Setting Information{1289,1250}
1985/05/13 New Oil Pressure And Water Temperature Alarm Contactor Group Used{7400,7407,7417}
1985/05/13 Improved Remote Shutoff Group Has New Pressure Control Group{1050,1078,1085}
1985/05/13 Check For Interference Between Water Temperature Regulator And Cylinder Head Bore{1355}