1985/10/07 Caterpillar

Check Height Of Locating Dowels Before Installing Cylinder Head{1201}

Usage:

All 3500 Series Engines

There have been reports of incorrect cylinder head installations on 3500 Series Engines. The dowels in the cylinder block (see illustration) must extend 20.0 ± 0.5 mm (.79 ± .02") from the face of the block to locate the cylinder head during installation.

Cylinder block and head installation.

Incorrect cylinder head location (during installation) can cause problems with the intake and exhaust manifolds and uneven wear of the camshaft and lifters. Check dowel height before installing a cylinder head on the above engines. Be sure the cylinder head is positioned over the dowels before the head is lowered onto the block.

NOTE: The dowels can be pushed into the block if they contact the bottom surface of the head during installation.

Caterpillar Information System:

1985/10/07 O-Ring Seal Not Needed On Turbochargers{1052}

1985/10/07 Dust Can Cause Generator Set Vibration{4450}

1985/10/07 Two, New Top Dead Center Magnetic Transducers Available{0651,0653,1214,1250}

1985/10/07 New Water Cooled Exhaust Manifolds Available; Existing Water Cooled Exhaust Manifolds Can Be Strengthened Or Salvaged{1059}

1985/09/30 Conversion Group Available For Increased Power{0600}

1985/09/30 Torque Increase For Cylinder Head Bolts{1101}

1985/09/30 Restarting Engines Without A Fuel Priming Pump{1250,1258}

1985/09/30 Maximum Wear Limits Established For Camshaft Roller Followers{1209}

1985/09/23 List Of Mechanical Service Meters For Earlier 3500 Series Engines Using Mechanical Service Meters{1286}

1985/09/23 New Bleed Screw Used In Fuel Injection Nozzle{1254}

1985/09/23 New Keystone Ring Groove Gauge Available{0763}

1985/09/23 Procedure For Turning Pins And Bushings On Sealed And Lubricated Track{4175}

1985/10/07 Digital Electric Tachometer Group Available{7462}

1985/10/07 Stronger Air Cleaner Support Assembly{1050,1051}

1985/10/14 Fuel Transfer Pump Improved{1256}

1985/10/14 New Fuel Pressure Switch Available{7490,7332,1419}

1985/10/14 "Routine" Mid-Life Roll-Ins Of Main And Connecting Rod Bearings No Longer Recommended{1230,1203,1219}

1985/10/14 Recommendations For Cooling Systems And Cold Weather Operation{1350}

1985/10/21 Use Glycerine On Most O-Ring Seals {7555,1216,1050}

1985/10/21 Cylinder Head And Valve Rocker Arm Brackets Have Oil Supply Passages In A Different Location To Prevent Possible Oil Leakage Into Cooling System {1100,1102,1350}

1985/10/21 Engine Shuts Down Immediately After Start-Up {7400}

1985/10/28 What ROPS/FOPS Certification Means{7323,7325,7264,7266}

1985/10/28 Comparison Of Fuel Timing Tolerances For Field Settings{1250,1251,1281}

1985/10/28 Engine Information Plate Contains More Data; Use Of Performance Specifications{1250,7557}