1980/03/03 Caterpillar

Spacer Plate Block Group Used For Parts Service Of Block Group With Counterbore Design{1101,1201}

Usage:

4.75"
Bore Engines in All Applications

All arrangements of 4.75" Bore engines now use a spacer plate between the cylinder block and cylinder head. The former block had counterbores machined in the top surface for the cylinder liners to fit into.

The former 2P8774 and 2P8776 Service Block Groups with a counterbore design are canceled. The new 6N8127 and 6N8124 Service Block Groups will be used for parts service of the former block groups. On most engines, except the early vehicular engines, either the former counterbore-type head assembly or the spacer plate head assembly can be used with the new block group. The chart shows which service parts to use for each head assembly.

The 6N7725 and 6N7727 Hardware Kits have miscellaneous parts that are necessary for the installation of a new cylinder block group. The 8N6273 and 8N6274 Conversion Kits are needed when a spacer plate cylinder block is used with a counterbore-type head assembly.

A spacer plate in the conversion kit has a passage (slot) that takes the lubrication oil from the new location in the spacer plate cylinder block to the former location in the counterbore-type cylinder head. The conversion kits also have the new type thrust plates for the crankshaft.

Special Instruction Form SMHS7541 gives the procedure to use when the former counterbore-type block must be serviced.

Caterpillar Information System:

1980/02/25 Identification Of Fuel Injection Lines And Nozzle Bodies For Different Combustion Systems{1252,1254}

1980/02/25 Drawings Available For Six Tools Used During Repairs Of Damaged Pin Bores In Two-Piece Booms{6501,0665}

1980/02/25 Plunger Movement Must Be Adjusted When New Rack Shut-Off Solenoid Is Installed{1259}

1980/02/25 Stronger Braces Used Between Air Cleaner And Engine{1051}

1980/02/25 Revision Of Special Instruction Form No. SMHS7267, "Use Of 5P8709 Tool Group For Alignment Of Piston Cooling Jets" Has Important Changes{1307}

1980/02/25 How To Check Operation Of Hydramechanical Shutoffs On D379B, D398B, D399 Engines{7418}

1980/02/11 Use The Correct Water Temperature Contactor{1350,1100}

1980/02/11 Warning: Avoid Use Of Fuel Mixtures Of High Volatility. If You Are Exposed To Such Mixtures, Be Aware Of The Hazards Involved And Take Proper Precautions{1280}

1980/02/04 Real Value Available Through Caterpillar Remanufacturing Programs{0374}

1980/02/04 Change To Gear On Accessory Drive Shaft Assembly Gives Longer Service Life{1207,1206}

1980/02/04 New Cylinder Liner Has Improved Design To Keep Liner Temperatures Lower{1216}

1980/01/28 Oil Drain Hole Added To Spacer Plate Cylinder Block To Permit Use Of Scroll Fuel System{1201,1221}

1980/03/03 Connecting Rod Changes And Replacement Information{1218}

1980/03/03 Fuel Heaters Are Now Available For Field Installation{1296}

1980/03/24 Inspect Regulator Cover Assembly When Overcooling Is A Problem{1350,1380}

1980/03/24 Crankshaft Rear Seal And Wear Sleeve Are Now Serviced As A Group Instead Of Separate Parts{1161}

1980/03/24 New Top Piston Ring Has Plasma-Coated Face{1215}

1980/03/24 8S2252 Carbon Seal Tool Can Be Adapted For Use On 8N7001 Fuel Nozzle Assembly{0611,1254}

1980/03/24 Different Water Temperature Regulators Now Used To Prevent Overheating{1355}

1980/03/24 Visual Inspection Of Main And Connecting Rod Bearings{1203,1219,1230}

1980/03/24 New Fuel Injection Lines And Clamps Prevent Stresses And Contact Which Can Cause Leakage{1252}

1980/03/24 An Increase In Engine RPM Will Extend Vanes In Hydraulic Oil Pump To Start Pump Output{5055,5068}

1980/03/24 New Plugs And Rubber Stoppers For Machines With Sealed And Lubricated Track{4169,4170,4175,0622}

1980/03/24 New Control Valve Body{1155,1159}