1980/03/31 Caterpillar

Remanufactured Short Blocks Are Available For Repairs Of Early 3406 Engines{1201,1101,1102}


3406 Industrial, Marine, Truck and Vehicular Engines ( 90U1-2158, 91U1-484, 92U1-5943, 70V1-3144)

Starting with Serial Numbers 90U2159, 91U485, 92U5944 and 70V3145, drilled oil passages are used to permit oil to flow to the rocker arm mechanism. In the earlier engines, the oil flowed around two cylinder head bolts to get to the rocker arm mechanism (see Service Magazine, October 25, 1976, "New Design Prevents Oil Leakage Into Cooling System," Page 5).

Two remanufactured short blocks, which have the later lubrication system for the rocker arm mechanism, are available for repairs of the earlier 3406 Engines. The remanufactured short blocks are available for use in both the precombustion engines and the direct injection engines.

The OR0715 Remanufactured Short Block (precombustion) and the OR0716 Remanufactured Short Block (direct injection) are service replacements for the blocks in engines with Serial Numbers 90U1-2158, 91U1-484, 92U1-5943 and 70V1-3144. Because the remanufactured short blocks have the later lubrication system, additional parts are necessary for installation of the blocks. The necessary parts are shown in the chart which follows.

NOTE: If a 7N1203 Block Group was installed during an earlier repair, it is not necessary to use the additional parts when a OR0715 or OR0716 Remanufactured Short Block is installed. The additional parts will have been installed with the 7N1203 Block Group.

More information about Caterpillar's Remanufactured 3406 Engine Program is available in Technical Partsgram, Form SEBD2062. COSA dealers must check the COSA Remanufactured Products Guidebook only.

Caterpillar Information System:

1980/03/31 Replacement Pinion And Output Gear Available For Service Of Torque Multiplier{0614}
1980/03/31 6V2023 Flow Check Adapter Group Is Available{0651,0654}
1980/03/31 Use The 6V200 Hydraulic Wrench To Get Correct Torque Applications On Fasteners In Difficult Access Areas{0612,0623}
1980/03/24 Different Vibration Damper Now Used{1205}
1980/03/24 New Control Valve Body{1155,1159}
1980/03/24 New Plugs And Rubber Stoppers For Machines With Sealed And Lubricated Track{4169,4170,4175,0622}
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 Fuel Injection Lines And Clamps Prevent Stresses And Contact Which Can Cause Leakage{1252}
1980/03/24 Visual Inspection Of Main And Connecting Rod Bearings{1203,1219,1230}
1980/03/24 Different Water Temperature Regulators Now Used To Prevent Overheating{1355}
1980/03/24 8S2252 Carbon Seal Tool Can Be Adapted For Use On 8N7001 Fuel Nozzle Assembly{0611,1254}
1980/03/24 New Top Piston Ring Has Plasma-Coated Face{1215}
1980/03/31 Caution: Outboard Bearing Must Be Removed From Extended Shaft Of Front Power Takeoff Before The Engine Is Moved{3055}
1980/03/31 Use Correct Cord Assembly With Jacket Water Heaters{1383}
1980/03/31 Modification Of 5P1768 Pointer Assembly Necessary For Use On Some Fuel Injection Pump Housings{1253,0653}
1980/03/31 New Liner Seat Insert For No. 1 And No. 4 Cylinders Of D353 Engines{1217}
1980/04/14 Repair Parts Now Available For 5S2801 Hose Press Group{0624}
1980/04/14 Important: Use Only 12 Volts Direct Current To Boost Start 3208 Truck Engines Equipped With Exhaust Gas Recirculation Systems{1401,1453,1080}
1980/04/14 Dowtherm 209 Full-Fill Coolant{1350}
1980/04/14 Wrong Installation Of Oil Cooler Gasket Can Cause High Oil Temperatures{1378,1306}
1980/04/14 6V2040 Ratchet Adapter Available For Use With Torque Multipliers On Hydraulic Cylinder Repair Stands{0614,0622}
1980/04/21 Main And Connecting Rod Bearings With Cavitation Erosion Can Be Used Again{1230,1203,1219}
1980/04/21 New Filter Elements Are Available For "Fire Resistant Fluid" Hydraulic Systems{5068}
1980/04/21 Crankcase Capacity Increased And New Oil Level Gauges Used; Specifications For Conversion Of Existing Gauges{1318,1302}
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