1980/03/24 Caterpillar


New Control Valve Body{1155,1159}

Usage:




3406, 3408 Engines

Description of Change: A new control valve body is used in the BrakeSaver control valve group in 3406 and 3408 Engines. The new control valve body has its lands located so the "to cooler" port is always opened before the "supply" port to the BrakeSaver opens. This will keep the hydraulic oil temperature in an acceptable range. Also, the ports have larger cast dimensions for increased hydraulic oil flow.

Adaptable To: The new 9N6223 Control Valve Body is a direct replacement for the former 9N3685 Control Valve Body, which is canceled.

Caterpillar Information System:

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}
1980/03/24 Crankshaft Rear Seal And Wear Sleeve Are Now Serviced As A Group Instead Of Separate Parts{1161}
1980/03/24 Inspect Regulator Cover Assembly When Overcooling Is A Problem{1350,1380}
1980/03/03 Fuel Heaters Are Now Available For Field Installation{1296}
1980/03/03 Connecting Rod Changes And Replacement Information{1218}
1980/03/03 Spacer Plate Block Group Used For Parts Service Of Block Group With Counterbore Design{1101,1201}
1980/03/24 Different Vibration Damper Now Used{1205}
1980/03/31 Use The 6V200 Hydraulic Wrench To Get Correct Torque Applications On Fasteners In Difficult Access Areas{0612,0623}
1980/03/31 6V2023 Flow Check Adapter Group Is Available{0651,0654}
1980/03/31 Replacement Pinion And Output Gear Available For Service Of Torque Multiplier{0614}
1980/03/31 Remanufactured Short Blocks Are Available For Repairs Of Early 3406 Engines{1201,1101,1102}
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}
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