1982/03/22 Caterpillar

Use Correct Torque On Hydraulic Valve Bolts, Nuts And Taperlock Studs{5050}

Usage:

All Machine Hydraulic Systems

Bolts and nuts of hydraulic valves must be tightened to the correct specifications. If tightened more than the specification, distortion of the bore will result, and the inner parts will not operate (move) freely. Also, leakage of fluid from the valve is possible. If tightened less than the specification, the valve will not operate correctly, and leakage of fluid from the valve is possible.

When service work is done on a hydraulic valve, see the Specifications Module of the Service Manual, for the component worked on, to learn the correct torque for the bolts and nuts. The first pages of the Specification Module show standard torques for bolts and nuts used on hydraulic valves.

Use a torque wrench to be sure the torque is correct.

Caterpillar Information System:

1982/03/22 Carbon Build-Up In Combustion And Inlet Areas{1058,1101,1105,1214,1104}

1982/03/15 New Oil Pump Outlet Elbow Is Stronger{3314,3310}

1982/03/15 Use The 6V6059 Microlite With The 6V2196 Inspection Microscope{0651}

1982/03/15 New Diaphragm Used In Fuel Ratio Control{1278}

1982/03/15 More Flexible Hose For Use With Hydraulic Flowmeter{0651,5050}

1982/03/08 Correct Lubrication Procedure Will Prevent Damage To Fan Drive{1359,0374,0375}

1982/03/08 New Adapters And O-Ring Seals Used In Aftercooler Group{1063}

1982/03/08 Heavy Duty Air Cleaner Available, With Precleaner And Automatic Dust Ejector{1051,1055,1061,1062}

1982/03/08 Reconditioning of Bridge Wear Seat Is Permitted; Will Prevent Bridge Replacement When Not Necessary{1100}

1982/03/08 New Double-Wall Fuel Injection Lines Group And Fuel Drain Group Available As Attachments For Protection Against Fuel Leakage{1252,1254,7400}

1982/03/01 New Marine Gear Groups Have New Clutch Plates{3302}

1982/03/01 New Gasket Used In Governor And Fuel Injection Pump Group{1259,1286}

1982/03/22 Engine Replacement{1000}

1982/03/22 Improved Valve Cover Seal Used{1107}

1982/03/22 Use 5P5195 Fuel Line Wrench Correctly{0612,1252}

1982/03/22 Caterpillar Electric Starting Motors{1453,1407}

1982/03/22 Correct Use Of 6V2023 Flow Check Adapter Group Is Important To Prevent Damage To An Engine{0651,0654,1250}

1982/03/22 Use FT1614 Cover To Protect Center Shaft Assembly{0622,3305,3306,3302,3307}

1982/03/22 Improved Plunger And New Spring Used In Mechanical Shutoff Group{7418}

1982/03/29 Parts Book Changes{0374}

1982/03/29 Location Of Sending Unit Changed To Improve Accuracy Of Water Temperature Indication{7453}

1982/03/29 Flywheel Adapters For Dynamometer Testing{1156,0652}

1982/03/29 Multi-Piece Wheel Rims; Caution Must Be Used{4202,4201}

1982/03/29 New Regulator Group Increases Coolant Flow To Cab Heater, Prevents Overcooling{1355}