Lock Screw For Threaded Crown On Hydraulic Cylinders No Longer Used{5000}
Usage:
All Caterpillar Products So Equipped
The lock screw for the threaded crown on hydraulic cylinders is no longer used at the factory. See the illustration. This screw was originally used to hold the crowns in place. Reports show that it is possible to push the head of the cylinder out of alignment with the cylinder bore when the screw is tightened. This can cause scoring (deep scratches) of the cylinder rod. Removal of this screw will not cause the crown to loosen. Remove the lock screw from the crown on all cylinders as they are serviced.
Location of lock screw in the crown.
Caterpillar Information System:
1982/04/12 Use Correct Part Numbers For Main And Connecting Rod Bearings{1230,1203,1219}
1982/04/12 Pressure Regulator Group Now Available For Parts Service{3152,3185,3166,3012}
1982/04/05 Reminder: Check Valve Lash Adjustment At Correct Intervals{1102}
1982/04/05 Conversion Of 49-State 3406 Truck Engine From 283 kW (380 hp) To 298 kW (400 hp) Arrangements{1000}
1982/04/05 Lubricant Recommendations Have Been Changed For Vehicular Products{0680,0374,0375,3004,1318,5060}
1982/03/29 Twisted Port Plate Can Cause Excessive Case Drain From Piston Pump Or Motor{5058,5070}
1982/03/29 New Regulator Group Increases Coolant Flow To Cab Heater, Prevents Overcooling{1355}
1982/03/29 Multi-Piece Wheel Rims; Caution Must Be Used{4202,4201}
1982/03/29 Flywheel Adapters For Dynamometer Testing{1156,0652}
1982/03/29 Location Of Sending Unit Changed To Improve Accuracy Of Water Temperature Indication{7453}
1982/03/29 Parts Book Changes{0374}
1982/03/22 Improved Plunger And New Spring Used In Mechanical Shutoff Group{7418}
1982/04/12 Make Sure Hydraulic Pumps Are Installed Correctly{5055,5070,5073}
1982/04/12 New Seals Improve Pressure Regulator Group{3185,3012}
1982/04/12 Use Correct Size Bolt To Install 5P9736, 6V2156 Or 6V2157 Link Brackets{0644}
1982/04/19 Improvements Made To 6V3000 Sure Seal Repair Kit{0611,1408}
1982/04/19 New Broken Link Spring Used In Governor{1264}
1982/04/26 Improved Relief Valve Guide Decreases Maximum Oil Pressure During Cold Weather Starts{1315,1304}
1982/04/26 Expansion Tank Changed To Permit Installation Of Water Level Gauge{1354,7470}
1982/05/03 6V4960 AC Current Probe Will Measure Current Easier{0652}
1982/05/03 Use New Special Instruction To Install 5P6595 Insert In Cylinder Liner Seats{1216,0621}
1982/05/03 New 6V4950 Injection Line Speed Pickup Group Used With 6V2100 Multitach{0651}
1982/05/03 Lubricant Recommendations Changed For All Caterpillar Engines To Combat Effects Of Fuel Sulfur{1318,0375,0374,1280}
1982/05/03 Use New 6V4910 Clamp-On Ammeter For Easier Electrical Current Measurement{0651}