1989/07/03 Caterpillar


Use Same Torque For All Sizes Of Threaded Crown Hydraulic Cylinders{5100,7562}

Usage:


Reference: All Service Manual Specification Modules for threaded crown hydraulic cylinders.

Many hydraulic cylinders use a threaded crown at the rod end instead of the bolt-on head or the threaded gland design. See illustration. A single tightening torque has now been established for the threaded crown on all sizes of hydraulic cylinders.


Typical hydraulic cylinder with the threaded crown design.

The standard torque is 600 ± 130 N·m (440 ± 95 lb ft). Write this new torque in all the Specification Modules for these products.

Caterpillar Information System:

1989/07/03 Air Conditioning Service Tooling{0757,0786,7320}
1989/06/26 New Connector With An Orifice Added To Fuel Injection Lines Groups To Help Prevent Cavitation{1274}
1989/06/26 Damper Groups Improved To Help Prevent Leaks Of Viscous Fluids{1205}
1989/06/26 Change Routing Of Heater Return Hose To Improve Heater Efficiency{7304,1361}
1989/06/26 Air Vent Line Improves Cooling System Performance{1395,1350}
1989/06/19 New Pistons Used With Two Keystone Compression Rings{1156,1205,1214,1215}
1989/06/19 New Seal Used In Auxiliary Water Pump Groups{1361}
1989/06/19 Special Instruction, "Battery Charging Rate And Time Tables," Available On Oil Resistant Paper{0374,1401}
1989/06/19 Identification Of Asbestos-Free Material{0353,0112,0648}
1989/05/29 "CXP Fluids" Are Now "Cat Fluids" {0645}
1989/05/29 Maintenance Inspection Of Emergency Shutdown Systems Required Every 1000 Hours {7400}
1989/05/29 New Extension Assembly Used In Gas Engine Ignition Groups {1558}
1989/07/10 New Viton Rubber Seals Used{1302,1307,1312,1306,1317,1200}
1989/07/10 New, Larger Vibration Damper Improves Wear Life{1205}
1989/07/17 PEEC Training And Diagnostic Training Program Available{0314,0372,1705}
1989/07/24 New Publication Available, "Metal Spray Guide"{0374}
1989/07/24 New Publication Available, "Ultrasonics Guide"{0374}
1989/07/24 Check The Radiator Fan Spider Assembly When Doing Yearly General Maintenance{1356}
1989/07/24 Subscription Service Available For ECAP And DDT Service Program Modules{0782,1705}
1989/07/24 Separate Grounding Of Throttle Limit Switch And Shutoff Solenoid Improves Component Reliability; New Throttle Limit Switch Used{1269,1155,1400}
1989/07/24 Shock Mounts Give Longer Life To 9F3099 Switch Assembly (Starter Relay){1426,1450}
1989/07/24 Engine Oil Coolers With New Rubber End Sheet Available For Parts Service{1378}
1989/07/24 Stronger Spacer Plate Prevents Cracking{1221,1350}
1989/07/24 Improved Control Rod Assembly Used In Fuel Injection Control Groups{1298}
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