Correct Hydraulic Tank Breather Must Be Used To Prevent Oil Loss{5056}
Usage:
D20D (9MG),
D250D (6NG) Articulated Trucks
If a 2U-7441 Breather, part of the 7U-9222 Hydraulic Tank Group, is not used on the D20D and D250D Articulated Trucks, hydraulic oil will be lost through the breather when the body is being lowered. The 2U-7441 Breather requires 15 kpa (2 psi) to open the breather.
If a 7U-7613 Breather, which requires no pressure to open, is used instead of a 2U-7441 Breather, oil will spill from the breather when the body is being lowered.
Caterpillar Information System:
1994/11/14 Hydraulic System Instability In The Hoist Second Stage Can Be Eliminated{5051,5057}
1994/11/14 New Precleaner Base Provides Better Seal Around Air Filter Inlet Port{1050}
1994/11/14 New Stronger Muffler Assembly Available For Part Service{1062}
1994/11/07 New Stiffer Tube Assembly Used In Air Compressor Lines Group{1803,1380}
1994/11/07 Two New Manifold Sections Used In Upper Water Lines Group{1380}
1994/10/31 New Arm Assembly Used In Belt Tightener Groups{1358}
1994/10/31 Verification of Connecting Rod Eye Bushing Retention When Overhauling Engines{1218}
1994/10/31 New Piston Crown Assembly Used In Piston Group{1214}
1994/10/31 Using The Correct Air Conditioner Compressor Oil{1802,7320}
1994/10/31 New Instrument Panel Groups With Improved Light Bulb Retention Can Be Installed{7451}
1994/10/31 Wear Limits For Steering Linkage Ball Studs {4329,4318,4305}
1994/10/24 Automatic Ether Starting Aid Systems And Engines Equipped With Electronic Unit Injection (EUI){1456}
1994/11/14 New 24 Volt Halogen Lamp Groups And Lamp Guards Available{1429}
1994/11/21 New Oil Cooler Group{1374}
1994/11/21 New Air Dryer Check Valve Assembly Used{4285}
1994/11/21 New Bearing Housing Used In Turbocharger Group{1056,1052}
1994/11/21 Improved Bracket In Turbocharger Support Group Provides Improved Access To Exhaust Bypass Group (Wastegate){1073,1057}
1994/11/21 New Tank (Oil Saver) Used In Rear Axle Assembly{3260}
1994/11/21 Wheel Bearing Check And Adjustment Maintenance Interval {4208}
1994/11/21 New Speed/Timing Sensor Provides Parts Commonality For Electronic Unit Injector (EUI) Engines{1907}
1994/11/21 3054 And 3056 Machine Engine Fuel Injection Pump Service{1251}
1994/11/28 Fixture Can Be Used To Simplify Challenger Radiator Support Installation.{1353}
1994/11/28 Radiator Mounting Bolt Damage{1353}
1994/11/28 New Front Axle Shims Make Adjustment Easier{3250}