1995/08/21 Caterpillar

Driveshaft Dust Cups Now Serviceable{3253}

Usage:

994 (9YF1-Up),
992D (7MJ1-Up),
992C (49Z1-Up, 42X1-Up),
990 (7HK1-Up),
980F Series II (8JN1-Up),
988F (8YG1-Up),
980C (63X1-Up) Wheel Loaders, 826C (87X1-Up),
825C (86X1-Up) Compactors, 824C (85X1-Up) Wheel Tractors

Dust cups are now available for the wheel loaders, compactors and wheel tractors listed in the chart.

Drive shaft spline lubrication

To prevent damage to the dust cups, the drive shaft spline joint should be lubricated every 250 hours, using 2S-3230 Cat Special Purpose Grease (SPG).

The machine must be fully articulated when applying the grease. Overfilling of the grease cavity may result from not having the machine fully articulated.

This overfill will lead to a build up of hydraulic pressure in the driveshaft when the machine is articulated. The driveshaft relief valve cannot compensate for this condition, and hence the dust cap is often forced out of place.

Dust cup installation

Dust cups are installed by pressing them into place. Although welding is not a preferred method, it may be necessary if the end yoke bore was sufficiently damaged at failure.

NOTE: Use care if welding on the driveshaft, as excessive heat may cause deformations in the part, which could reduce its useful life.

Install a new relief fitting when replacing the dust cup.

Caterpillar Information System:

1995/08/21 Low Friction Wear Ring Is Available For The Front Suspension Cylinders To Help Reduce Vibration{7201}

1995/08/14 Remanufactured 3500 Engine Core Return Requirements{1000}

1995/08/14 Piston Usage Chart For Two Piece Pistons{1214}

1995/08/14 New Piston Crown Assembly Used In Piston And Rod Group{1214}

1995/08/14 Wear Sleeve Removal Tooling May "Mark" The Crankshaft{1202,1161}

1995/08/14 New Exhaust Manifold Group Helps Prevent Exhaust Manifold Cracking{1059}

1995/08/14 New Indicator For Hydraulic Charge Filter Prevents Leakage{5068}

1995/08/14 Parts Service Information For Articulated Trucks Equipped With Wide Gears In The Final Drive And A Spacer Between The Wheel Assembly And Planetary Carrier{4055,4051}

1995/08/14 New Components In Water Lines Groups And Aftercooler Group Allow Field Installation Of Variable Speed Fan Clutch Vital Information Management System (VIMS){1380,1063,1359}

1995/08/14 Hood Grill Improved With Enlarged Inserts{7251}

1995/08/14 New Axle Sustains Higher Dynamic Loads{3282}

1995/08/14 Reattaching Grommets To 3E-9167 And 3E-9170 Machine Performance Panels{7490}

1995/08/21 Improved Level Switch Available{7422}

1995/08/21 Recommendations For Inspection And Replacement Of Rubber and Viscous Crankshaft Dampers{1205}

1995/08/21 New Service Repair Camshaft Idler Gear Shaft Available For Use With Cylinder Blocks With Damaged Pilot Bore{1206,1212,1237}

1995/08/28 New Cylinder Head Group Includes Stronger Cylinder Head{1100,1101}

1995/08/28 New Steering Accumulator Charging Valve Group Is Being Used To Improve Service Life{4307}

1995/08/28 Special Instruction SEHS9879 Available For Installing An Air Cooling Coil For The Air Dryer On Articulated Trucks {4285}

1995/08/28 Adding Vibratory Lock Out Function In Vibratory System{1435,3220,5653}

1995/08/28 Modifying Former Exhaust Manifold Sections To Help Prevent Loosening Or Breakage Of The Exhaust Manifold Retaining Bolts{1059}

1995/08/28 New Thicker Exhaust Manifold Gasket Used{1059}

1995/08/28 New And Reconditioned Valve Projection Specifications{1105}

1995/09/04 New High Pressured Turbocharger Groups Reduce Exhaust Leaks{1052,1053}

1995/09/04 New Flexible Hose Assemblies Used In Turbocharger Oil Lines Group{1052,1307}