New Spider Assembly Used In Suction Fan Group{1356}
Usage:
785, 789 Trucks
Description of Change: A new spider assembly is used in the suction fan group. The blades of the new spider assembly are centered on the spider arms. Formerly, the blades were off center on the spider arms. The new design will reduce vibrations and stress on the rivets that fasten the blades to the hub of the spider assembly. This will help increase the service life of the new spider assembly.
Adaptable To: The new 7E2520 Spider Assembly is a direct replacement for the former 2W1527 Spider Assembly in the 1W5256 Suction Fan Group. The former spider assembly is canceled. The new spider assembly is in effect with 785 and 789 Trucks, 8GB358 and 9ZC284 respectively.
Caterpillar Information System:
1990/02/12 New Air Conditioner Thermostat Switches Used{7320}
1990/02/12 Contaminated Refrigerant Can Cause Air Conditioner Failures{7320,1802,1805,7322}
1990/02/12 Procedure To Charge Air Conditioner Using Receiver Dryer Sight Glass{7320,7322}
1990/02/12 Identification Of Turbocharger And Fuel System Components{1250,1700,1052}
1990/02/12 New Exhaust Manifold Stud Available{1059}
1990/02/12 New Oil Cooler Gasket Has Bead On Only One Side{1378}
1990/02/12 New Mounting Bolts And Washers Used For Propel Motor{4351,7553}
1990/02/12 New Mounting And Cylinder Group, Quick Coupler Group And Lines Group Improve Visibility{5133,5057,6129}
1990/02/12 New Components Used In Positioner And Kickout Group{6107,5109,5112}
1990/02/12 Rework Procedures For The Hydraulic Pump Bias Piston{5070}
1990/02/12 Longer Nipple Prevents Mud From Covering Rear Axle Housing Breather{3260}
1990/02/12 Use Correct Method When Installing Center Bonded Mounts{1273,5056}
1990/02/19 New Turbocharger Guard Assembly Resists Vibration Better{1073}
1990/02/19 Shorter Tube Assembly Stops Hoses From Rubbing In Rear Hoist Oil Lines Groups{5057,5102}
1990/02/19 New Drain Lines Available For Differential Assemblies{3283,5057}
1990/02/19 Clutch Plumbing Kit Increases Cooling Flow And Lockup Pressure For Longer Service Life{5606,6601}
1990/02/19 Improvements Made To Water Pumps; New Groups/Parts Available For Certain Applications{1364,1361}
1990/02/26 Be Sure To Use Correct Plug On Pump Drive Gearbox To Check Oil Level {3108,7500}
1990/02/26 Improved Air Line Routing Reduces Air Dryer Service {4285,1803}
1990/02/26 New Back-Up Ring Reduces Suspension Cylinder Leakage {7201}
1990/02/26 New Water Pump Used In Water Spray System {5612,5614}
1990/02/26 Individual Parts Available For 8C7026 Steering Control Valve {4307}
1990/02/26 New Adjustment Procedure For 9N7980 Automatic Load Controller {5606}
1990/02/26 Caterpillar Parts And Service Information Available On Dealer Computer Terminals (NACD Dealers Only) {0331,0336,0374,0375}