1996/01/29 Caterpillar

Shims Or Plates Now Used In Front Suspension Groups To Increase Upper Suspension Cylinder Bearing Life {7201}

Usage:

784B (5RK) Tractors;
785B (6HK),
789B (7EK) Off-Highway Trucks

Reference: Special Instruction SEHS8469, Assembly Procedure For 785 Trucks, Installation of Front Suspension Cylinders (Struts), Page 8.

Reference: Special Instruction SEHS8668, 789 Truck Assembly Procedure,Installation of Front Suspension Cylinders (Struts), Page 7.

Description of Change: Shims or plates are now provided with the front suspension group. The shims or plates are installed between the frame support and the upper suspension cylinder bearing. The shims or plates will increase the service life of the upper suspension cylinder bearing.

Adaptable To: The shims or plates are effective with 784B (5RK18-Up) Tractors, 785B (6HK499-Up) and 789B (7EK371-Up) Trucks. This change is not adaptable to earlier machines (Refer to Note below).

NOTE: The shims should not be needed on the earlier machines, but are adaptable to the earlier machines IF gaps have opened.

Assemble suspension cylinder to the lower mounting. Measure gap with the weight of the machine off the suspension cylinder to determine the number of shims or plates necessary per individual gap. Do NOT force any additional shims or plates into the gap. Use only the quantity necessary. Secure bolts to eliminate any gap left between the frame support and the bearing.

Typical location (1) of 127-7050 Shims (784B Tractor and 785B Truck) or 117-4935 Plates (789B Truck).

Caterpillar Information System:

1996/01/29 Wheel Bearing Adjustment Intervals {4208,4201}

1996/01/29 Lubrication Slots Machined In The End Housing Assembly Of The Planetary Group Provides More Lubrication To The Contact Surface Between The End Housing Assembly And The Ring Gear {3150}

1996/01/29 New Oil Level Gauge Used {1326}

1996/01/22 New Water Temperature Regulator Available{1355}

1996/01/22 Governor Spring Guide Press Depth{1287,1284}

1996/01/22 Tamper Resistant Plugs And Tamper Resistant Bolts Used To Prevent Changes To Fuel Ratio Control (FRC) Setting{1278,1287}

1996/01/22 New Valve Cover Gasket{1107}

1996/01/22 Fuel System Component Information{1254}

1996/01/22 Mixing Caterpillar Long Life Coolant/Antifreeze (LLCA) With Conventional Cat Diesel Engine Antifreeze/Coolant And/Or Other Commercially Available Diesel Engine Antifreeze/Coolants Is Not Recommended{1395}

1996/01/22 Proper Operation Of 24 Volt Radios{7338}

1996/01/22 Improvements To Air Conditioning Hi-Lo Switch{1435,7320}

1996/01/22 Caterpillar Electronic Technician (CAT ET){0700}

1996/01/29 Solenoid Valve Group Now Available For Load Valve Group {5472}

1996/01/29 New Hose Assemblies Used In Turbocharger Oil Lines Groups {1307}

1996/02/05 New Stronger Drawbar Reduces Deformation In Severe Loading Situations{7105,7119}

1996/02/05 New Duo-Cone Seal Retainer And Backing Plate Reduces Oil Leaks In The Service And Parking Brake Group{4251,7561}

1996/02/05 Fuel Injector Sleeve Replacement Tooling{0703,1125}

1996/02/05 Lubricant Used On Cylinder Head Bolts Changed{1100}

1996/02/12 Replaceable Drawbar Wearplate Eliminates Wear On Support Assembly{7105,7119}

1996/02/12 New Pressure Switch Assembly Is Available For Fuel Applications; 9G-8011 Pressure Switch Assembly Should Not Be Used In Fuel Applications {7414}

1996/02/12 New Components Used In Governor And Fuel Pump Drive Group{1288}

1996/02/12 Closed Engine Crankcase Breather System Maintenance And Repair {1317,1107}

1996/02/19 Use Of BIO HYDO Oils in Off-Highway Trucks{3022}

1996/02/19 New Bolts And Washers Used In Rear Axle Spindle To Rear Axle Joint Provides Additional Strength To Prevent Bolt Breakage{3260}