New Seal Prevents Leakage in Front Suspension Cylinders{7201}
Usage:
776, 776B Tractors;
777, 777B Trucks
Description of Change: A new seal is used to prevent leakage in the front suspension cylinders. The former seal was not tight enough in the groove and could twist or "nibble" during installation. This would permit leakage past the seal at the head and gland areas. The new seal fits tighter around the head and gland to prevent twisting or "nibbling" during assembly.
Adaptable To: The new 5H4909 Seal is a direct replacement for the former 8J8879 Seal in the 4T4756 Front Suspension Group.
Location of seals.
Caterpillar Information System:
1989/12/11 New Seats Provide Improved Ride{7312,7307,7324}
1989/11/27 Hydraulic Brake Lines Use New Tee Fittings{4257}
1989/11/27 Resilient Radiator Mounts And Stronger Side Channels Used{1353}
1989/11/20 Conversion Of Asphalt Spray System From U.S. Gallons To Liters{5615}
1989/11/20 New Bolt and Locknut Used to Hold Baffle Tube Assembly in Hydraulic and Transmission Tank{5056,3154,3177,5057}
1989/11/20 Mud Scraper Plate Assembly Added To Rear Wheel Group To Prevent Damage To Brake Cooling Lines{4251,4208,4234,4257}
1989/11/20 New Motor Assembly Used In Electric Drive Pump Group{4267,4268}
1989/11/20 Adjustment Of Detent Position Of Neutral Start Switch{7415}
1989/11/13 Engine Coolant Can Be Recycled{1395}
1989/11/13 Adjustment Of Operating Clearance For 8C2259 Clutch Assembly{5606,7526}
1989/11/13 New Bolt And Nut Used In Rear Axle Support{3260}
1989/11/13 Improving Brake Response Time{3208,3203}
1989/12/11 New Hydraulic Fittings Used On Blade System To Make Access To A Filter Easier{5057}
1989/12/11 New Articulation Lock{7506}
1989/12/11 Water Spray System Available For Lower Conveyor{5612}
1989/12/11 Additional Information For Checking Valve Camshaft Timing{1105,1110,1112,1121}
1989/12/11 New Camshaft And Lifter Kits Available For Slipper Type Cam Followers (Valve Lifters){1209,1210}
1989/12/11 Modification Of 2W1054 Screen Assembly For Use During Dynamometer Testing{1307}
1989/12/18 Conversion Kits Are Available To Change Speeds Of Winches{5163,5165}
1989/12/18 Field Service Update Kit Now Available For Suspension Seat{7312,7307,7324}
1989/12/18 Stronger No. 4 Clutch Housing Used In Transmission{3169}
1989/12/18 New Wiper Motor Group, Arm And Shaft Assembly Used In Windshield Wiper Group{7305}
1989/12/18 New Electronic Height Sensor For Suspension Control{7215}
1989/12/18 Procedure For Testing Electrical Displacement Control On Hydraulic System Ground Drive Pump{5070,5700,1400}