1996/12/16 Caterpillar

Improved Design Of Decking Blade And Trunnion Caps Provide Increased Service Life {6060,6069}

Usage:

525 (1DN) Wheel Skidders

Description of Change: Several design improvements have been made to the decking blade and the blade's support structure. The cell structure of the decking blade has been stiffened, and the torque boxes have been strengthened to increase blade durability. Tubular beam construction is also used for the push arms. These changes will improve the service life of the decking blade under normal operating conditions.

Also, the location of the trunnions for the decking blade have been moved forward on the frame. This change will allow for the additional clearance that is needed for the thicker bearing caps that are now used. The thicker bearing caps use four bolts to secure them in place. Previously, lighter duty bearing caps and two bolts were used.

Adaptable To: This change is effective with 525 (1DN980-Up) Wheel Skidders, and is not adaptable to earlier machines.

(1) Typical locations of the improved blade cell structure. (2) Locations of the four bolts used on each bearing cap. (3) Locations of the thicker bearing caps. (4) Push arms made with heavier tubular beam steel. (5) Locations of the stronger torque boxes.

Caterpillar Information System:

1996/12/16 Improved Relay Switch Assembly Used To Provide Increased Reliability {1423}

1996/12/16 Front Track Roller Improvement Strengthens Weld Joint {4151}

1996/12/09 Tools Used To Remove And Install Both Sizes Of Camshaft Bearings In 3500B Engines{1211,0701}

1996/12/09 124-9057 Guide (Swirl) Collar Quickly Installs Valve Guides To Proper Height{1104,0701}

1996/12/09 Use 6V-7920 Spanner Wrench To Remove And Install 5P-5813 Pinion Nut{3254,4056,0602}

1996/12/09 124-0662 Impact Socket For Removing And Installing Cylinder Head Bolts{1100,0602}

1996/12/09 Brake Release Adapters Used To Disengage Spring Applied Parking Brakes When Towing Is Required{4267,0645}

1996/12/09 Electronic Control Training Aid{0713}

1996/12/09 Thicker 1U-9646 Pusher And 1U-9647 Pusher Make XT-3 Hose Assembly Easier{0684}

1996/12/09 Quickly And Easily Drain Oil Compartments Which Use 106-8186 Drain Valve{3281,0645}

1996/12/09 Remove And Install Threaded Glands On Hydraulic Cylinder Using 9U-7868 Spanner Wrench Group, 9U-7869 Spanner Wrench Group, Eleven Adapter Plates (See Chart B){5456,0738}

1996/12/09 Rotate Crankshaft On 3114, 3116 And 3126 Engines Using 9U-6943 Gear Shaft Housing Assembly Or 9U-7336 Gear Shaft Housing Assembly {1202,0701}

1996/12/16 Speed And Direction Lever Improvements Prevent Seizing {1901}

1996/12/16 Sprocket Segments Can Be Reworked To Allow Proper Torque {4155}

1996/12/16 Spring Force Adjustment Allows Hydraulic Levers To Remain In Detent Position {5051}

1996/12/16 Cab Improvements Reduce Vibration {7266}

1996/12/16 Longer Tie Rods For Control Valve Groups {5051,5124}

1996/12/16 Cab Air Conditioner Group Improvements Eliminate Debris {7320}

1996/12/16 Improved Fuel Sender Assembly Available {7481}

1996/12/23 Longer Bosses Increase Blade Assembly Service Life{5057,6060,6051,6071,7167}

1996/12/23 Service Procedures For Special Application Rollers And Idlers Summarized For Track-Type Troctors{4159,4180}

1996/12/23 Rear Axle Oil Level Raised To Improve Axle Lubrication{3013}

1996/12/23 Grapple Rotator Motor Joint Strengthened{5082,6307}

1996/12/23 Cab Heater Efficiency Improved{7304}