SUPPORT 1958038 - Caterpillar

Introduction
Under certain soil conditions, abrasive material will wear the brake calipers. Additional parts are now available to protect the calipers. This publication will show the necessary parts. It will also show the method of installing the protection system.If your machine has been retrofitted with the brake scrapers described in the Special Instruction SEHS9004 the 8R4746 Blocks may remain installed. All other parts installed per that instruction should be removed prior to making this installation.Do not perform any procedure, outlined in this publication, or order any parts until you read and understand the information contained within. If several machines are to be modified, a locating template should be fabricated to expedite installation.Reference: Operation & Maintenance Manual, Parts Manual, and Service Manual.Necessary Parts
The following items are part of and can be ordered as the 4E1454 Service Group Making the Installation
To avoid serious injury or death, never attempt adjustments while the machine is moving or the engine is running unless otherwise specified. Stay clear of all rotating and moving parts. The machine must be parked on a level surface and the engine stopped.
Use AWS E7018 Electrodes or equivalent for all welds.Clean any dried mud and debris from the brake rotors, final drive hubs and the inside of the drive wheels.1. Park the machine on a level surface. Refer to the Operation & Maintenance Manual for the parking procedure.2. Stop the engine. Disconnect the battery ground cable.3. Remove the belt and drive wheel. Refer to the Service Manual for the procedure.
Drive Wheel and Belt are shown in place.4. Install 8R8587 Plate Assembly (1) over the brake head. Position the plate assembly so it is approximately centered over the brake head.
Drive Wheel and Belt are shown in place.5. Bolt two 4E1427 Plates (2) to plate (1) with four 5P2228 Bolts (3) and two 8T4223 Washers (4). Be sure the bleed points at two locations C remain accessible.6. Tack weld each plate (2) across each end (locations [A] and [B]) with a 6 mm (.2 in) fillet weld. The 4E1427 Plates, and the plates they weld to, are made of ASTM A514 Steel.7. Remove bolts (3), washers (4) and plate (1).8. Weld each plate from (A) to (B) with a 6 mm (.2 in) butt weld.9. Bolt plate assembly (1) to plates (2) with four bolts (3) and four washers (4). Leave the bolts loose.
Drive Wheel and Belt are shown in place.10. Bolt 8R8591 Plate Assembly (5) with two 5P2228 Bolts (3) and two 8T4223 Washers (4). Leave the bolts loose. 8R8591 Plate Assembly mounts on the bottom on the right side and on the top on the left side.11. Bolt 8R8594 Plate Assembly (6) with two 5P2228 Bolts (3) and two 8T4223 Washers (4). Leave the bolts loose. 8R8594 Plate Assembly mounts on the top on the right side and on the bottom on the left side.
With the engine running, this machine will spot turn when the steering wheel is turned, even with the transmission in NEUTRAL and the parking brake applied.To avoid