Fig. 4 Using Wheel Dolly to Remove Wheel, Hub and Drum Assembly

TM-5-3820-256-24-4 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
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SERVICE MANUAL FOUNDATION BRAKE GROUP DISASSEMBLY Variations in disassembly procedure may be required as different types of brakes have been used on IH vehicles. Some typical brakes used are single and double anchor cam actuated types as well as wedge type actuated brakes. Refer to the particular Service Manual section for complete details pertaining to wedge-type brakes. The disassembly instructions contained herein have been arranged as follows: Remove Wheel, Hub and Drum Brake Groups with Backing Plate Brake Groups with Spider (Cast Type Mounting Bracket) Detailed information covering disassembly and reassembly of various components such as slack adjusters, brake chambers and brake shoes will be found elsewhere in this section. Remove Wheel, Hub and Drum 1. Position vehicle on floor stands. 2. Release parking brake. If vehicle is equipped with spring brake chambers, chambers should be manually released or "caged" to avoid an automatic application of spring brake chambers while vehicle is being serviced. Refer to proper Parking Brake, Spring Brake Chamber section for detailed instructions covering manual release of spring brake. 3. It may be necessary to back off brake adjustment to obtain enough clearance for drum removal (Fig. 3). 4. Remove brake drum assembly as determined by the type of drum mounting. Two variations will be found in drum-to-hub mounting. a. Inboard mounted drum will be secured to the hub assembly on the brake group side of hub. This type of mounting will apply to all cast wheels and some disc wheels. With this type of drum mounting, the wheel, hub and drum is removed as one assembly (Fig. 4). b. Outboard mounted drums will be secured between the wheel and hub. This mounting will only apply to some disc wheel installations. When outboard mounted drum brake groups are serviced, the wheels are removed, then the drum can be removed without disturbing the hub assembly (Fig. 5). This will eliminate wheel bearing repacking and adjustment. Further identification and service procedures will be found in the Wheels, Rims and Tires section. Fig. 3 Backing Off Brake Adjustment Fig. 4 Using Wheel Dolly to Remove Wheel, Hub and Drum Assembly CTS-4080W - Page 5

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