Figure 5. - Cross Section of Inboard and Outboard Mounted Drum

TM-5-3820-256-24-5 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
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WHEELS, RIMS AND TIRES Figure 5. - Cross Section of Inboard and Outboard Mounted Drum PRECAUTIONS Always loosen rim clamps before complete removal of nut from stud (cast spoke wheels). With loosened nuts on stud, strike clamps with a heavy hammer and be sure each clamp is loose. Always deflate tires completely before removing locks or side rings. Always inspect and clean all parts before assembly. Always inflate tires in a safety cage. Always use a "clip-on" air chuck with remote control valve to inflate tires. Never strike cast spokes of wheel assembly when loosening rim clamps. Never mix rim side rings or lock rings of different types or size. Never use cracked, bent or badly rusted parts. Never reinflate flat tires on vehicle - use the spare. Never add air until certain each side or lock ring is fully seated. Never hammer side or lock ring on a partially or fully inflated tire. When installing the tire and rim assembly on disc braked axles, make sure the tire valve stem clears the brake caliper. The use of an I.H. valve stem retainer or tire manufacturer’s stem-forming tool are the only acceptable methods of obtaining clearance when necessary. REMOVE AND REINSTALL When servicing wheels, different procedures will be required for particular service applications. Examples: Tire service will require removal of wheel and tire on vehicles with disc wheels. On vehicles with cast spoke wheels, tire and rim assembly will be removed for tire service. Brake service (except disc brakes) will require different procedures depending upon inboard or outboard mounted drums. A. Vehicles with cast spoke wheels or disc wheels and inboard mounted brake drums (single or dual tires): remove wheel, hub and drum as an assembly. B. Vehicles with disc wheels (single or dual tires) with outboard mounted brake drums: remove wheel or dual wheels. Then remove brake drum leaving hub assembly intact on vehicle. Wheel bearing service will not be required with this application. Refer to the GENERAL topic for further identification of wheels and to application of inboard and outboard mounted drums. When installing wheel, hub and drum assemblies, refer to the following: WHEEL BEARING ADJUSTMENT, WHEEL SEALS, and WHEEL BEARING. CTS-4148A Page 4

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