TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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WARNING SUMMARY (Cont’d) • Hydraulic jacks are used for raising and lowering, and are not used to support vehicle. Never work under vehicle unless wheels are blocked and it is properly supported. Injury or damage to equipment may result if vehicle suddenly shifts or moves. • Remove only the inner group of nuts when removing a wheel from the vehicle. Removing the outer nuts which hold the rim together while the assembly is inflated could result in serious injury or death. • In all disassembly of the wheel assembly operations, ensure the tire is totally deflated before removing wheel nuts. Failure to follow proper safety precautions could cause serious injury or death. • Never inflate a wheel assembly with the wheel locknuts removed in an attempt to separate inner and outer rim halves. The assembly will separate under pressure resulting in serious injury or death. • Never use wheel assemblies with studs which are damaged, loose, or have damaged threads. Damaged studs can cause improper assembly, which could cause individual fasteners to fail. Any of these situations could cause serious injury or death. • Never use tubes in wheel assemblies. Use of a tube defeats built-in-safety features, and could allow the wheel to come apart under pressure, resulting in serious injury or death. • Use only replacement parts specified in TM 9-2320-280-24P. Wheels assembled with components which do not meet specifications could cause the assembly to separate under pressure, resulting in serious injury or death. • Never inflate a wheel assembly without having checked wheel locknut torques to ensure the wheel locknuts are tightened to specifications. An assembly with improperly tightened locknuts could separate under pressure resulting in injury or death. • Always use a tire inflation cage for inflation purposes. Stand on one side of cage, during inflation, never directly in front. Keep hands out of the cage during inflation. Inflate assembly to recommended pressure, using a clip-on air chuck. Do not exceed 30 psi (207 kPa) cold inflation pressure. Failure to follow these instructions may result in serious injury or death. • Radial tires and bias ply tires should not be mixed on the same vehicle. Injury to personnel or damage to equipment may result. • Never install radial tire on eight bolt wheel. Damage to equipment may result, causing injury to personnel. • Ensure that during assembly indexing hole on inner and outer rim halves is aligned. Failure to do so may cause damage to equipment or injury to personnel. TM 9-2320-280-20-2 Change 3 c/(d blank)