2024年5月4日发(作者：)

Split Rim Safety Procedures

A 20-inch tire inflated to 100 psi can contain up to 40,000 lbs. of explosive force. That’s enough force to

throw a small car 15 feet in the air, and enough to cause a very serious injury or fatality. Locking rings or

other components may be propelled at speeds up to 130 miles per hour. Split rim wheel assemblies pose

significant “blow-off” risks when inadequate precautions and improper procedures are applied.

Most incidents occur during tire inflation, usually because of over-inflation or improper procedure, or

because of improperly seated, mismatched or damaged tire/wheel components. Below are tips and

resources that you can apply to avoid those dangers.

Before You Get Started

 Ensure employees are trained and equipped to work on the tire / rim assembly.

 Access, understand and apply required inspection and servicing specifications. Some tire

manufacturers offer servicing manuals and videos. Keep these resources handy and available.

 Have the right Personal Protective Equipment – approved safety eyewear, footwear, hearing protection,

gloves (and head protection as appropriate to the work location).

 Have the right tools for the job – improper or insufficient tools increase risks.

 Get the help you need. Light truck tires can be a one-person job; heavier truck tires deserve

assistance from another person, and loader and skidder tires will require mechanical lifting and moving

devices.

 Follow manufacturers' assembly and disassembly procedures.

 Know and respect the Trajectory Danger Zone.

 Let others around you know you are working on a split rim, and evacuate the trajectory zone. Develop

barriers that prevent from entering the trajectory zone.

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Removing / Dis-mounting / Disassembly Procedure

 Before beginning any work on a split rim, inspect the tire and wheel assembly for hazards – bulging

sidewalls, cracked or bent wheel, heavily corroded or damaged ring, unseated lock ring, etc. If it looks

damaged, it may be necessary to pre-cage the assembly.

 Minimize your exposure to the trajectory zone, especially until the tire is deflated. Stand to the side,

out of the way of flying wheel parts in case the unit disassembles explosively.

 Always deflate the tire before removing wheel nuts.

 Deflate tires (both tires in a dual assembly) by first removing the valve core. Insert a wire in the valve

stem to ensure that the stem is not blocked and that the tire is completely deflated before removing

the rim/wheel from the axle.

 Remove the split rim assembly from the axle, and place it on the shop floor.

Two-Piece Solid Rim; Split Ring - LW, FL

1. Make sure the top bead is unseated and below the side ring before attempting to remove it. Insert the

tapered end of the lock ring tool into the notch and pry the side ring out of the rim gutter. Lift wheel

from assembly.

2. Continue to remove the side ring by progressively prying around the rim. Use small bites to prevent

distorting the side ring.

3. Place a tire stand on the rim. Turn the assembly over. Unseat the bottom bead. Remove the tire from

the rim. Remove the tube and flap from the tire.

(see photos on next page)

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