A cross wrench, also known as a lug wrench or a wheel wrench, is a tool specifically designed for loosening or tightening lug nuts on vehicle wheels. It typically has a cross-shaped design, with four arms that extend outward from a central handle. Each arm of the cross wrench has a socket or a lug nut attachment at its end, which fits onto the lug nuts of the vehicle.
To use a cross wrench:
Position the Vehicle:
Park the vehicle on a flat and stable surface. Engage the parking brake and place wheel chocks or blocks behind the wheels to prevent any unintended movement.
Locate the Lug Nuts:
Identify the lug nuts on the wheel that need to be loosened or tightened. Most vehicles have four or five lug nuts per wheel.
Select the Correct Socket:
Choose the socket or attachment that matches the size of the lug nuts on your vehicle. Cross wrenches usually have different socket sizes on each arm to accommodate various lug nut sizes.
Loosening Lug Nuts:
Insert the socket onto the lug nut and position the cross wrench so that the arm is perpendicular to the ground. Apply firm and steady pressure in a counterclockwise direction (when facing the front of the vehicle) to loosen the lug nut. You may need to use your body weight or step on the wrench handle to provide additional leverage.
Tightening Lug Nuts:
After removing or replacing a wheel, you will need to tighten the lug nuts. Insert the socket onto the lug nut and position the cross wrench so that the arm is perpendicular to the ground. Apply firm and steady pressure in a clockwise direction to tighten the lug nut. Again, you may use your body weight or step on the wrench handle for added leverage.
Repeat the Process:
Repeat the loosening or tightening process for each lug nut on the wheel, working in a diagonal pattern (e.g., loosen or tighten the lug nuts in a star or cross pattern) to ensure even pressure distribution.
Note: It’s important to follow the specific torque specifications provided by the vehicle manufacturer when tightening lug nuts. Over-tightening or under-tightening lug nuts can lead to wheel damage or pose a safety risk.
Cross wrenches are commonly included in vehicle toolkits or can be purchased separately from auto supply stores, hardware stores, or online retailers that specialize in automotive tools and accessories.