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Question

Difficulty: MediumWinter Driving

When chain control conditions are declared on a snowy mountain highway, a commercial driver must install cross tire chains on the drive wheels before proceeding. Arrange the following steps for mounting and securing tire chains in the correct chronological order from first to last.

  1. 1Drape the tire chains evenly over the drive tire with the open hooks of the cross-chains facing outward away from the rubber.
  2. 2Fasten the inner side-rail hook on the back side of the drive tire.
  3. 3Connect the outer side-rail fastener and apply initial tension using the locking cams or tighteners.
  4. 4Drive the vehicle forward approximately 50 to 100 feet at low speed.
  5. 5Stop the vehicle, inspect chain positioning, and perform final retightening on all fasteners and tensioners.

Answer

Drape the tire chains evenly over the drive tire with hooks facing outward -> Fasten the inner side-rail hook on the back side -> Connect the outer side-rail fastener and apply initial tension -> Drive the vehicle forward 50 to 100 feet -> Stop, inspect positioning, and perform final retightening.
Proper tire chain installation requires positioning the chain with hooks outward to protect the tire, securing the inner hook first to establish an anchor, latching the outer side with initial tension, driving forward 50 to 100 feet to seat the cross-links, and stopping for final retightening.

Step-by-Step Solution

1
Drape the chain assembly across the top of the drive tire with cross-chain hook ends facing away from the tire casing.
The chain is centered across the tread with no twists, protecting the casing from puncture damage.
Chains must be properly positioned and oriented before any fasteners are connected.
2
Reach behind the tire and connect the inside side-rail hook.
The inner circle of the chain assembly is anchored securely.
Fastening the inner rail first creates a fixed anchor point that prevents the chain from being pulled over the outside or bunching.
3
Fasten the outer side-rail latch and take up initial slack with tensioning cams or rubber tighteners.
The chain assembly is drawn snug around the tire.
Initial tension prevents the chain from slipping off during initial vehicle movement.
4
Drive the commercial vehicle forward approximately 50 to 100 feet at slow speed.
Tension equalizes across all cross-chains as they seat firmly on the tread.
Vehicle movement under load seats the links and exposes hidden slack points around the wheel circumference.
5
Bring the vehicle to a complete stop and retighten all locking cams and bungee/rubber tensioners.
The chains are locked securely with zero excess play.
Loose chains can strike brake lines, fenders, or mud flaps, causing catastrophic mechanical damage or sudden traction loss.

Key Concept

Commercial Motor Vehicle Tire Chain Mounting and Tensioning Procedure
Estimated Time:1m 30s
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Topics

Winter Driving

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