00-8 SERVICE INFORMATION PROBLEM POSSIBLE CAUSE CORRECTION Cracked or Broken Wheel Discs (Cracks Develop in the Wheel Disc from Handhole to Rim, or from Handhole to Stud) Metal fatigue resulting from overloading. Replace wheel. Check position of wheel on vehicle for working load specifications. Damaged Stud Holes (Stud Holes Become Worn, Elon- gated or Deformed, Metal Builds up Around Stud Hole Edges, Cracks Develop from Stud Hole to Stud Hole) Loose wheel mounting. Replace wheel and check for: • Installation of correct studs and nuts. • Cracked or broken studs — replace. • Worn hub face — replace. • Broken or cracked hub barrel — replace.
• Clean mounting surfaces and retorque cap nuts periodically. • Rust streaks fanning out from stud holes indicate that the cap nuts are or have been loose. Damaged Stud Threads Sliding wheel across studs during assembly Replace stud following proper wheel instal- lation. Loose Drum Improper drum bolt. Replace with proper length bolt. Loose Inner Wheel 1. Excessive stud standout from mounting face of hub allowing wheel nut to bottom out. 2. Improper torque. 1. Replace with proper length bolt. 2. Use recommended torque procedure. Broken Wheel Studs 1. Loose cap nuts. 2. Overloading. 1. Replace stud and follow proper torque procedure. 2. Replace stud. Tire Slippage on Rim 1.
Improper storage or operating condi- tions. 2. Poor maintenance. 3. Rust, corrosion on bead seating. 4. Loss of pressure. 1. Correct as required. 2. Follow proper maintenance procedures. 3. Correct as required. 4. Follow proper maintenance procedures. Tire Mounting Diffi- culties 1. Mismatch tire and rim sizes. 2. Defective or mismatched rings for rim use. 3. Overinflation of tires. 4. Corrosion and dirt. 1. Correct as required. 2. Correct as required. 3. Follow recommended tire pressure. 4. Correct as required. Tires Show Exces- sive Wear on Edges of Tread 1. Underinflated tires. 2. Vehicle overloading. 3. High speed cornering. 4. Incorrect toe-in setting. 1.
Properly inflate to recommended pres- sure. 2. Correct as required. 3. Correct as required. 4. Set to correct specifications. Tires Show Exces- sive Wear in Center of Tread Tire overinflated. Properly inflate to recommended pressure.