Oil Contamination of Drum Brake Lining: Causes and Solutions

What may cause oil contamination of drum brake lining bolted to a solid rear axle?

A) Faulty brake master cylinder
B) Loose lug nuts
C) Worn brake shoes
D) Cracked brake rotor

Answer:

Oil contamination of drum brake lining is usually due to leakage of differential oil or axle grease. Faulty brake master cylinder, loose lug nuts, worn brake shoes, and cracked brake rotor do not typically cause this issue.

Oil contamination of drum brake lining bolted to a solid rear axle is generally caused by leakage of differential oil or axle grease. Differential oil is essential for the proper functioning of the differential gear system and is usually sealed within the axle housing. When there is a fault in the seals leading to leaks, the oil can contaminate the drum brake lining.

A Faulty brake master cylinder (A) would typically result in a loss of hydraulic pressure, affecting brake efficiency, but would not directly cause oil contamination of the brake lining. Loose lug nuts (B) can cause a variety of dangerous situations including wheel separation, but again, would not lead to oil contamination. Worn brake shoes (C) can lead to reduced braking efficiency and increased stopping distance, but they don't directly contribute to oil contamination. Cracked brake rotor (D) could impair the braking system performance but usually do not cause oil contamination in drum brakes.

It is important to regularly inspect the axle housing seals and differential gear system for leaks to prevent oil contamination of the drum brake lining. Proper maintenance and prompt repairs can help ensure the safety and efficiency of the braking system.