What are the reasons for the Caterpillar 336's inability to brake during rotation?
2 Answers
Caterpillar 336's inability to brake during rotation can be attributed to the following reasons: Air in the brake line: Brake fluid serves as the medium for the brake system's transmission. If there is air in the brake line, the brake fluid under high pressure will appear insufficient in force. Although there is still braking force, it is significantly weakened. In this case, the brake system should be promptly bled at a repair shop. Brake fluid not replaced for a long time: Brake fluid has strong hygroscopic properties and easily absorbs moisture from the air. If not replaced in time, it will contain excessive impurities and moisture, which will affect the transmission of braking force. Oil leakage or overly soft brake material: Generally, oil leakage from the brake master cylinder or brake line will cause the vehicle's brakes to become soft. Additionally, if the brake material is too soft, its high-temperature stability will deteriorate, similarly resulting in soft brakes.
I've been operating excavators for over a decade and have frequently encountered the issue of Caterpillar 336's swing brake failure. The main causes are usually brake component wear, such as thinning brake pads or hydraulic cylinder oil leaks, resulting in insufficient braking force. Since the swing system is hydraulically driven, low oil pressure or clogged dirty oil can prevent effective braking. I recommend first checking the brake pad thickness - excessive wear generally requires replacement, then use a pressure gauge to test if oil pressure meets standards. Don't skip routine maintenance - clean hydraulic oil filters monthly to prevent contaminant buildup. During operation, rapid swinging accelerates wear, so smooth rotation is best for prolonging component lifespan. Safety first - incomplete swinging affects machine balance and may cause accidents.
