- Reference life interval
a. Good working conditions+standardized maintenance (standard load, highway, regular oiling, no frequent sudden braking)
-Camshaft body (short shaft base): 8-12 years/800000 to 1.2 million kilometers
-Cam working surface, splines, bushings, oil seals and other vulnerable parts: 2-4 years/200000 to 400000 kilometers (not part of the main shaft body, requiring regular replacement)
b. Moderate working conditions (occasional overloading, mixed road surface on national highways, routine maintenance)
-Short axis body: 5-8 years/500000 to 800000 kilometers
-Cams, bushings, rollers: 1.5 to 3 years
c. Adverse working conditions (frequent overloading, dirt roads in mines/construction sites, frequent emergency braking, lack of maintenance)
-Short shaft body: 2-5 years/200000 to 500000 kilometers, prone to cam wear, shaft bending, and seat hole cracking
-Vulnerable parts: Six months to two years, oil seals and bushings are easily damaged - Key factors affecting lifespan
a. Load: Long term overload is the main reason for shortening the service life, which will accelerate cam wear and shaft bending deformation
b. Lubrication: The position of the cam liner must be regularly lubricated with grease; Lack of oil will quickly wear down the cam and liner
c. Usage habits: frequent emergency braking, continuous braking on long downhill slopes, and high impact loads
d. Environment: Construction sites, saline alkali, and rainy environments are prone to water ingress, corrosion, and oil seal failure
e. Assembly and debugging: The brake clearance is adjusted too small, continuous dragging of the brake, and continuous high temperature accelerated wear - Change the judgment criteria (do not rely solely on age and mileage, it is recommended to replace if the following situations occur)
-The wear groove depth of the cam working surface is greater than 1.5mm
-Short axis undergoes bending deformation
-Spline wear, slipping rolling key
-Wear and looseness of the shaft seat hole, and cracking of the bracket - Maintenance suggestions
-Add lubricating grease to the camshaft liner every 10000 to 20000 kilometers
-Check the oil seal for oil leakage and the dust cover for damage during each maintenance
-Regularly check the brake clearance to avoid dragging the brakes
What is the typical service life of a cam brake short shaft?