John Deere brake disc versus non-genuine brake disc

Transcription

1 QUALITY INFORMATION John Deere brake disc versus non-genuine brake disc Brake discs are actually energy conversion devices, which convert the kinetic energy (momentum) of your machine into thermal energy (heat). Due to growing demands, today s braking systems are getting more and more complex. Especially important requirements are: Reliable performance at all times Highest braking comfort without irritating noise Constant braking effect and good modulation Corrosion resistance in various environmental conditions Following you will find the results of a comparison between genuine John Deere brake discs versus the non-genuine part regarding Dimensions Friction characteristics Durability Material quality Overview of respective John Deere part numbers Part No. Tractor Series Remarks AL , mm - for heavy duty applications AL , mm AL AL , 6010, 6010 SE, 6020, 6020 SE, 6015, 6030, 6025, 6030 Premium 6000, 6010, 6020, 6020 SE, 6015, 6030, 6025, 6030 Premium 4.9 mm (sub for AL168781) 5.9 mm - for heavy duty applications (sub for AL168782) Design of a genuine John Deere brake disc HUB JD PART NO. TEETH BRAKE PAD WITH GROOVE PATTERN RIVETED JOINT CORE PLATE

2 s of quality checkup Dimension Compared to the specification required for John Deere equipment, the core plate of the non-genuine brake disc is too thick and the friction material not thick enough. Both parameters show a relevant tolerance deviation. Furthermore, the brake disc as a whole is too thick. The non-genuine brake disc does not comply with John Deere specifications The determined tolerance deviations have a negative impact on the braking effect and the interaction of the complete brake system As the friction material is not thick enough, the brake disc wears out more rapidly Genuine brake discs conform to John Deere specifications, which is essential for reliable and durable performance of the complete brake system. Just small deviations in dimensions have a huge impact on the reliability of the braking effect and wear. Reduced wear Reliable braking effect and performance Consistent interaction of complete brake system due to correct dimensions Friction test The friction test simulates brake activations. The brake discs have to fulfill a minimum of 1,000 cycles. Test criteria are: Wear of brake disc and brake pad Friction coefficient The friction material of the non-genuine brake disc glazed after only 200 cycles. Indication of low-quality material Worsened oil-cooling effect Reduced thermal conductivity Worsened braking effect High wear

3 Durability Test In the durability test, the hub has to bear 5,000 Nm/3,688 lb.-ft. in changing directions for at least 30,000 cycles. During the test, each tooth has to bear more than 1,000 kg/2,205 lb. The non-genuine part fails after only 7,750 cycles as a result of tooth breakage. Loss of the complete braking system! The non-genuine brake disc shows an unequal contact pattern at the lower and upper hub! Uneven power transmission Tooth breakage The John Deere brake disc shows equal contact pattern after 30,000 cycles! Optimum power transmission High standard of workmanship Maximum durability

4 Riveted joints The non-genuine riveted joint has a different shape and provides less contact area than the John Deere riveted joint! Worsened force distribution Reduced power transmission Less reliability Genuine riveted joint provides high contact area for force distribution. Optimum force distribution and power transmission Highest reliability The non-genuine riveted joints are made from standard material which is not heattreated the result is higher wear! The connection of the hub to the core plate is not free of backlash! Less stability and durability for the whole brake disc! Increased wear John Deere riveted joints are heat-treated and connect the hub to the core plate without backlash! Greater stability and durability Less wear

5 Genuine John Deere quality features at a glance Genuine John Deere brake discs are a substantial part of John Deere s highly sophisticated disc brake system. are self-adjusting as well as self-equalizing and are therefore maintenance-free! conform to the John Deere specifications, which are essential for a reliable and durable performance of the complete brake system just small deviations in measurements have a huge impact on the reliability of the brake effect and wear. are oil-cooled, asbestos-free and made from corrosion-resistant material - for maximum lifetime. are equipped with heat-treated riveted joints, which connect the hub to the core plate without backlash. They also provide a high contact area for optimum force distribution. Both characteristics are required to achieve optimum power transmission for greater stability and durability. feature high-quality friction material with a special groove pattern for optimum oil absorption resulting in a superior cooling effect and thermal conductivity for maximum lifetime. have a hub with accurately manufactured teeth, which are essential for even power transmission as well as to minimize wear of the teeth for greater durability. feature a core plate made from specially pre-treated resulting in more durable adhesion of the friction material for reliable performance when you need it most!