Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
techtalk:ih:wheels02 [2020/05/26 22:55] hippysmack [Caliper ID and Applications] |
techtalk:ih:wheels02 [2020/05/29 03:55] hippysmack [Brake Disc and Pads] |
||
---|---|---|---|
Line 58: | Line 58: | ||
- | **Front Calipers** | + | **Front Caliper** |
* Banana | * Banana | ||
* 1973 XL, FX Models | * 1973 XL, FX Models | ||
Line 69: | Line 69: | ||
* 1977-1979 FXS | * 1977-1979 FXS | ||
* 1978-1983 FX, XL | * 1978-1983 FX, XL | ||
- | * Semi Torque Free | + | * Semi Torque Free Kelsey Hayes |
* 1983-1985 XR1000 | * 1983-1985 XR1000 | ||
* 1984-up All models except FLH | * 1984-up All models except FLH | ||
Line 93: | Line 93: | ||
* 1983-1984 and 1987 FLHS | * 1983-1984 and 1987 FLHS | ||
- | ====== Brake Pads ====== | + | ====== Brake Disc and Pads ====== |
+ | From HD Teschnical Service Bulletin M-712 dated June 16, 1977: \\ | ||
+ | //Disc brake friction material can be classified as organic, semi-metallic, or metallic. \\ | ||
+ | Organic material will outwear an equal section of metallic material under normal operating conditions. \\ | ||
+ | |||
+ | An organic pad will also reduce heat transfer between the brake disc and brake fluid in the caliper. \\ | ||
+ | It is also less harsh on the disc and usually leaves the disc with a polished look. \\ | ||
+ | This material has two disadvantages: // | ||
+ | |||
+ | - //The organic material will fade when high pad temperatures are developed.// | ||
+ | - //Wet stopping power is very poor when the material is thoroughly wet. // | ||
+ | |||
+ | //Metallic friction material increases it's efficiency as temperatures increase, and water has little effect on stopping performance. \\ | ||
+ | Metallic linings, in normal service, have a shorter wear life than organic. \\ | ||
+ | Semi-metallic have characteristics in between the organic and metallic. \\ // | ||
+ | |||
+ | //Replace pads when the thickness of the friction material has worn down to 1/16" or less on all models except those specified in the paragraph below. \\ // | ||
+ | |||
+ | //We suggest that you use only the recommended Harley-Davidson pads. \\ | ||
+ | 1974 thru 1977 XL, XLCH, XLT, FX, FXE, FXS models have a wear indicator slot in the front brake pad friction material. \\ | ||
+ | Replace pads when the friction material has worn down to 3/32" thickness as shown in the illustration. \\ // | ||
+ | |||
+ | {{:techtalk:ih:wheels:1974-1977_brake_pads_drawing_by_hippysmack.png?direct&300|}} ((drawing by Hippysmack)) \\ | ||
+ | |||
+ | Motorcycle brakes operate under high temperatures and can absorb far more horsepower than the engine produces. ((HD Teschnical Service Bulletin M-712 dated June 16, 1977)) \\ | ||
+ | The discs do not need a polished appearance to maintain efficiency. \\ | ||
+ | A disc with a slight amount of grooving similar to a phonograph record is normal with metallic brake pads and is acceptable if the surface is smooth. \\ | ||
+ | The newer stainless brake discs may appear grooved, but if you run your fingernail over the surface you find there are no grooves. \\ | ||
+ | Disc runout, on the motorcycle, should not exceed .015". If the disc becomes warped or dished beyond this specification it should be replaced. \\ | ||
+ | Brake pedal travel is increased with the wave washer type of piston retraction. Caution must be used when adjusting brake pedal travel. \\ | ||
+ | If the required freeplay in the plunger is adjusted away, the expanding brake fluid cannot return to the reservoir and gradual energization of the brake may occur. \\ | ||
+ | If there is any doubt concerning this freeplay or other proper operation of the master cylinder; \\ | ||
+ | The master cylinder cap should be removed and the pedal depressed several times. A squirt of fluid each time will verify proper operation. \\ | ||
+ | |||
+ | |||
+ | **Disc and pad sets**: | ||
+ | |Disc, Material|Pad| | ||
+ | |-73, mild steel|organic| | ||
+ | |-78, hard stainless|semi-iron, black| | ||
+ | |-79, very hard stainless|semi-iron, copper| | ||
+ | |-84, very hard stainless \\ 11/12" rotor|semi-iron, copper| | ||
+ | |-84A, 30 hole, anti symmetrical|semi-iron, copper| | ||
+ | |-94, softer stainless|semi-iron, gray| | ||