User manual BENDIX E-10 SERVICE DATA

[. . . ] As the exhaust valve closes, the primary inlet valve is moved off its seat, allowing primary air to flow out the primary delivery port. SD-03-817 1 16 25 15 28 18 19 17 26 27 22 23 17 16 34 7 8 1 2 18 4 5 33 31 32 30 24 21 20 14 19 6 13 12 9 11 10 FIGURE 4 - BENDIX® E-10TM DUAL BRAKE VALVE SECTIONAL DIAGRAM FIGURE 3 - BENDIX® E-6® DUAL BRAKE VALVE SECTIONAL DIAGRAM APPLYING: NORMAL OPERATION SECONDARY CIRCUIT When the primary inlet valve is moved off its seat, air is permitted to pass through the bleed passage and enters the relay piston cavity. The air pressure moves the relay piston, which contains the exhaust seat, and closes the secondary exhaust valve. As the secondary exhaust valve closes, the secondary inlet valve is moved off its seat allowing the secondary air to flow out the secondary delivery port. Because of the small volume of air required to move the relay piston, action of the secondary circuit of the valve is almost simultaneous with the primary circuit portion. delivery ports ­ the primary piston will mechanically move the relay piston, allowing the piston to close the secondary exhaust valve and open the secondary inlet valve, allowing air to flow out the secondary delivery port. BALANCED: PRIMARY CIRCUIT When the primary delivery pressure acting on the piston equals the mechanical force of the brake pedal application, the primary piston will move and the primary inlet valve will close, stopping further flow of air from the primary supply line through the valve. [. . . ] Remove the rubber seal ring (14) from the lower body. BENDIX® E-6® BRAKE VALVE ONLY (Figure 3): 7. While applying thumb pressure to the primary piston, lift out and up on the three lock tabs of the primary piston retainer (15). BENDIX® E-10TM BRAKE VALVE ONLY (Figure 4): 8. While depressing the spring seat (7), remove retaining ring (8). Remove the spring seat and coil spring (5). 9. Using a 3/8" wrench, hold the lock nut (16) on the threaded end of the stem (17) in the primary piston (2). Insert a screwdriver in the exhaust passage through the center of the valve and engage the slotted head of the stem. Remove lock nut (16), spring seat (18), stem spring (19), primary piston (2), and primary piston return spring (6). Caution: Before proceeding with the disassembly, refer to Figure 4 and note that the lock nut and stem are used to contain the primary piston return spring, stem spring and the relay piston spring. The combined force of these springs is approximately 50 pounds and care must be taken when removing the lock nut as the spring forces will be released. It is recommended that the primary piston and relay piston be manually or mechanically contained while the nut and stem are being removed. BENDIX® E-6® BRAKE VALVE ONLY: 12. Using a screwdriver to restrain the stem, as in step nine, remove the lock nut (16), spring seat (18) and stem spring (19). Remove the relay piston (20), relay piston spring (21), primary piston and primary piston return spring (23) from the upper body. Note: Certain E-6® brake valves do not have a relay piston spring (21). If this spring is not found, do not install a replacement. On valves manufactured after October 7, 1976, a small washer (24) will be found in the cavity in the lower side of the primary piston (22). LEAKAGE CHECK 1. Make and hold a high pressure (80 psi) application. Coat the exhaust port and body of the brake valve with a soap solution. Leakage permitted is a 1" bubble in 3 seconds. If the brake valve does not function as described above or leakage is excessive, it is recommended that it be replaced with a new or remanufactured unit, or repaired with genuine Bendix® parts available at authorized Bendix® parts outlets. REMOVAL 1. [. . . ] Never connect or disconnect a hose or line containing pressure; it may whip. Never remove a component or plug unless you are certain all system pressure has been depleted. 8. Use only genuine Bendix® brand replacement parts, components and kits. Replacement hardware, tubing, hose, fittings, etc. [. . . ]