User manual BENDIX E-10PR RETARDER CTRL BRAKEVALVE

[. . . ] ® Bendix® E-10PRTM Retarder Control Brake Valve TREADLE The E-10PRTM valve is capable of controlling up to a threestage retarder (different levels of retardation) through the sequencing of its three electrical switches. The sequencing of these switches is important to the proper operation of the retarder. E-10PRTM retarder control brake valve is a floor mounted, treadle operated type brake valve with two separate supply and delivery circuits for service (primary and secondary) braking, which provides the driver with a graduated control for applying and releasing the vehicle brakes. The E-10PRTM valve uses a metal coil spring (6) housed in an upper body assembly. [. . . ] Remove spring seat (5) and coil spring (6). Caution: Before proceeding with the disassembly, refer to Figures 3 and 4 and note that the lock nut (7) and stem (22) are used to contain the primary piston return spring (12), stem spring (9), and the relay piston spring (27). 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. Using a 3/8" wrench, hold the lock nut (7) on the threaded end of the stem (22). Insert a screwdriver to restrain the stem, remove the lock nut (7), spring seat, (8) and stem spring (9). Remove the primary piston (11) from adapter (13) and o-ring (10) from the primary piston (11). Remove the relay piston (24), relay piston spring (27), primary piston (11) and primary piston return spring (12) from the upper body. Use care so as not to nick seats. 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 - Refer to figures 3 and 4 for item numbers referenced in parenthesis. 1. Chock the vehicle wheels or park the vehicle by mechanical means. INSTALLATION OF THE RETARDER CONTROL ASSEMBLY 1. Place the retarder control assembly (1) onto the upper valve housing (13) making sure it is oriented correctly. (Refer to marks made on unit prior to disassembly). CAUTION: Switch damage will result if the plunger is permitted to slide out of the bore by more than 3/8". Place the mounting bracket onto the top of the retarder control assembly in its proper location. (Again referring to marks made prior to disassembly. ) Retain with the three long cap screws (2) and torque to 80-120 in. Do not use silicone grease in the retarder control section. Replace the boot by expanding its large diameter into the recess in the mounting plate and the small diameter into the recess of the plunger. [. . . ] Slowly depress the treadle until the air delivery of the primary circuit (shown on the air gauge) reaches 12 psi. At which time switch #3 should close and the volt-ohm meter will respond with a reading of near 0. If an adjustment to this switch is required, follow the instructions under the heading "Switch Adjustments. " 6. When all adjustments to the switches are complete, the Allen screws should be resealed using any available sealant (such as paint or liquid gasket material). [. . . ]