User manual BENDIX ROTO CHAMBERS

[. . . ] The rotochamber is also used in industrial applications and in such cases may be used in clamping or holding operations. The greater air pressure admitted to the rotochamber, the greater the force applied by the push rod and, conversely, the less air pressure applied to the rotochamber, the less force applied by the push rod. Push rod force is determined by multiplying the air pressure delivered by the effective diaphragm area. For example, if 60 psi is admitted to the Type 30 rotochamber the lineal force on the end of the push rod is approximately 1800 lbs. [. . . ] Insert the push rod yoke pin through the hole in the yoke and slack adjuster. Make sure the same hole location in the slack adjuster on each side of the axle is used. The yoke should be adjusted on the push rod so that with brakes released the angle formed by the push rod and slack adjuster will be greater than 90° and all slack adjusters should be at the same angle. With properly adjusted brakes applied, the angle should still be greater than 90°. DISASSEMBLY For ease in disassembly, if the rotochamber has been in service and shows signs of rust accumulation, it is recommended that the chamber be immersed and soaked in the cleaning or rust dissolving solvent for 24 hours. These nuts secure the outer clamp to the body and are located at the air inlet end of the rotochamber. Grasp the push rod and by pulling and wiggling the entire assembly consisting of push rod and plate, diaphragm guide, diaphragm, inner and outer clamps should ease out of the body. Disassemble inner diaphragm clamp, diaphragm and push plate rod assembly from the diaphragm guide. OPERATING AND LEAKAGE TESTS A. Apply brakes and observe that the push rods move out promptly and without binding. Release brakes and observe that the push rods return to the released position promptly and without binding. Push rod travel should be as short as possible without brakes dragging. If leakage is detected, the diaphragm must be replaced. CLEANING AND INSPECTION 1. The smaller diameter end of the diaphragm should be against the diaphragm clamp. Place and install the diaphragm guide within the diaphragm and over the inner diaphragm clamp studs. Install the push plate push rod assembly within the diaphragm guide and over the inner diaphragm clamp studs. Place the assembly consisting of the push rod, push plate, diaphragm guide, diaphragm and inner clamp inside of the outer clamp. Roll the free end of the diaphragm back and over the end of the outer diaphragm clamp. Lubricate the inside wall of the body and the rolled surface of the diaphragm with Murphy's oil soap. The end of the diaphragm should fit snugly against the shoulder in the body. [. . . ] If the work is being performed on the vehicle's air brake system, or any auxiliary pressurized air systems, make certain to drain the air pressure from all reservoirs before beginning ANY work on the vehicle. If the vehicle is equipped with an AD-ISTM air dryer system or a dryer reservoir module, be sure to drain the purge reservoir. Following the vehicle manufacturer's recommended procedures, deactivate the electrical system in a manner that safely removes all electrical power from the vehicle. Never connect or disconnect a hose or line containing pressure; it may whip. [. . . ]