PNEUMATIC SYSTEM

TM 11-6625-3081-23 1-11. DESCRIPTION OF ELECTRO-OPTICAL TEST BENCH SET (cont) 1-11 b. PNEUMATIC SYSTEM (1) The pneumatic system (Barry controls, SERVA-LEV’L Vibration Isolation System AGL-2) consists of a pneumatic control panel and four pneumatic isolators. The following data provides information on the individual sections of the pneumatic system. (a) The pneumatic control panel is located on the front lower section of the nightside test bench. It is attached to a piano hinged access panel that is secured by two panel screws. It contains four pressure gages (0-160 psi), a filter and filter bowl, regulator, toggle valve, and color coded 1/4 inch polyethylene tubing that con- nects to the isolator assemblies. (b) The E/O bench is supported by four pneumatic (stabilizing) isolators. Each isolator contains a piston plate that rests on a rubber diaphragm. An isolator is bolted to the van floor under each of the four corners of the base assembly. Three of the four isolators each have a mechanically adjustable valve assembly. The air supplied to the isolators must not exceed 125 psi. (2) The purpose of the pneumatic system is to isolate the E/O test bench assembly from any externally created physical disturbances during testing of LRUs containing optical elements. Three test program sets (TPS) call for use of the pneumatic system. All other TPS use the E/O bench in a deflated mode. 1-33