"GAGE,SHIMMING,RACK GUIDE;DURING ASSY OF A CONVERGENT EXHAUST NOZZLE CONTROL,A SHIM MUST BE INSTALLED ON THE GEAR RACK GUIDE ASSY;A GAGE MUST BE USED TO ACCURATELY DETERMINE SHIM;BECAUSE OF THE LOCATION AND DESIGN OF THE GUIDE ASSY,A SPECIAL GAGE IS RQRD;DIM. 3 IN. WIDE BY 8 IN. LONG BY 4 IN. HIGH;WEIGHT 2 LBS;INSERT GUIDE PORTION OF THE GAUGE INTO THE ACTUATOR ASSY AND ENGAGE RACK GUIDE ASSY;W/BLOCKS POSITIONID AGAINST THE ACTUATOR ASSY. MEASURE THE DISTANCE FROM RACK GUIDE ASSY,TO THE ACTUATOR BODY. USE SHAFT TO INSTALL/REMOVE SHIMS;THE BASE IS COMPOSED OF AN ALTERED DIGI-MATIC DEPTH MICROMETER W/TWO MACHINED STEEL BLOCKS. THE SHAFT AND GUIDE ARE COMPOSED OF MACHINED STEEL"