TM  10-3930-653-14&P INCHING VALVE INSPECTION (1) Measure inner and outer diameters of valve body. If the difference exceeds service limit, replace piston or valve body. Unit: mm(in) Checking Item   Standard Value Service Limit Difference between valve 0.1 body and piston (0.004) (2) Measure inner diameter of valve body, and replace valve body if unsatisfactory. Unit: mm(in) Checking Item   Standard Value Service Limit Valve body inner 22.000-22.021 diameter (0.866-0.867) -- (3) Measure outer diameter of spool 50 mm (1.97 in) long. If worn, replace spool. Unit: mm(in) Checking Item   Standard Value Service Limit Outer dia. of spool 21.959-21.980 50 mm (1.97 in) long. (0.8645-0.8650) -- (4) Measure outer diameter of piston, and replace, if worn. Unit: mm(in) Checking Item   Standard Value Service Limit 21.959-21.980 Outer diameter of piston (0.8645-0.8650) Fig. 4-298. Fig. 4-299. Fig. 4-300. Fig. 4-301. 4 - 165