TM 10-3930-653-14&P CONTROL VALVE INSPECTION (1) Measure  inner diameter of change spool sliding part of valve body. Unit: mm(in) Checking Item   Standard Value Service Limit 25.000-25.021 Change spool sliding part (0.984-0.985) -- (2) Measure inner diameter of piston sliding part of valve body. Unit: mm(in) Checking Item   Standard Value Service Limit 18.000-18.018 Piston sliding part (0.7090-0.7093) -- (3) Measure inner diameter of spool fitting part of valve body, replace, if worn. Unit: mm(in) Checking Item   Standard Value Service Limit 16.000-16.018 Spool fitting part (0.629-0.631) -- (4) Measure outer diameter of change spool, and replace, if worn. Unit: mm(in) Checking Item   Standard Value Service Limit Change spool outer 24.959-24.980 diameter (0.9826-0.9834) -- Fig. 4-302. Fig. 4-303. Fig. 4-304. Fig. 4-305. 4-166