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ARMY TM 9-2815-255-24 AIR FORCE TO 38G1-95-2 MARINE CORPS TM 2815-24/4 3-27.4.  Inspect and Measure. 3-27.4.1  General. a. Inspect all components for excessive wear, foreign material or corrosion, nicks or chipping, scratches or scores, thread damage, cracks, distortion, and freedom of movement.  Examine springs for fretting, wear, distortion, or breakage.  Clean and carefully check all bores, grooves, and seal seats for damage or wear of any kind. b. Disassemble rotor assembly (as necessary) as follows: CAUTION Do not handle precision machined surface of rotor. (1) Carefully remove each roller (27, FIGURE 3-52) and shoe (28) while retaining each roller in its shoe and lay roller and shoe pairs out on a clean surface in a manner such that they can be returned to same slots in rotor in the same direction they were removed. (2) Carefully remove the plungers and lay them out on a clean surface so they can be returned to same bore in rotor in same direction that they were removed. 3-27.4.2  Drive Shaft. Measure distance across flats of drive tang which must not be less than 0.305 inch (7.75 mm).  Shaft diameter in drive shaft seal area must be free of nicks and scratches for seals to function properly.  Moderate shaft wear from seal lips is normal. 3-27.4.3  Hydraulic Head. Warning Compressed  air  used  for  cleaning  can  create  airborne  particles  that  may  enter  the  eyes  and cause serious Injury.  Pressure will not exceed 30 psig (207 kPa).  Eye protection required. CAUTION Do not immerse head in solvent for extended periods, as sealant damage will result. NOTE Five vent wire screw assembly (50, FIGURE 3-45) sizes are available.  If specific oil return flow is not obtained during test, replace screw with appropriate size. Check vent wire screw assembly (50) for freedom of movement.  Flush head and blow out all passages with clean, dry air.  If vent wire is stuck, replace screw assembly with screw of same part number. 3-98


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