TM 10-3930-659-20 7-18. TRANSMISSION OIL SAMPLING VALVE REPLACEMENT. This task covers: a. Removal b. Installation INITIAL SETUP: Equipment Conditions: Materials/Parts: •    Parking brake set (see TM 10-3930-659-10). • Rags (Item 27, Appendix C) •    Left engine upper sideshield opened (see TM 10-• *Two preformed packings 3930-659-10). References: Tools/Test Equipment: * TM 103930-659-10 •    General mechanic's tool kit (Item 44, Appendix F) NOTE A  suitable  container  should  be  used  to  catch  any  draining  hydraulic  fluid. Ensure that all spills are properly cleaned. a. REMOVAL 1. Remove hose (1) from tee (5). 2. Remove tee (5) from transmission thermal bypass valve (6). 3. Remove transmission oil sampling valve (4) from special plug (3). 4. Remove special plug (3) from tee (5). 5. Remove two preformed packings (2) from tee (5).  Discard preformed packings. b. INSTALLATION 1. Install two new preformed packings (2) on tee (5). 2. Install special plug (3) on tee (5). 3. Install transmission oil sampling valve (4) on special plug (3). NOTE Ensure that transmission oil sampling valve drain Is facing down when Installed. 4. Install tee (5) on transmission thermal bypass valve (6). 5. Install hose (1) on tee (5). 7-56