TM  10-3930-643-34 TRANSMISSION  TROUBLESHOOTING  AND  MAINTENANCE. 6-8. Scheduling Valve and Control Valve. (Sheet 2 of 4) REMOVAL 1. Using long round nose pliers, remove cotter pin (1), pin (2), cotter pin (3) and pin (4) from transmission. Discard cotter pins (1 and 3). NOTE Tag all hose and tube assemblies before disconnecting to aid in installation. 2. Using a 7/8" open end wrench, disconnect tube (5). 3. Remove union (6) from tee (19). 4. Using a 7/16" open end wrench, disconnect tube (7). NOTE Plug all ports in valves to prevent  entry  of  foreign  material or  dirt. 5* Using  1/2"  and  5/8"  open  end wrenches,  remove  elbow  (8)  and air cylinder (9) from control valve (14). Go to sheet 3 6-55

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