TM10-3930-660-34 7-8.  TRANSMISSION CONTROL VALVE - REPLACE/REPAIR (Cont’d) DISASSEMBLY 1. REMOVE NEUTRAL START SWITCH (7). CAUTION Do not over tighten vise jaws. Failure to follow this precaution will cause part damage. 2. LINE VISE JAWS WITH SOFT MATERIAL TO AVOID DAMAGING VALVE HOUSING. 3. DISASSEMBLE TRANSMISSION VALVE (8-46). WARNING The spring (10) is under compression. Use care when removing plug (8). a.   Remove plug (8). Remove and discard O-ring (9). b.   Remove return spring (10) and spring guide (11). c. Remove pressure valve assembly (12). d.   Remove and discard two O-rings (13). e.   Remove elbow (14). Remove plug(15) if necessary. f. Remove brake line plug (16). Remove and discard O-ring (17). g.   Remove brake cutoff piston (18). h.   Remove plugs (19 and 20). Remove and discard O-ring (21) from each plug (19 and 20). i. Remove and discard oil seal (22) from plug (20). 7-50