TM   5-5420-226-20-1 ( ( DETAILED TROUBLESHOOTING PROCEDURE VEHICLE OPERATION -  BRAKES Symptom-22 (Continued) T Check service brakes for   proper adjustment. I Both l l First l Technicians (Rear Grille Doors) Remove transmission access    covers (page 16-34). Remove Iockwires and    plugs from both right and    left brake inspection holes. Technician (Operator’s Station) Press    brake pedal    and    observe pressure gage    indicates 750-900 psi   and    keep    pressed. Second Technician (Brake Inspection Holes) l   Check    if index   line  marked   A  (Applied)    aligns   within   1/ 64  inch   of  chiseled line  located on  edge   of  brake   anchor. First Technician (Operator’s Station) l   Release   brakes. Second Technician (Brake Inspection Holes) l   Check   if  index    line   marked    R   (Released) aligns within 1/64    inch    of   chiseled line   located on   edge   of   brake Are   service brakes properly adjusted? ) Adjust service brakes (page 13-78). b TION (RIGHT SIDE    SHOWN) UNDER REAR    GRILLE DOORS T==== &^{NOYESl   Install    plugs    in  both    right   and} left   brake InspectIon holes and   Iockwire. TA107O33 4-344