TM  10-3930-643-34 BRAKE  TROUBLESHOOTING  AND  MAINTENANCE. 8-7. Pressure Converter (S/N 2001 and above). (Sheet 2 of 5) REMOVAL Make sure that vehicle will not roll or shift. Secure with wood blocks  . DEATH or serious injury may result by your  failure to  follow  this procedure. NOTE l The following is a maintenance procedure for the rear brake (left hand) pressure converter. The maintenance procedure for the front brake (right hand) pressure  converter  is  identical, except as noted. l All  electrical  connections, except those on the instrument panel, are sealed against moisture  with  silicone  sealant. Remove all silicone sealant before  performing  maintenance  on electrical  connections. . Tag all hose and tube assemblies before disconnecting to aid in installation. 1. Disconnect  wire  assembly  (1)  at terminal and using 1/2”, 7/8” and 5/8” open  end  wrenches,  disconnect  hose assemblies (2 and 3) and tube assemblies (4 and 5) from pressure converter on front of vehicle. 2. Using a 3/8”   open  end  wrench,  remove two nuts (6), washers (7) and wire assemblies  (8)  from  left  side  of pressure  converter  (13)  only. Go to sheet 3 8-27