TM  10-3930-643-34 BRAKE  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 8-5. Power Cluster (S/N 2000 and below). (Sheet 2 of 4) 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   The following is a maintenance procedure for the right side power cluster. The  maintenance procedure for the left side power  cluster  is  identical. • Tag all tube assemblies before disconnecting   to   aid   in installation. 1. Using a 3/4” or a 1/2” open end wrench disconnect  tube  assembly  (1)  from power  cluster  at  front,  underside of vehicle. 2. Using 5/8" and 11116” open end wrenches,  disconnect  tube  assemblies (2, 3 and 4). 3. Using a 1/2" socket and socket wrench handle,  remove  four  locknuts  (5)  and power cluster (6). 4. Using an 11/16" open end wrench, remove fitting (7) and gasket (8). Discard gasket (8). Remove all gasket  material  from  mounting surfaces. 5. Using a 9/16" open end wrench, remove elbow (9). 6. Using an 8“ pipe wrench, remove coupling (10) and nipple (11). 7. Using 9/16” and 11/16” open end wrenches,  remove  elbows  (12  and 13). Go to sheet 3 8-18