TM 9-2815-225-34&P 3-86.  ENGINE RETARDER INSTALLATION (Contd) LOCATION/ITEM ACTION REMARKS a.  Installation (Contd) 4. Solenoid valve assembly (36) Install on engine brake retarder (31), and new preformed packing if not installed. (7), (8), and (9) 5. Lockshaft screw (22), bolt (20), Install on rocker arm housing (23), and preformed packing (21) if not installed. 6. Terminal (14) Install on engine brake retarder (31), if not installed. 7. New gasket (19) Position on rocker arm housing (23) and engine brake retarder (31). 8. Engine brake retarder Install on rocker arm housing (23). assembly (31) 9. Two short spacers (32) Install on two rocker housing Two short spacers (32) are studs (25). needed for fan bracket assembly (1) which mounts on two front rocker housing studs (25) of engine brake retarder (31) for No. 1 and 2 cylinders. 10. Fan bracket assembly (1) Install on two rocker housing The fan bracket assembly (1) fits studs (25) on top of two short on two front rocker housing studs spacers (32) on engine brake (25) on top of two short spacers retarder (31). (32) on brake retarder (31) for cylinders No. 1 and 2. 11. Six nuts (2) Install on rocker housing studs (25) and tighten to 60 lb-ft (81 Nm) as shown in tightening sequence (18). b.  Slave Piston CAUTION Adjusting  slave  piston  by  any  other  method  than  specified  in  this  procedure  will  cause damage to related parts. NOTE   The following procedure involves adjustment for one slave piston.  There are two slave pistons  per  brake  retarder,  or  one  per  cylinder.    The  adjustment  for  the  remaining  five slave pistons is similar.  Ensure locknuts are loose before adjusting setscrew.   Slave piston adjustment must be made with engine stopped and cold.  Exhaust valve on cylinder to be adjusted must be fully closed.   The adjustment procedure for slave piston requires engine crankshaft to be rotated and accessory drive pulley assembly positioned on timing mark A, B, or C.  When positioned at timing mark A, cylinders No. 5 or 2 can be adjusted.  When positioned at timing mark B, cylinders No. 3 or 4 can be adjusted.  When positioned at timing mark C, cylinders No. 6 or 1 can be adjusted. 3-652