TM 9-2815-225-34&P 3-50.  ENGINE RETARDER REPAIR (Contd) LOCATION/ITEM ACTION REMARKS c.  Assembly 25. Two slave pistons (18) or (19) Install on brake housing (20). Slave piston (19) is for milled cylinder heads. 26. Two springs (17), retainers Depress slave piston springs (17) Make certain slave piston (16), and retaining rings (15) and slave piston retainers (16) retainers (16) are positioned in with deepwell socket and C-clamp. grooves of slave pistons (18) or Install retaining rings (15). (19). 27. Two setscrews (9) and Install on brake housing (20). Setscrews (9) and locknuts (8) are locknuts (8) tightened during clearance adjustment during engine assembly. 28. Two master pistons (11) Install on brake housing (20). 29. Two master piston Install on master pistons (11) and Assemble spring (12) to piston (11) springs (12), washers (13), brake housing (20). with concave part of spring (12) and screws (14) toward piston (11) and centered on turned boss on piston (11) top. 30. Three new rings (5), (6), and Lubricate with OE/HDO 30 (7) lubricating oil. 31. New lower seal ring (7) Install on bottom of bore on brake housing (20). 32. New upper seal ring (5) Install on solenoid valve and center seal ring (6) assembly (4). 33. Solenoid valve assembly (4) Install on brake housing (20) and Use solenoid valve wrench tighten with solenoid valve (011494).  Do not disturb position wrench. of upper seal ring (5) or center seal ring (6). 34. Harness (3) Connect to solenoid valve assembly (4). 35. Terminal (10) Install on brake housing (20). 36. Harness (3) Connect to terminal (10). 37. Two control valves (21) Install on brake housing (20). 38. Two control valve inner Install on control valves (21). springs (23) 39. Two control valve outer Install on control valves (21). springs (22) 40. Two control valve covers (1) Position control valve covers (1) and screws (2) over valve bore and secure with screws (2). FOLLOW-ON TASK: Install engine retarder and adjust slave piston (para. 3-86). 3-310