TM 9-2815-225-34&P 3-42.  OIL COOLER REPAIR (Contd) LOCATION/ITEM ACTION REMARKS a.  Disassembly (Contd) 8. Three screws (42), Remove from head (46). Screws (42), lockwashers (43), lockwashers (43), washers washers (44), and bracket (45) (44), and bracket (45) may have already been removed. Discard lockwashers (43). 9. Three screws (60), Remove from housing (49). Discard preformed packing (47) lockwashers (36), washers and gasket (48). (51), head (46), preformed packing (47), and gasket (48) 10. Low oil pressure switch Remove. Refer to TM 9-2320-273-20 or TM 9-2320-283-20. 11. Spring (58), bypass valve Remove from housing (49) and piston (57), spring (56), separate. bypass valve plunger (55), and pressure sensing piston (54) 12. Six screws (50), lockwashers Remove from housing (49). Discard lockwashers (36) and (36), washers (51), support gasket (34). (41), and gasket (34) NOTE To  prevent  hardening  and  drying  of  foreign  substances,  clean  oil  cooler  core  as  soon  as possible after removal. 13. Cooler core (33) and Remove from housing (49). Discard gasket (52). gasket (52) 14. Two screws (35), lockwashers Remove from support (41). Discard preformed packing (38) (36), valve (37), and and lockwasher (36). preformed packing (38) 15. Pipe plugs (40) and (39) Remove from support (41). 16. Adapters (53) and (59) Remove from housing (49) and head (46). 3-222