TM 10-3930-659-20 17-31.    HYDRAULIC OIL RETURN FILTER ASSEMBLY REPLACEMENT. This Task Covers: a. Filter Replacement c. Filter Head Installation b. Filter Head Removal Initial Setup: Equipment Conditions: Materials/Parts: Hydraulic reservoir drained (filter head replacement •  Hydraulic fluid (Item 18, Appendix C) only) (see LO 10-3930-659-12). •  Rags (Item 27, Appendix C) Left engine upper sideshield opened (see TM 10- •  Marker tags (Item 33, Appendix C) 3930-659-10). •  Five preformed packings Tools/Test Equipment: References: General mechanic's tool kit (Item 44, Appendix F) •  LO 10-3930659-12 Adjustable wrench (Item 49, Appendix F) •  TM 10-3930-659-10 Pipe wrench, strap (Item 50, Appendix F) NOTE A suitable container should be used to catch any draining hydraulic fluid.  Ensure that all spills are properly cleaned. a. FILTER REPLACEMENT 1. Remove  hydraulic  oil  return  filter  element  (1) from hydraulic oil return filter head (2). 2. Fill  hydraulic  oil  return  filter  element  (1)  with clean   hydraulic   fluid   and   install   hydraulic   oil return filter element on hydraulic oil return filter head (2). TA707676 17-93

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