TM 10-3930-659-20 6-35. HYDRAULIC OIL FILTER RESTRICTION SWITCH REPLACEMENT. This task covers: a. Removal b. Installation INITIAL SETUP: Equipment Conditions: Materials/Parts: •    Battery disconnect switch in OFF position (see Two preformed packings TM 10-3930-659-10). •    Left engine upper sideshield opened (see TM 10- Personnel Required:  Two References: 3930-659-10). Tools/Test Equipment: TM 10-3930-659-10 •    General mechanic's tool kit (Item 44, Appendix F) a. REMOVAL 1. Remove four screws (3) and washers (2) from hydraulic reservoir (1). 2. Pull down hydraulic oil return filter (4) slightly, and remove nut (7) and terminal lead (6) from hydraulic oil filter restriction switch (5). 6-134

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