TM 10-3930-664-10 Location Item Interval Item to Procedure Not Fully Mission No. Check/ Capable If: Service RIGHT SIDE TRANSMISSION COVER 7 Engine Oil Level Check oil level dipstick.  Maintain Oil level is below the oil level between the "ADD" and "ADD" mark. "FULL" marks.  Refer to LO10- 3930-664-12. CAUTION When operating in desert or extremely dusty conditions, clean the Air Cleaner Element after every 4 hours of operation. 8 Air Restriction Check air restriction indication. Indicator shows full red Indicator If service indicator window shows on gauge. fully red, clean air filter element. Refer to paragraph 3-10. HYDRAULIC TANK 9 Before Hydraulic Oil Level    With mast lowered to ground No oil is visible in sight level and wheels straight forward, gauge. check oil level in hydraulic tank. Oil should be at the LOW mark on the sight gauge.  Refer to LO 10-3930-664-12. NOTE Check No.  9 must be performed if your 4KRTFL is equipped with an enclosed cab. CAB 10 Before Windows Check windows for obvious Vision is distorted due to damage and broken or cracked crack in windshield. windows. SEAT 11 Before Seat Adjustment Check seat adjustment latch for Seat adjustment latch is Latch proper operation. inoperative or broken. 12 Before Seat Belt Check seat belt for proper If seat belt becomes operation. unserviceable or latch inoperative. 2-20