TM 10-3930-669-20 WARNING • High-pressure  hydraulics  [oil  under  3,000  psi  (20,.700  kPa)  pressure]  operate  this  equipment. Refer to vehicle operator and maintenance manuals for hydraulic oil pressure.  Never disconnect any hydraulic line or fitting without first dropping pressure to zero.  Failure to comply may result in injury to personnel. • Hydraulic oil is slippery and can cause falls.  To avoid injury, wipe up spilled oil with rags. VISUAL INSPECTION (1)  Remove cab floor plate (Para 15-12). (2)  Inspect stack valve tilt hoses and fittings  from  stack  valve  tilt  spool  to tilt cylinder for looseness and damage. (a)  If tilt hose fittings are loose, tighten fittings. (b)  If hose(s) and/or fittings are damaged, replace hose(s) and/or fittings (Para 17-10). (c)  If hoses and fittings are not loose or damaged, hoses are OK. VISUAL INSPECTION (1)  Open right-hand engine access cover (TM 10-3930-669-10). (2)  Inspect tilt control cable for damage. (a)  If tilt control cable Is damaged, replace tilt control cable (Para 17-3). (b)  If cable Is not damaged, adjust cable (Para 17-3). (c)  If cable Is not damaged or adjusted properly, cable is OK. 2-431