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)  Position cab for service (Para 15-2). (2)  Inspect hydraulic pump main hydraulic hose and fittings for looseness and damage. (a)  It main hydraulic hose fittings are loose, tighten fittings. (b)  If hose and/or fittings are damaged, replace hose and/or fittings (Para 17-10).  Go to Step 3 of this Fault. (c)  If main hydraulic hose and fittings are not loose or damaged. Perform Step (3) below and go to Step 3 of this Fault. (3)  Install cab (Para 15-2). 2-425