Re: MAZDA B3000 same as a ford rangernew here
Welcome and as others are saying the pump whine is pretty common... I drove a B3000 from 95 till 2010 240K and noise but never a problem. One thing to check is to follow the procedure in the manual exactly to ensure someone not following the procedure didn't overfill the power steering fluid.
2010 B4000 4x4 SE+
mods:Tinted windows,Line-X,BAK Rail Caps,rust proofing, stebel natilus air horn,ScanGauge II,hitch reciever cover, Belkin Iphone mount charger, rubbermaid floor mats, hose clamp tailgate, mud flap delete, Cargo light 3rd brake light, explorer lighted visors, mustang dome light, fog light mod, Mountaineer ohc, bosch evolution wipers, GenK51a mirror,Kenwood p680c speakers, Underhood LED's, Ranger winter rims 245/75-16 Blizzak DMV-1's, 180lbs winter bed weight