It is common for this little power steering idler bearing to wear out. Don't loose your nice steering system as a result! Replace your high mileage bearing or pick up one as a spare!
Genuine Toyota part Made In Japan. 
Applications include all 1979-1995 20R, 22R, 22R-E, and 22R-TE, 2WD or 4WD Pickups and 4Runners.
WARNING: California's Proposition 65