I will assume you are regarding the pulley for the power steering? If so to loosen it use a socket on the top of the pulley it should have a flat head style appearance.Loosen it clockwise and then the big nut on front of the pulley is a 7/8 inch combination wrench loosen it and the pulley should slide down to make the PS belt loose.This pulley is kind of weird but,by loosening the top bolt (metric) the bolt will come up as you take the tension off.Then YOU defenitely have to loosen the nut on the front of the pulley itself which alloys the pulley to move up or down.To adjust back with new belt on run the top bolt which is behind the pulley with the flat head cut in it run it down tight then tighten the nut on front of the pulley this locks the pulley in place so it will not move.Hope this helps.If this question is in reference to the tensioner for the timing belt resubmit your question.
the tensioner is spring loaded,be very careful. why do you need to loosen it. its all about leverage if you need to remove the belt use a 3/8in ratchet in square hole near bottom of tensioner
MY 1992 MAZDA B2200 PICKUP RUNS GREAT FOR A SHORT TIME AND THEN SEEMS TO STARVE ITSELF WHEN I GO TO GIVE IT FUEL ALMOST TO THE POINT WHERE IT WON'T RUN IF I TURN THE ENGINE OFF FOR A FEW SECONDS IT WILL GO GOOD AGAIN BUT ONLY TO REPEAT THE PROBLEM OVER AGAIN
I will assume that you are replacing the belt here. The tensioner has a large bolt on the front of it, find a socket to fit and pull or push, which ever way seems to loosen it for you, they are automatically adjusting so when reapplying the belt just move it out of the way again and slowly release it back onto the belt.
i would go for a new clutch assembly first
What seems to be your problem
There is no adjustment you can do. It has an automatic self adjusting belt tensioner. If the belt seems to loose you may need to replace the tensioner and belt.
Try this site, it seems they know all about Mazda http://www.mazda626.net/index.php?showtopic=5276
Try checking out your catalytic converter. it may be plugged which causes you engine to die after you drive it for a bit. try checking your gas for water that may be the problem also chek your fuel filter it may be plugged.
The code means "Charging system voltage too low". The PCM (computer) is not seeing the correct voltage from the alternator. Before you start ripping apart the engine to remove the alternator, check the serpentine belt tension. The tensioner pulley spring is prone to rusting and sticking, which causes the belt to slip on the pulleys driving the alternator, water pump, power steering pump etc. If the belt tension seems good (stiff, with very little give) have the alternator checked at the auto parts store (requires removal). If the belt seems loose, squirt some oil onto the spring of the tensioner pulley, and work it back and forth with a 15mm box end wrench attached to the bolt on the front of the pulley. Clockwise will loosen the belt, then release a few times. Squirt the oil (I use motor oil) into the slit on the top of the tensioner assembly, which is located below and to the left of the alternator, just to the right of the ignition coil. Obvoiusly, you should avoid getting oil on the belt. If the spring doesn't loosen, changing out the tensioner is a snap. Good luck!
this seems to be a popular problem, so please check some of the boards with the same name, atleast one of the 140 must have an answer for you
The belt is adjusted by the tensioner, which generally isn't adjustable unless the spring has started to fail or break. If the belt is slipping or making noise check it for cracks on the ribbed side. If you see any cracks, replace the belt. If the tensioner seems soft, it too can be replaced.
Over time a belt can stretch to the point where the tensioner can no longer keep proper tension on it, or if it is an adjustable tensioner it may need tightening. Also one of the pulleys or driven accessories may be failing and not able to keep up the same speed as the belt is turning so it makes noise. Failing or dry bearings may be the culprit if the noise seems to be coming from the tensioner.