The trick to putting on most v belts is to understand the pulleys. The flat surfaced pulleys will contact the back of the belt. The v pulleys will face the v on the belt. On a chariot jr., you put the belt around the drive pulley on the motor first (v facing the pulley). From the front of the mower facing the seat, the left side of the belt comes up/around to the v blade pulley to your left. Next the belt goes around the idler pulley just to the right. Then the center blade pulley. At this point the belt actually will go around the idler tension pulley (the pulley with the spring attached to it.). But, you have two options here. To put the v belt around the blade v pulley to the far right first. Or, around the idler tension pulley first. Now here's where it gets tough. You have to take a crow bar or other type bar and pull the idler tension pulley around far enough to get the belt over it. That should do it.
V-belt pulleys are essential mechanical components that have been used for decades to transmit power in various industries.
Look carefully at the three pulleys the v-belt turns: One of these is the engine crank pulley and another is the AC pulley. The third pulley is the tensioner which must be backed off to remove the v-belt. Put a socket wrench to the bolt in the center of the pulley and loosen this bolt two-three turns, no more. The put a wrench to the adjusting nut/bolt which stands vertically with the plane of the pulley; loosen it until there is sufficient slack to remove the v-belt. Install a new belt in reverse order being certain not to over tighten the belt (should deflect 1/4-1/2" when moved by hand). Over tightening the belt will cause premature wear on the bearings of all pulleys.
You will need to loosen the tensioner pulley. Slide the tensioner pulley to the right and the serpentine belt will become loose. Remove the old serpentine belt and put the new serpentine belt on. Slide the tensioner pulley to the left and tighten it.
Changing a JD STX38 transmission drive belt.Today I undertook removing my almost failed transmission drive belt on a John Deere STX38. In order to do so (it had come off both the engine pulley and the transmission pulley but was not broken), I had to unbolt the brake pedal lock pin, and disconnect the front wheel steering bars (cotter pin and washer holding each bar to the front wheel axels). The belt then could be removed as the steering arms pass under the belt when it is in place, and the bars are attached by cotter pin and washer, one set at the wheels, and another set at the steering arms in the middle of the chassis. There is one idler pulley in a v shape and another idler pulley that is flattened between the transmission and the steering arms. The back of the belt pushes against the flattened pulley, and the inside (v side) of the belt passes the v shaped pulley as these 2 pulleys provide belt tension.
Begin by loosening the tensioner pulley. Slide the tensioner pulley to the right. The old serpentine belt will become loose and can be removed. Put the new serpentine belt on and reverse a process.
There should be a belt tensioner pulley that is able to slide back and forth to tention the belt. Loosen that fully then take the belt off that will also be the same for the alternator if it is a V-belt Drive. if it is a serpentine belt the one belt will release the pressure from All the Pulley's.
there should be an adjustable tensioner pulley.
it is not spring loaded, the pulley is adjustable
Loosen the pulley first and then the belt should loosen off the tracks., follow the diagram on the hood
Loosen the belt tensioner pulley and after removing the old belt replace it with the new belt making sure it is re-installed in the same manner as the old. (there should be a belt diagram somewhere in the under-hood area that shows this) After installing the new belt, re-tighten the belt tensioner pulley.
Loosen the timing belt adjustment pulley located on the side of the engine. When the pulley creates enough slack slide the new belt onto the cams. Make sure the cams are aligned correctly.