Ive taken the drum out of simspon maxidry 1200 and replaced blown heating element, but now im not sure where the idler pulley and spring attach on the drive motor/ drum drive belt as they got bumped out of position when i took the drum belt off and removed the drum.it seems to have a fork and 2 slots at motor mount ?

The loud, constant squeak/squeal from your Frigidaire dryer, combined with a burning smell, indicates a serious problem that needs to be addressed. While replacing the drum bearing kit was a good step, it appears that there may be other issues at play.
One possible cause of the squeaking could be a worn or damaged drive belt or idler pulley. If the idler pulley spring came off, it is possible that the belt is not properly tensioned and may be slipping or rubbing against the drum, causing the squeaking noise. Additionally, a slipping belt can generate a burning smell as it heats up from the friction.
Another possible cause of the burning smell could be a malfunctioning heating element, which may be overheating the dryer and causing the burning odor.
It is recommended that you stop using the dryer immediately and unplug it from the power source. It is not safe to continue using a dryer that is producing a burning smell.

Bradley,
Just saw your other question. The heating element is located below and behind the drum. You will have to remove the front panel and the drum to gain access to the heating element. Be sure to unplug your dryer before attempting any repairs. Also, since you will be removing the drum, make sure that you take note of how the belt goes around the motor and idler pulley. You should also take a good look at your belt, might be a good time to replace it while you are in that deep. If it has tiny cracks on the inside, I would recommend replacing it. Hope this helps!

1st, Unplug the Dryer from the Power Supply.
You will need the Exact recommended Replacement "Idler Pulley".
With the Belt Ribs Facing Toward the Dryer Drum, position the belt on the tell tale Ring Mark on the Drum letting the Belt Hang Down below the Drum.
Place The New Idler Pulley into the Slots on the Inside Dryer Bottom located near the Motor Mounted Pulley.
(Face The Idler Pulley Toward The Motor Mounted Pulley)
(Hold the Idler Pulley in place in the slots)
Take the "Hanging Belt" & run the Whole Loop "UNDER" the Idler Pulley & then
Attach the "Belt Loop" "AROUND" The Motor Mounted Pulley.
That should do it.
Put the rest of the Dryer Back Together...Done!
Good Luck,
Vinnie

Tension is typically applied by a non adjusting spring loaded idler pulley.

The idler pulley/tensioner fastens into two slots in the base of the dryer to the left of the motor . The belt goes around the drum then through the idler to the motor pulley ,you have to make a loop with the excess belt and feed it through the idler pulley, i normally pull the plastic pulley towards the right side of the dryer to give enough belt to go around the motor pulley then let the plastic pulley rest on the backside of the belt. do not turn the drum too much as you may pull the belt back off .

That is the spring for the idler wheel bracket...

ALWAYS UNPLUG YOUR DRYER BEFORE ATTEMPTING TO DO ANY WORK ON IT.
Sounds like your problem may be the belt may have slipped off of the idler arm pulley.
If you have to check/replace/repair your drum motor,drum seals,belt,rollers, etc.
If replacing drum seals be sure to use a good grade of weather proof cement to hold the seal/s in place, some seals are furnished with the cement to glue it in place.
Note: This method works for most front loading machines.
Remove the electrical console that holds the timer switch, start switch, etc. from the top of the dryer. Be real careful not to knock any of the wires off of the timer switch or other electrical connections.
Remove the lint filter and the screws that hold the filter housing.
Then remove the top of the dryer.
Note: Some of the tops tilt backwards and do not have to be removed completly.
Remove the front of the machine, this will expose the belt and drum, remove the drum and belt and this will expose the drum rollers, idler arm bracket with pulley, and motor with pulley. Pay attention to the route of the belt, this will come in handy when you go to reinstall the belt and drum.
Sometimes the belt will slip off of the idler arm or motor causing the drum not to turn.
Note:The way the belt goes back on is, as the belt comes off the drum has to be doubled (pushed together to form a loop) and goes under the idler pulley then to the motor.
While you have the drum out, I would recommend that you lubricate the drum rollers at the shaft of the roller with a good grade of machine oil like 3 in One oil. This will save you a problem later with the rollers getting noisy, also check your drum rollers for flat spots, if they have flat spots on them this will cause a thumping type noise. You will need to replace the drum rollers if they have flat spots on them.
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Hi there, There is a switch at the bottom of the dryer. It has a groove for the spring to fit around. Then the spring goes through the metal tag with the holes in the pulley. The pulleys 2 prongs then fits into the slot near the motor. The belt goes through the pulley and around the motor wheel. When fitting the drum, tape the belt at three points on the drum with the machine door facing down making installation easier. Once installed remove the tape. The dryer now works like a dream. See the attached photo. Good Luck!

A roller or and idler most likely.
I have so repair photos and a manual HERE

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

put it around drum,then around motor pulley, then idler pulley with spring attached to, move it forward and slip belt onto idler pulley and release and belt should become tight,then self align belt by manually turning drum before putting unit together

Idler pulley and spring have come off while cleaning dust from inside cabinet a diagram whould be a great help as Im 500kms from nearest service place simpson maxidry 1000p Ray bushed