How does the torsion attach to the deflector and lawn mower deck of a 52" mowing deck ?

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check out the video

https://www.google.com/search?q=husqvarna+riding+mower+reattach+mower+deck+lift+torsion+spring

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Safety and Preparation Serious injury can occur if the engine or mower blades accidentally start while you are working with lawn tractors. To prevent this, drive the Murray lawn tractor onto a flat work surface and disengage the mowing deck cutting blades. Engage the parking brake to keep the mower from moving; chock the wheels with a wooden block or brick. Adjust the mowing deck to the lowest position. Turn off the engine and remove the key from the ignition. While not necessary, you may even wish to disconnect the spark plug wire from the spark plug. Mowing Deck Removal You must remove the mowing deck on a Murray lawn tractor to gain access to the belts. Remove the adjustment rod hairpins, followed by the adjustment rod pins from the front left and right sides of the mowing deck. At the rear on the left and right sides, pull out the retaining hairpins and slide the mowing deck suspension links from the adjuster plates to separate the rear mowing deck from the frame. Remove the blade control rod stud, including the hairpin and washer, from the top of the blade control lever shift linkage at the left rear of the deck. Remove the front hanger rod, including the hairpin and flat washer that hold the rod in place. Loosen the belt guide retaining bolts with a socket wrench and remove the engine stack pulley belt so you can slide the mower deck out from under the tractor Transmission Drive Belt Installation Slide the new transmission drive belt between the engine stack pulley belt guides, over the belt guide plate and under the engine stack pulley. Fit the transmission drive belt around the top engine stack pulley. Push the free end of the transmission drive belt up through the transmission shifter hole in the lawn tractor floorboard. Slip the transmission drive belt loop over the transmission shifter. Pull the transmission drive belt down through the transmission shifter hole. Fit the transmission drive belt around the transmission drive pulley and tighten the transmission drive pulley belt guide retaining bolts to hold it in place. Fit the transmission drive belt flat side around the idler pulley. Slide the idler pulley onto the idler pulley stud while holding the belt in place. Tighten the transmission idler pulley retaining nut with a socket wrench to secure the idler pulley to the idler pulley stud. Mowing Deck Drive Belt Installation Pull back on the right side mowing deck mandrel pulley spring-tensioned belt retainer. Guide the new mowing deck drive belt around the right side mandrel pulley and release the belt retainer. Pull the drive belt spring-tensioned retainer away from the mowing deck idler pulley, guiding the deck drive belt around the idler pulley. Fit the mowing deck drive belt around the left side mandrel pulley and under the rear mowing deck cross link rod between the right and left side mandrel pulley. Slide the mowing deck under the right side lawn tractor frame, reconnecting the deck to the frame in reverse order of removal. Engage and disengage the mower deck while driving the mower to test the belt for proper operation.

Very simple. The 6 inch or so pin that holds it on is retained by a clip on one end. To remove clip use a pair of pliers. If you work steadily and carefully you will be able to reuse this clip. After removing clip, pull the pin out. Old deflector and spring be removed now. To get the spring right you have to try it in position before installing it. Just remember that the spring is holding the deflector down so when you are done installing, when you pick up on the deflector there is pressure holding it down. Don't put the pin clip on until you verify the spring force is correct because getting that spring clip off is the Hardesty pay off the job.

You have to hold the spring and deflector in the loaded position (forcing against the spring force) while you feed the pin thru the deflector and spring and back thru the deflector and intor the deck bracket.

if you look under lawn mower were the deck attachs you will see the adjustment rods unhook one at a time to adjust ether screw the rod in or out do this on a driveway so you can measure with the tape measure how for you or lifting deck and can match hight on both sides

Clean spring area or replace deflector.

Where does it go the mower deck or the engine. On a John Deere rider like we have , it goes on the mower deck that is located under the tractor or mower. On the right side ( when sitting on seat) ours is on the right and it is for the bag or box attachment for clippings and or debris. A plastic cover is held on by a short rubber bungie on each side that as a hook on each end and it hooks around a small bracket to the front and a small bracket to the rear...Do you still have owners manual ?. most guys keep them in some drawer or shelf in the garage or tool shed area ...good luck...

Look, lower deck as low as it will go, look above deck, under the tractor and pull any pins holding deck to the control arms etc., and remove belt sufficiently to slide deck out from below tractor, I advise you to take pictures to make assy. easy.
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Find a level surface (concrete garage floor for example) ... adjust front to back ... use a tape meadure to mneasure floor to deck edge ... then adjust side to side.

the proper set up on thre bar which hols thr springs is plate lock handle part 107-3946 then the right hand torsion spring 108-0953,make sure the spring hooks over the plate lock, then left hand torsion spring then bar slides through left hand hole and lever release 40-1823-03 attaches to end of bar with a set screw