You have given a serial number instead of a model number, so I have no idea what deck you have. You could get the right numbers and try:
http://manuals.mtdproducts.com/mtd/public/list.jsp
A model number would tell what deck you have.
Changing the deck belt on the Huskee IT4200 lawn mower involves working around the spring and 2 belt drive guides in the motor area. Properly loading the spring before the guides is the secret to success.
Remove the deck. First by pulling the pins that attach the lift brackets, and then remove the rear spring, and the 2 belt guides under the engine for the belt that drives the deck (1/4" socket). After the deck is out, release the spring that applies tention on the right idler pulley (you'll have to remove the 2 side pulley covers).
It's in the water near the iceberg. You need to get a life saver and a rope and attach them to pull in the spring.
On the deck
Find an authorized repair center
You probably can but it is personal preference.
To attach an extension spring on an MTD (Montgomery Ward) lawn mower or similar equipment, first, ensure the machine is turned off and disconnected from any power source. Locate the two anchor points where the spring will attach, typically on the frame or the part that requires tension. Use pliers to stretch the spring slightly, then hook one end onto the first anchor point. Finally, stretch the spring further to hook the other end onto the second anchor point, ensuring it is securely attached and not twisted.
Hydraulic jack on base of spring or spring compressor Try this, it might be easier, remove the 2 bolts that's at the top of the steering knuckle that holds the knuckle on. Put the Ball Joint back in and attach it to the knuckle then swing the knuckle back up and attach it to the strunt arm again. Should be easier then wrestling with the spring.
The kickstand spring on a Harley Davidson Sportster motorcycle can be reattached by using a pair of pliers to stretch the spring. It has a considerable amount of tension and may require locking pliers.
To put the spring back on a coffee maker, first locate where the spring belongs. Then, carefully stretch the spring and attach it to its designated spot on the coffee maker. Be sure to secure it properly to ensure the coffee maker functions correctly.
You could use a ruler to measure its size, or a thermometer to measure its temperature.