If a belt adjust is needed you will need a tool to compress the spring in the driven pulley before removing the c-clip which holds the assembly together. Between the two halves of the pulley, called sheeves are spacers. Add spacers to increase belt deflection, remove spacers to reduce deflection.

The rule of thumb is 0.1mm change in spacer thickness equals about 1.6mm in belt deflection. I recommend having one of each available spacer before taking the unit apart. The part numbers are:

92026-1569 0.6mm
92026-1617 0.8mm
92026-1565 1.0mm
92026-1570 1.4mm

The tool pictured used to compress the spring I borrowed. They are easily made from items found at any hardware store for under $5.00. The items are:

One piece of ½ inch all thread approximately 12 inches long.
One steel or cast pipe end cap with notches ground as shown in picture and ½" hole drilled in center.
One ½" locking nut
One ½" regular nut
Two flat washers

On the 650 Prairies the belt can be walked off the driven pulley easily. The 700 Prairies have a thicker belt and it is much more difficult to walk it off. For the 700s I recommend using a clutch puller, borrow one if you can. They can be purchased from EPI or Dalton for around $50.00 with shipping if you don’t know where to borrow one.

The spring pictured is the driven spring, if you want to replace it this is the time to do it. I use the EPI black springs to increase belt life. I would give a difficulty rating based on a scale of 1 to 10 a 7 first time. After the first time with the needed tools available I would rate this job a 4.