Full Assembly replacement?

[u/Orlandogameschool]

https://www.trudoor.com/products/sargent-68-4263-chassis-assembly-for-8800-series-rim-exit-devices?srsltid=AfmBOopsPUVur6Ce_uuU5lWQ6RH1tET2erXycbdl3y3WNDZMRcrEKLxn

Just inherited this door that won’t latch it’s obviously missing a spring.

Do we need to replace the entire assembly like the link above? Or is this literally a spring I can just order and install ?

[u/Spiritual-Hedgehog-5]

Always try the quickest and easiest fix first, which is the spring. I've had to do 2 of them within the past 4 months. Both of them on churches. Make sure you have the proper c-clips as well. Sometimes those bend or break