It depends on which model you have.
theres a website j.c. Higgins model 88 has the exploded view with parts list
It looks to be an H&R model 120 or 121. Look for one of those manuals.
The best thing for you to do is to call S&W and get a manual from them.
how do you break down a jc higgins 101.16 bolt and instructions for removing bolt from rifle
Go to Remington.com and request a manaual.
Recommend you ask a gunsmith for assistance.
I found parts for my model 29 at Numrich Gun Parts in New York. Their web site is e-gunparts.com
Take it to a gunsmith.
How Do you breakdown sears model 5Caliber 22 s.l. or lr sears
Follow the instructions in the owner's manual