See the link below for the parts diagram.
How do you put WHAT. A pellets in the rifle, a BB in the rifle, Put it back together. your question is incomplete.
first of all it's best to determine the model number. Crosman has most of there manuals, both "Owners and Parts" manuals available to the public. You can post the question with the model number here or look up the parts manual at the link below. The parts manual will help you put the rifle back together..
This rifle was made for Sears using the Ted Williams brand name. It was made by Crosman and is really the Crosman model 160. It was made from 1962 -1971. See the link below for the parts diagram.
Crosman did not make BB guns until 1947, so there is no 1924 model BB pistol. Crosman did make their first BB rifle called the 1923 model. It had a plunger under the barrel to pump up the gun. Benjamin had been using this design on their pistols starting in 1935 but crosman never used it on a pistol only on the first model. Now back to the Crosman rifles, the second Crosman rifle was the 1924 model and it used a pump handle under the barrel to pump up the gun. Yes I have a photo of a Crosman 1924 model but "Answers" has no way of displaying photos, so sorry your out of luck. FYI: Crosman is spelled with one "s" not two. CROSMAN
Which model? All the different models are assembled differently. Crosman has made over 100 different models over the years.
See the Crosman link below.
See the link below for a view of the Crosman 766
The JC Higgins Model 21 is a pump shotgun, not a rifle. Reassembly should be done by a competent gunsmith.
Your question is somewhat incomplete. Both Crosman and Daisy made air guns for Sears under the JC Higgins Brand name. Any model that started with 126.xxxxx was made by Crosman, any model that started with 799.xxxxx was made by Daisy. So to answer your question, Both companies made JC Higgins air rifles going back to the 20's in both calibers .177 and .22. If you post all the model numbers I MAY be able to tell you more about your air rifle. The numbers that come after 126 identify the exact Crosman model.
You need a good gunsmith.
If the rifle is still under warranty then you can send it back to Crosman. Crosman owns Benjamin and Sheridan brand of air guns. (See the #1 link below) if it is an older one, then Crosman offers a service to locate repair shops that repair older Crosman, Benjamin and Sheridan products. see the #2 link below.
The only Winchester made lever action rifle was the model 88.I would refer you to a good gunsmith to put your model 88 lever action rifle back together again,as these rifles are complex and should not be attempted by a novice.