The easiest way (if not able to have someone else do it) is to grab a Hayne's manual at your neighborhood parts store. These manuals usually cover the basic information on routine maintenance and tear down (they are model specific books).
The 2003 Ford f250 did not come with an air cabin filter. There was a dealer install option but very few were ever put in.
Where can I find a free starter solenoid replacement diagram for 1988 ford f250
how to install a serpentine belt on 1989 f250 diesel 7.3l
Why don't you ask a mechanic?
he drives a Ford f250
Where can I find a diagram of a 1999 Ford F250 front disc brakes before I attempt to install them?
how to remove rear axle from 1988 f250 ford
I called the ford dealership and they had this in stock from the price range of $35-$40. It is also pretty easy to install. Good luck.
they are struts you must take out the old strut,take the springs out and put them in the new struts
shocks
shocks
1985-1988 ford f150 f250 and f350 or a 1994 f150 f250 and f350