S&W K22 Masterpiece maintenance

Schematic exploded views of S&W revolvers are readily
available on the internet to allow a person to learn the
nomenclature and also an idea of a part's function.

RTS LIST​

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1Extractor Rod
0Schematic w/ Parts List
2Center Pin
3Center Pin Spring
4Extractor Rod Collar
5Extractor Spring
6Gas Ring
7Cylinder
8Extractor Pin
9Extractor
10-18Rear Sight Assembly
10-18Rear Sight Assembly, Used Factory Original
10Rear Sight Leaf
20Thumbpiece Nut
21Thumbpiece
22Bolt
11Rear Sight Plunger
22Bolt / Cylinder Catch
12Rear Sight Plunger Spring
24Bolt Plunger
13Rear Sight Elevation Nut
15Rear Sight Spring Clip
14Rear Sight Windage Nut
16Rear Sight Elevation
26Rebound Slide Stud
17Rear Sight Slide
27Hammer Stud
28Trigger Stud
18Rear Sight Windage Screw
30Hammer Nose Bushing
29Frame Lug
19Rear Sight Leaf Screw Blued
32Sideplate
33Plate Screw
34Yoke Screw
23Bolt Plunger Spring
35Grip Pin
42Escutcheon
41 & 45Grips
43Grip Screw
44Escutcheon Nut
46Hammer
31Yoke
48Hammer Nose
50Sear Spring
49Sear
51Hammer Nose Rivet
52Sear Pin
53Stirrup
54Stirrup Pin
65Locking Bolt Spring
66Locking Bolt
55Strain Screw
56Barrel
64Locking Bolt Pin
67Cylinder Stop
68Cylinder Stop Spring
69Trigger
72Hand
70Trigger Lever
71Hand Torsion Spring
77Rebound Slide Spring
73Hand Pin
75Rebound Slide
76Rebound Slide Pin
78Hammer Block
82Cylinder Stop Stud
84Hand Spring Pin
NINot Illustrated
85Hand Spring Torsion Pin
86Trigger Lever Pin
74Trigger Stop
79 / 88Mainspring
87

The semi-hidden screw in the front of the trigger guard provides spring tension and positioning for the cylinder stop. Not necessary to remove, normally. You got lucky!

Frogfurr, congrats on having a fine, heirloom K-22 and approaching responsible maintenance. I, too, inherited a 5 screw K-22 Masterpiece (a 1955) from my father-in-law a few years ago. The first thing I did was buy Kuhnhausen's book. You will love it! I also got the factory letter for it so when I hand it down to my grandsons, they will have even more documentation from the firearm acquired new by the great grandfather. BYW, from his memory and from the factory letter, he bought it from the Chillicothe Hardware Store in Chillicothe, Oh. in 1955.