Welch Allyn Inc.
Aneroid Sphygmomanometers Service Manual
Revision A
Welch Allyn Inc.
Page 12 of 40
Section 3: Classic Hand Aneroid Gauge
3.1 Opening/Removing and Replacing Parts of the Hand
Gauge*
1. Pull bulb off of valve body (48S95).
2. Place the Hand Gauge into the Hand Gauge Fixture (T107569).
3. Remove the bezel by unscrewing it from the case and aside.
Remove the crystal and aside.
4. Remove the pointer by using the pointer removal tool (T105243A).
5. Pry out the dial by using a small flat head screwdriver.
6. Remove the cover of the Hand Gauge by unscrewing the two
screws (9P2651) with a Phillips head screwdriver.
7. Loosen the locking nut (32P527) from the capsule and remove
both from the case.
8. Remove the 9P1799 screws from the case and movement and
remove the movement from the case.
9. Remove the Thumbscrew by using tool # T113265 (Thumbscrew
wrench) and turning the thumbscrew counter-clock wise.
10. Remove the Thumbscrew valve body (42P252) using a 5/8”
socket.
11. Remove the valve body (48S95) from the case using a 1/2”
socket.
Reassemble in reverse order
* - See section 8.2 for an exploded view drawing of the Hand Gauge.
