Fluke Calibration 4322-SYS-NAVAIR, Service Manual

Page: 88 / 186

4322
Service Manual
4-36
NC Isolation Valve
Use the following instructions and reference Figure 4-19 to replace the NC isolation
valve (

).
1. With a soft grip pair of channel locks, turn the NC isolation valve (

)
counterclockwise to remove.
2. Remove the four screws (

) that attach base of the NC isolation valve to the
manifold assembly.
3. Remove the valve body (

) from the manifold assembly.
4. Put the new valve body (

) into the manifold assembly.
5. Install the four screws (

) that attach base of the NC isolation valve to the manifold
assembly.
6. With a soft grip pair of channel locks, turn the NC isolation valve (

) clockwise to
install.
2
1
3
4
Isolation Valve
Shown Fully Assembled
hbx037.eps
Figure 4-19. NC Isolation Valve
PCAs
Use the following instructions to gain access to the electronics box to replace the
processor pca, the main pca, or the power supply pca. These pca assemblies listed can be
accessed from the front of the electronics box without any additional tear down. If the
amplifier pca assemblies on the back of the main pca need to be replaced, the electronic
box needs to be removed to remove the screws that attach it to the metal pca cover.