Fluke Calibration 4322-SYS-NAVAIR, Service Manual

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4322
Service Manual
4-34
previously with the marking visible.
15. Install the piston pump head along with the clippard valves. See “Piston Pump Head
Clippard Valves” on page 4-32.
16. Install the pump bracket assembly on the chassis. See “Pump Bracket” on page 4-16.
Precision, Isolation, and Control Valves and Backplane PCA
Use the following instructions to replace the precision, isolation, and control valves and
backplane PCA.
Precision Control Valve
Use the following instructions and reference Figure 4-18 to replace the precision control
valve (

).
1. Remove the two screws (

) that secure the precision control valve (

) to the
manifold (

). Make sure not to lose the o-ring (

) when removed.
2. Put the o-ring (

) in the new precision control valve (

) and secure it to the
manifold (

) with two screws (

).
Control Valves
Use the following instructions and reference Figure 4-18 to replace a control valve (items

,

, or

).
1. To replace a control valve (items

,

, or

), insert a small pointed screwdriver
into the side of the valve. Pry counterclockwise to remove the valve. Once loose,
remove by hand.
2. Screw in the new isolation valve by hand and hand tighten. Insert a small pointed
screwdriver into the side of the valve. Pry clockwise to tighten the valve.
Backplane PCA
Use the following instructions and reference Figure 4-18 to replace the backplane pca
(

).
1. Remove the manifold assembly from the chassis. See “Manifold” on page 4-18.
2. Remove the four screws (

) that secure the system manifold bracket (

) to the
manifold (

).
3. Remove the four screws and washers (

) that secure the backplane pca (

) to the
system manifold bracket (

).
4. Install the four screws and washers (

) to secure the new backplane pca (

) to the
system manifold bracket (

).
5. Install the four screws (

) that secure the system manifold bracket (

) to the
manifold (

).
6. Reinstall the manifold assembly into the chassis. See “Manifold” on page 4-18.