Fluke Calibration P3031, User Manual

Page: 27 / 36

Maintenance & Servicing
Top Plate Removal
5
5-5
Table 5-2. PCU Housing Assembly - Parts List
Item Description Part
1 O-ring 3867582
2 Screw 3910035
3 Cylinder Holder 3919202
4 O-ring 3867594
5 PCU Housing 3867582
6 Filler Plug 3919233
7 Drain Plug 3919233
8 O-ring 3867575
Top Plate Removal
Note
In order to perform maintenance procedures on the pneumatic system, the
Top Plate Assembly must first be removed from the instrument case.
1. Depressurize the system by slowly opening the Exhaust valve.
2. Disconnect any DUT from the test port.
3. Drain the PCU lubricating fluid as described above in Chapter 5, Draining PCU Fluid.
4. Remove the capstan spokes from the screw press hub.
5. Remove the 4 screws from the instrument top plate, (1 at the mid-point of each edge).
W
Caution
The top plate will be connected to the instrument case by the
tubing that runs to the external supply manifold, so care must
be taken when lifting the plate to avoid damage to these
connections.
6. Hold the top plate assembly by the test port, and tilt the plate so that the rear edge is
lifted, but the front edge remains in contact with the instrument case.
7. Slide the top plate towards the rear until the screw press hub is clear of the front lip
of the instrument case.
8. Carefully lift the top plate to reveal the inlet connection from the external supply
manifold (mounted on the rear panel of the case).
9. Disconnect the tubing, and lift the top plate clear of the case.
W
Caution
When handling the top plate assembly, it is good practice to
remove the piston assemblies to avoid accidental damage.
Note
Replacement is simply the reverse of the above procedure.