Screw Pump Assembly - Fluke P5515-V User Manual

3. Remove the spokes from the hub on the front of the instrument.
4. Remove the 4 screws from the instrument top plate, (1 at the mid-point of each edge).
5. 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.
6. Slide the top plate towards the rear until the capstan hub is clear of the front lip of the
instrument case.
7. Lift out the top plate assembly.

Screw Pump Assembly

1. Unscrew the large union nut (just behind the inner hub) of the screw press assembly.
2. Withdraw the lead screw assembly from the barrel (4), taking care not to drop the
rambler assembly (8).
3. The white, anti-extrusion ring (7) is a PTFE spiral, and can be removed by
“unwinding” it from the rambler.
4. When removing the rambler seal (6), take care not to use any tool that may have a
sharp edge that will scratch the surfaces of the rambler, otherwise it may leak when
reassembled.
5. The replacement rambler seal can be eased over the front of the rambler, and into the
groove.
6. Similarly, the new anti-extrusion ring can be “wound” into the groove in the rambler,
behind the rambler seal.
7. If it is necessary to remove the barrel (4), the locknut (3) must be loosened
approximately ½ turn. The barrel can then be unscrewed from the test station (1).
It is often easier to remove the barrel support bracket (5) to allow greater
movement, (remove the 2 screws from the upper side of the top plate).
8. Before re-fitting the barrel, ensure that the barrel seal (2) is correctly located in the
counter-bore in the front of the barrel. Screw the barrel fully in to the test station, and
secure with the locknut.
9. Re-align the barrel support bracket (if removed), and secure through the top plate
with the 2 screws.
10. Ensure that the rambler assembly is correctly located on the end of the lead screw
assembly. Carefully introduce the rambler into the open end of the barrel; making
sure that it does not tilt when entering the barrel.
11. Push the lead screw assembly fully in to the barrel, ensuring that the key in the nut
locates correctly in the slot in the barrel.
12. Re-tighten the barrel union nut.
If the lead screw assembly shows signs of excessive wear, then
it is very likely that the associated components have worn also;
therefore, the screw press assembly is available as a spare
part — see diagrams for part numbers.
Note
Caution
Hydraulic Comparison Test Pump
Maintenance and Servicing