Spool Valve Cover - Flowserve Logix 3400MD User Instructions

Figure 12: Driver Module Assembly
Figure 13: Spool Valve Cover Assembly
1. Make sure the valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the driver module cover (Figure 15), using a flat bar or
plate in the slot to turn the cover.
4. Remove the spool valve cover by removing the screw and sliding
the cover assembly backwards until the tab is clear of the slot
(Figure 13). The sheet metal cap, hydrophobic filter, and O-ring
should be removed with the spool valve cover. It is not necessary to
take these parts out of the spool valve cover.
5. Being careful not to lose the nylon washer, remove the Phillips-
head screw that attaches the driver module to the main housing
(Figure 14).
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Logix 3400MD Digital Positioner FCD LGENIM3404-00 – 9/09
Figure 14: Spool and Block
0 WARNING: Spool (extending from the driver module
assembly) is easily damaged. Use extreme caution when
handling spool and spool valve block. Do not handle
the spool by the machined portions of spool. The toler-
ances between the block and spool are extremely tight.
Contamination in the block or on the spool may cause the
spool to hang.
Figure 15: Driver Module Barbed Fitting
6. Remove the spool valve block by removing the two Phillips-head
screws and carefully sliding the block off the spool (Figure 14).
7. Carefully remove the spool by sliding the end of the spool out of the
connection clip. Excessive force may bend spool.
8. Remove the main cover.
9. Remove the plastic board cover by removing the three retaining
screws (see Figure 16).
10. Disconnect the flexible tubing from the barbed fitting at the driver
module assembly (see Figure 15).
11. Use the 1/4" nutdriver to remove the barbed fitting from the driver
module assembly.
12. Unplug the two wiring connections that link the driver module
assembly to the main PCB assembly.