Repair 6-7Part 104373ā03 2015 Nordson Corporation3. Install new O-rings (6) and backup rings (5) on a new seat. Lubricatethe O-rings with O-ring grease.4. Place new balls in the hydraulic housings.5. Press new seats into the hydraulic housing, with the internal threadstoward the outside, opposite the ball.NOTE: If necessary, tap the seats in place with a rubber mallet.6. Replace the O-rings (3) in the groove in the bottom of the hydraulichousings.7. Install the siphon manifold on the hydraulic housings with the screws,lock washers, and flat washers removed in step 1.82111094565731Figure 6-6 Siphon Ball Check Rebuild1. Hydraulic housings2. Seats3. O-rings4. Siphon housing5. Back-up rings6. O-rings7. Balls8. Seat removal tool (7 /8 -14 x 2.25 in.screw)9. Flat washers10. Lock washers11. ScrewsHigh-Pressure Ball Check Valve RebuildRebuild both high-pressure ball check valves at the same time.1. See Figure 6-2. Remove the hydraulic housings from the solventchamber.2. See Figure 6-6. Remove the siphon manifold from the hydraulichousings.
