Service
6-28 P/N M/97-520
Drive Endcap Assembly
1. Apply light oil to the wedge ring in the seal head or O-ring.
2. Compress the seal head assembly and slide the seal head onto the
shaft until it bottoms out. Tighten the four set screws.
3. Using O-ring lube, lube the O-ring on the seal seat and finger press
the seal seat back into the drive endcap.
4. Turn the drive endcap over and insert the seal support and align the
notches to the back side of the seal seat.
5. Make sure both sealing faces are clean then apply light oil to both
sealing faces.
6. Place the drive endcap on the shaft and slide it down the shaft until
the sealing faces meet.
7. Install the first snap ring into the groove on the shaft.
8. Place the bearing support on the shaft and slide it down until it
bottoms out on the drive endcap.
9. Install and tighten the four drive endcap mounting screws.
10. Compress the seal head and place the second snap ring into the
groove on the shaft.
11. Install the drive shaft coupling and tighten the set screw.
12. Install the isolator.
13. Rotate the shaft and make sure it spins smoothly. If the shaft does
not spin smoothly, check for proper snap ring location, improperly
located seal components, or defective bearings.
14. Carefully install the drive endcap assembly into the measuring
chamber.
15. Install and tighten the mounting screws.
16. Connect the motor drive shaft to the drive endcap assembly.
17. Install the drive motor bracket on the measuring chamber in the
original position.
18. Install the drive motor bracket mounting screws and tighten.
19. Install the sensing endcap assembly.
Double Mechanical Seal Assembly Replacement
1. Remove the barrier fluid connections from the viscometer.
2. Note the orientation of the drive motor bracket and measuring
chamber. The bracket should be reinstalled in the same position
during assembly.
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