FORM NO. L-20294-G-0818
11
21
11
22
5
2
15
17
19
FIGURE 10
22
11
FIGURE 11
TABLE 4
11. Remove the Retaining Ring (Item 21).
12. Press the Piston Guide (Item 11) and Ball Bearing
(Item 22) off the Hub (Item 5).
13. Slide the Drive Ring (Item 2), Rotor (Item 17), and Shroud
(Item 15) off the Hub (Item 5).
14. Slide the Return Spring (Item 19) off the Hub (Item 5).
15. Press the old Ball Bearing (Item 22) out of the Piston Guide
(Item 11).
16. Clean the bearing bore of the Piston Guide (Item 11) with
fresh safety solvent, making sure all old Loctite
®
residue is
removed.
17. Apply an adequate amount of Loctite
®
680 to evenly coat
the outer race of the new Ball Bearing (Item 22).
18. Align the outer race of the new Ball Bearing (Item 22) with
the bearing bore of the Piston Guide (Item 11); then, press
the new Ball Bearing (Item 22) into place.
19. Using customer supplied .250-20 socket head cap screws,
thread three screws into tapped holes in Drive Ring (Item
2).
20. Alternately and evenly tighten three screws to press Drive
Ring (Item 2) and shroud (Item 15) off Ball Bearing (Item
23).
21. Remove customer supplied screws when press is complete.
22. Pull the old Ball Bearing (Item 23) off the Rotor
(Item 17).
23. Clean the bearing bore of the Drive Ring (Item 2) with fresh
safety solvent, making sure all old Loctite
®
residue is removed.
24. Apply an adequate amount of Loctite
®
680 to evenly coat
the outer race of the new Ball Bearing (Item 23).
25. Align the outer race of the new Ball Bearing (Item 23) with
the bearing bore of the Drive Ring (Item 2); then, press the
new Ball Bearing (Item 23) into place.
26. Press the Rotor (Item 17) into the Ball Bearing (Item 23) and
Drive Ring (Item 2).
NOTE
If you are replacing parts on the STC600, proceed with Step
1 for STC600. If you are replacing parts on the STC940,
proceed with Step 1 for STC940.
FIGURE 12
2
15
23
17
Customer supplied
.250-20 socket head cap screw.
TABLE 5
PARTS REPLACEMENT (continued)
CAUTION
Working with spring loaded or tension
loaded fasteners and devices can cause
injury. Wear safety glasses and take the
appropriate safety precautions.
MODEL
RECOMMENDED TORQUE
SOCKET HEAD CAP
SCREWS (ITEM 26)
STC600
50 In. Lbs. [5.6 Nm]
STC940
580 In. Lbs. [65.5 Nm]
DIAPHRAGM
O.D.
ITEM 12
ITEM 13
ITEM 14
STC600
1.25 In.
[31.75 mm]
1.50 In.
[38.10 mm]
1.75 In.
[44.45 mm]
STC940
2.25 In.
[57.15 mm]
2.50 In.
[63.50 mm]
2.75 In.
[69.85 mm]
