10
FORM NO. L-20294-E-1209
15. Reinstall the Retaining Ring (Item 21).
16. Slide the End cap (Item 3) and Cylinder (Item 1) onto the
Hub (Item 5).
17. Apply a drop of Loctite
®
242 to the threads of the six Socket
Head Cap Screws (Item 25) and secure the End cap (Item
3) and Cylinder (Item 1) to the Piston Guide (Item 11).
NOTE
Ensure the Pistons (Items 8, 9, and 10) do not bind between
the Diaphragms (Items 12, 13, and 14) and Piston Guide
(Item 11) when the Socket Head Cap Screws (Item 25)
are tightened.
18. Alternately and evenly tighten the six Socket Head Cap
Screws (Item 25) to the recommended torque (See Table 3).
TABLE 3
PARTS REPLACEMENT
DISASSEMBLY
STC600 and STC940
Refer to Figures 8 - 12.
1. Remove the six Socket Head Cap Screws (Item 25).
2. Remove the End cap (Item 3) and Cylinder (Item 1).
3. Remove the six Socket Head Cap Screws (Item 26); then,
separate the Cylinder (Item 1) from the End cap (Item 3).
NOTE
There are three sizes of Diaphragms (See Table 4). When
replacing the six Diaphragms, make sure the correct size
Diaphragm is used for each Diaphragm location.
4. Remove the six old Diaphragms (Items 12, 13, and 14) from
the End cap (Item 3).
NOTE
On STC600, the O-Rings are (Item 31). On STC940, the
O-Rings are (Item 33).
5. Remove the six old O-Rings (Item 31 or 33) from the ends
of the Pistons (Items 8, 9, and 10).
6. Install the six new Diaphragms (Items 12, 13, and 14) into
their respective locations in the End cap (Item 3).
7. Match the Pistons (Items 8, 9, and 10) in the Cylinder (Item
1) with the Diaphragms (Items 12, 13, and 14) in the End
cap (Item 3).
8. Install six new O-Rings (Item 31 or 33) onto the ends of the
Pistons (Items 8, 9, and 10).
9. Apply a drop of Loctite
®
242 to the threads of the six Socket
Head Cap Screws (Item 26) and secure the End cap (Item
3) to the Cylinder (Item 1).
10. Alternately and evenly tighten the six Socket Head Cap
Screws (Item 26) to the recommended torque (See Table 5).
1
3
25
FIGURE 8
FIGURE 9
26
3
13
14
12
12
14
13
1
31/33
FRICTION FACING REPLACEMENT (continued)
MODEL
RECOMMENDED TORQUE
SOCKET HEAD CAP
SCREWS (ITEM 25)
STC600 45 In. Lbs. [5.1 Nm]
STC940 143 In. Lbs. [16.2 Nm]
NOTE
The following sections are arranged by model. Verify that you are in the correct section for your model.
(13 pages)
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