Troubleshooting, Friction facing wear adjustment – Nexen QFB-2500 964086 User Manual
Page 9
FORM NO. L-20117-F-0210
9
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P
FRICTION FACING WEAR ADJUSTMENT
NOTE: Friction Facing wear adjustment is not required for
DFB Series Brakes.
NOTE: When the QFB Series Brake facings are worn to
the point of required adjustment, the gap between
the Cylinder and Piston will close, thus preventing
brake engagement.
1. Unscrew Socket Head Cap Screws (Item 12)
approximately 1/8" and pull Piston (Item 6) loose to
free Shims (Items 16, 17, and 18) (See Figure 8).
2. Unscrew Socket Head Cap Screw (Item 12) until it is
free; then, remove four Adjustment Shims (Item 18)
that extend beyond the other Shims (Item 16 and 17)
(See Figure 8).
NOTE: Save the Shims that have been removed for
use when new Frictions Facings are installed.
3. Replace the Socket Head Cap Screw and Lock Washer.
4. Repeat Steps 2 -3 until the remaining Adjustment Shims
have been removed. Apply a drop of Loctite 242 to the
threads of the twelve Socket Head Cap Screws (Item
12).
5. Alternately and evenly tighten Socket Head Cap Screws
(Item 12) to recommended torque (See Table 5).
TABLE 5
L
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8
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1
1
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2
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8
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1
FIGURE 8
17
18
12
16
6 15