Nexen QFB-2200 963999 - Manual (Page 8)

FORM NO. L-20297-C-0603 8
Figure 9
2
16
6
15
12
PARTS REPLACEMENT
FRICTION FACING REPLACEMENT
NOTE: Friction Facings (Item 3) must be replaced when
the gap between the Cylinder (Item 5) and Piston (Item
6) is approximately 1/32" [0.794 mm] after the Friction
Facing wear adjustment has been made (See Figure 8).
1. Alternately and evenly remove the twelve Socket
Head Cap Screws (Item 12) and Lock Washers
(Item 15) (See Figure 9).
2. Remove the Piston (Item 6) to free the Shims (Item
16) (See Figure 9).
3. Remove the Shims (Item 16) (See Figure 9).
4. Remove the Friction Plates (Item 19) and Drive
Discs (Item 4) (See Figure 10 for the DFB and
Figure 11 for the QFB).
NOTE: The DFB contains one Drive Disc (Item 4) and
one Friction Plate (Item 19) (See Figure 10). The QFB
contains two Drive Discs (Item 4) and two Friction Plates
(Item 19) (See Figure 11).
5. Remove the old Flat Head Screws (Item 11)
securing the old Friction Facings (Item 3) to the
Friction Plates (Item 19) (See Figure 10 for the
DFB and Figure 11 for the QFB).
6. Apply a drop of Loctite ® 242 to the threads of the
new Flat Head Screws (Item 11) and secure the
new Friction Facings (Item 3) to the Friction Plates
(Item 19) (See Figure 10 for the DFB and Figure 11
for the QFB).
7. Tighten the Flat Head Screws (Item 11) 60-65 in-lb
[6.77-7.34 Nm] torque.
8. Remove the old Flat Head Screws (Item 11)
securing the old Friction Facings (Item 3) to the
Housing (Item 2) (See Figure 10 for the DFB and
Figure 11 for the QFB).
9. Apply a drop of Loctite ® 242 to the threads of the
new Flat Head Screws (Item 11) and secure the
new Friction Facings (Item 3) to the Housing (Item
2) (See Figure 10 for the DFB and Figure 11 for
the QFB).
10. Tighten the new Flat Head Screws (Item 11) to 60-
65 in-lb [6.77-7.34 Nm] torque.
11. Reassemble the brake, installing the Shims (Item
16) (See Figures 9, 10, and 11).
Figure 8
Figure 10
DFB
Figure 11
2
3
4
3
19
11
2
3
19
4
3
19
11
19
11
4
1/32” [0.794 mm]
between Piston (Item 6)
and Cylinder (Item 5)
continued...