Nexen QFB-2500 964086 - Manual (Page 5)

FORM NO. L-20117-F-0210 5
L E D O M R E T E M A I D T O L I P E L C R I C T L O B
0 5 1 1 - B F D
0 5 1 1 - B F Q
. n I 5 7 3 . 1 1
] m m 9 . 8 8 2 [
. n I 0 5 7 . 4 1 n o 6
] m m 7 . 4 7 3 [
0 5 6 1 - B F D
0 5 6 1 - B F Q
. n I 0 5 2 . 6 1
] m m 8 . 8 1 4 [
. n I 0 0 0 . 0 2 n o 2 1
] m m 0 . 8 0 5 [
0 0 2 2 - B F D
0 0 2 2 - B F Q
. n I 5 7 3 . 1 2
] m m 9 . 2 4 5 [
. n I 0 0 5 . 5 2 n o 2 1
] m m 7 . 7 4 6 [
0 0 5 2 - B F D
0 0 5 2 - B F Q
. n I 5 7 3 . 4 2
] m m 1 . 9 1 6 [
. n I 0 5 7 . 8 2 n o 2 1
] m m 3 . 0 3 7 [
INSTALLATION
NOTE: Nexen’s spring engaged, air disengaged Dual Faced Brakes (DFB) and Quad Faced Brakes (QFB) are designed
for horizontal shaft mounting only.
Nexen’s DFB and QFB elements are partially assembled at the factory. Before installation, separate the elements
into subassemblies as shown (See Figures 1 and 2).
Hub Friction Plate
Assembly
Friction Plate
Assembly
Shims
Housing/Facing
Assembly
Disc
Assembly
FIGURE 2
QFB
Cylinder, Piston/
Pressure Plate
Assembly
Friction Plate
Assembly
Hub
Housing/Facing
Assembly
Disc
Assembly
Cylinder, Piston/
Pressure Plate
Assembly
Shims
FIGURE 1
DFB
1. Provide a piloting flange and 5/8-11 tapped holes in
the bearing supported device or machine component
prior to installing the housing (See Table 1 for Pilot
Diameter and Bolt Circle).
2. Attach the Housing/Facing Assembly to the bearing
supported device or machine frame using customer
supplied Grade 8, 5/8-11 Socket Head Cap Screws.
NOTE: Control perpendicularity between the shaft and
housing mounting surface. Use a Dial Indicator
for measurements. Perpendicularity should be
less than 0.015 TIR (See Figure 3).
3. Apply Loctite ® 242 to the threads and tighten 5/8-11
Socket Head Cap Screws to recommended torque
(See Table 2).
4. Install customer supplied key into shaft.
5. Lubricate Hub splines (Item 1) with Never-Seez ® or an
equivalent high temperature, anti-seize lubricant.
6. Slide Hub (Item 1) over key and onto shaft (See Figures
1 and 2).
TABLE 1
FIGURE 3
Dial Indicator