Nexen DFE-2500 964009 - Manual (Page 5)

FORM NO. L-20021-E-0110 5
INSTALLATION- BRAKE
NOTE: The DFE and QFE Elements are partially assembled
at the factory. Separate the Elements into sub-
assemblies before installation.
DFE
Refer to Figures 1 & 2.
1. Provide a piloting flange and 5/8-11 tapped holes to
a non-rotating surface of the machine.
NOTE: Control perpendicularity between the machine
shaft and the mounting surface of the Housing
(Item 2) as the cap screws are tightened. Use
a dial indicator for measurements and the
machine surfaces of the housing posts as a
reference surface. Perpendicularity should be
less than 0.015'' [0.381 mm].
2. Using customer supplied cap screws, secure the
Housing (Item 2) to the non-rotating part of the machine.
3. Tighten the customer supplied cap screws to 233 Ft.
Lbs. [315.90 Nm] torque.
4. Install a customer supplied key into the shaft; then,
slide the Hub (Item 1) onto the shaft.
NOTE: The axial location of the Hub (Item 1) is critical
to the proper operation of the DFE—BRAKE.
Refer to Table 1 and Figure 2 for correct Hub
location.
5. Using a customer supplied set screw, secure the Hub
(Item 1) to the machine shaft.
6. Coat the teeth of the Hub (Item 1) with Never-Seez ® .
7. Slide the Disc Assembly (Item 4) onto the Hub (Item
1).
NOTE: On DFE 1650 and DFE 2200 the Piston and
Pressure Plate are one item.
8. Assemble the Cylinder (Item 5), Piston (Item 6), and
Pressure Plate (Item 7) to the Housing (Item 2).
9. Using the Cap Screws (Item 14) and Lockwashers
(Item 20), secure the Cylinder (Item 5) to the Housing
(Item 2).
10. Alternately and evenly tighten the Cap Screws (Item
14) to 119 Ft. lbs. [161.34 Nm] torque.
FIGURE 1
2
1
4
5/6/7
14
20
TABLE 1
D ]
N O I T A C O L B U H E F D
L E D O M N O I T A C O L B U H
0 5 1 1 - E F D ] m m 5 2 1 . 1 1 1 [ " 5 7 3 . 4
0 5 6 1 - E F D ] m m 7 0 9 . 8 2 1 [ " 1 8 7 0 . 5
0 0 2 2 - E F D ] m m 4 2 3 . 0 6 1 [ " 2 1 3 . 6
0 0 5 2 - E F m m 0 5 7 . 8 5 1 [ " 0 5 2 . 6
Hub Location
FIGURE 2
INTRODUCTION
Nexen’s pneumatically actuated Dual Faced Elements (DFE)
and Quad Faced Elements (QFE) are used as a clutch or
brake. These elements are intended for horizontal mounting
only. The clutch is shaft mounted and the brake is either
shaft end mounted or through shaft mounted.
The DFE or QFE, and Air Union Bracket are sold separately.