Nexen DFE-2500 964009 - Manual (Page 14)

14 FORM NO. L-20021-E-0110
Refer to Figure 12 or 13.
1. Disconnect the air supply from the DFE.
2. Remove the Lock Nuts (Item 19): then, remove the Cap
Screws (Item 11), Compression Springs (Item 10), and
Washers (Item 18).
3. Remove the Socket Head Cap Screws (Item 14) and
Lockwashers (Item 20).
4. Remove the Cylinder (Item 5).
NOTE: Applying low air pressure aids in the separation
of the Cylinder (Item 5) from the Piston (Item
6) and Pressure Plate (Item 7).
NOTE: On DFE Models 1650 and 2200 the Pressure
Plate and Piston are one unit (Item 6).
5. Slide the Piston (Item 6) and Pressure Plate (Item 7)
out of the Housing (Item 5).
6. Slide the Disc Assembly (Item 4) out of the Housing
(Item 5).
7. Remove the old Machine Screws (Item 13) and the
old Friction Facings (Item 3) from the Housing (Item
2), Disc Assembly (Item 4), and Pressure Plate (Item 7
on DFE 1150 and DFE 2500, or Item 6 on DFE 1650
and 2200).
8. Using new Machine Screws (Item 13), install the new
Friction Facings (Item 3) onto the Housing (Item 2),
Disc Assembly (Item 4), and Pressure Plate (Item 7
on DFE 1150 and DFE 2500, or Item 6 on DFE 1650
and DFE 2200).
9. Tighten the new Machine Screws (Item 3) to 16 Ft.
Lbs. [21.59 Nm] torque.
10. Slide the Disc Assembly (Item 4) back into the Housing
(Item 2).
11. Remove the old O-Ring Seals (Items 15 and 17) from the
Piston (Item 6 on DFE 1150 and 2500) and Pressure
Plate (Item 7 on DFE 1150 and 2500) or the Piston/
Pressure Plate (Item 6) on DFE 1650 and 2200).
12. Coat the new O-Ring Seals (Items 15 and 17) with
fresh O-Ring lubricant; then, install the new O-Ring
Seals into the Piston (Item 6) and Pressure Plate (Item
7) or Piston/Pressure Plate (Item 6).
13. Slide the Piston (Item 6) and Pressure Plate (Item 7) or
Piston/Pressure Plate (Item 6) back into the Cylinder
(Item 5).
14. Slide new Compression Springs (Item 10) and Washers
(Item 18) onto the Cap Screws (Item 11); then install
the Cap Screws, Compression Springs, and Washers
into the Cylinder, Piston, and Pressure Plate.
15. Install the Lock Nuts (Item 19); then tighten the Lock
Nuts until a spring working height of 2.13'' [54.10 mm]
is achieved.
16. Slide the Cylinder, Piston, and Pressure Plate back into
the Housing.
17. Apply a drop of Loctite 242 to the threads of the Cap
Screws (Item 14); then, using the Cap Screws and
Lockwashers (Item 20, secure the Cylinder, Piston,
and Pressure Plate to the Housing.
18. Alternately and evenly tighten the Cap Screws (Item
14) to 110 Ft. Lbs. [148.43 Nm] torque
CAUTION
Working with spring loaded or tension
loaded fasteners and devices can cause
injury. Wear safety glasses and take the
appropriate safety precautions.
PARTS REPLACEMENT (continued)