Nexen DFE-2500 964009 - Manual (Page 16)

16 FORM NO. L-20021-E-0110
Refer to Figure 14 or 15.
1. Disconnect the air supply from the QFE.
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 QFE 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 first Disc Assembly (Item 4) out of the Housing
(Item 5).
7. Slide the Facing Plate (Item 24) out of the Housing
(Item 2).
8. Slide the second Disc Assembly (Item 4) out of the
Housing (Item 5).
9. Remove the old Machine Screws (Item 13) and the
old Friction Facings (Item 3) from the Housing (Item
2), Facing Plate (Item 24), and Pressure Plate (Item 7
on QFE 1150 and QFE 2500, or Item 6 on QFE 1650
and QFE 2200).
10. Using new Machine Screws (Item 13), install the new
Friction Facings (Item 3) onto the Housing (Item 2),
Facing Plate (Item 24), and Pressure Plate (Item 7 on
QFE 1150 and QFE 2500, or Item 6 on QFE 1650
and QFE 2200).
11. Tighten the new Machine Screws (Item 3) to 16 Ft.
Lbs. [21.59 Nm] torque.
12. Slide the second Disc Assembly (Item 4) removed back
into the Housing (Item 2).
13. Slide the Facing Plate (Item 24) back into the Housing
(Item 2).
14. Slide the first Disc Assembly (Item 4) removed back
into the Housing (Item 2).
15. Remove the old O-Ring Seals (Items 15 and 17) from
the Piston (Item 6 on QFE 1150 and 2500) and Pressure
Plate (Item 7 on QFE 1150 and 2500) or the Piston/
Pressure Plate (Item 6) on QFE 1650 and 2200).
16. 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).
17. Slide the Piston (Item 6) and Pressure Plate (Item 7) or
Piston/Pressure Plate (Item 6) back into the Cylinder
(Item 5).
18. 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.
19. Install the Lock Nuts (Item 19); then tighten the Lock
Nuts until a springs working height of 2.13'' [54.10
mm] is achieved.
20. Install the Lock Nuts (Item 19); then tighten the Lock
Nuts until a springs working height of 2.13'' [54.10
mm] is achieved.
21. Slide the Cylinder, Piston, and Pressure Plate back into
the Housing.
22. 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.
23. Alternately and evenly tighten the Cap Screws (Item
14) to 110 Ft. Lbs. [148.43 Nm] torque.
REPLACEMENT PARTS
The item or balloon number for all Nexen products is
used for part identification on all product parts lists,
product price lists, unit assembly drawings, bills of
materials, and instruction manuals. When ordering replacement parts, specify model
designation, item number, part description, and quantity.
Purchase replacement parts through your local Nexen
Distributor.
PARTS REPLACEMENT (continued)
CAUTION
Working with spring loaded or tension
loaded fasteners and devices can cause
injury. Wear safety glasses and take the
appropriate safety precautions.