Nexen QFB-2500 964086 - Manual (Page 11)

FORM NO. L-20117-F-0210 11
9. Remove the Pressure Plate (Item 7).
10. Remove and discard the old Compression Springs
(Item 9) from the Piston (Item 6).
11. Separate the Piston (Item 6) and Cylinder (Item 5).
12. Remove and discard the old O-ring Seals (Items 13
and 14).
13. Clean O-ring contact surfaces with fresh safety solvent.
14. Lubricate new O-ring Seals and O-ring contact surfaces
with a thin film of fresh O-ring lubricant.
15. Install new O-ring Seals (Items 13 and 14).
16. Slide the Piston (Item 6) back into the Cylinder (Item
5).
17. Install the new Compression Springs (Item 9).
18. Apply a drop of Loctite ® 242 locking compound to the
new Socket Head Cap Screws (Item 8).
19. Using the new Socket Head Cap Screws (Item 8) and
Lock Washers (Item 10), secure the Pressure Plate
(Item 7) to the Cylinder (Item 5).
20. Alternately and evenly install and tighten the new Socket
Head Cap Screws (Item 8) and Lock Washers (Item
10) to the recommended torque (See Table 6).
21. Apply a drop of Loctite ® 242 to the threads of the
Socket Head Cap Screws (Item 12).
NOTE: Be certain Shims are reinstalled in the proper
sequence. Install new Shims only when performing
Friction Facing wear adjustment (QFB only).
22. Reinstall the spring loaded actuator assembly on
Housing (Item 2) with Shims (Items 16, 17, and 18),
new Socket Head Cap Screws (Item 12), and new
Lock Washers (Item 15).
23. Alternately and evenly tighten the new Socket Head
Cap Screws (Item 12) to the recommended torque
(See Table 6).
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.