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10

FORM NO. L-20117-G-0914

  PARTS REPLACEMENT

Refer to Figures 9 & 10. 

NOTE:   Friction Facings must be replaced when the gap 

between the Cylinder and Piston is approximately 
1/32"  after  the  Friction  Facing  wear  adjustment 
has been made.

1.   Alternately and evenly remove and discard the old Socket 

Head Cap Screws (Item 12) and Lock Washers (Item 
15).

2.   Remove the Shims (Items 16,17, and 18), keeping them 

in proper sequence  for reassembly.

3.   Remove spring loaded actuator assembly (Items 5-10, 

13, and 14).

 

NOTE:   DFB  Series  Brakes  contain  one  Drive  Disc 

Assembly (Item 4) and one Friction Plate (Item 
19).  QFB Series Brakes contain two Drive Disc 
Assemblies (Item 4) and two Friction Plates 
(Item 19).

4.   Remove Friction Plate (Item 19) and Drive Disc Assembly 

(Item 4).

 

NOTE:   The  Flat  Head  Screws  are  assembled  with 

a micro-encapsulated two part epoxy thread 
locking  system.    If  removal  is  difficult,  strike 
the end of the screwdriver with a hammer to 
break the crystalline structure or the compound 
before  attempting  to  remove  the  Flat  Head 
Screws.

5.   Remove Flat Head Screws (Item 11) securing Friction 

Facings (Item 3).

6.   Install the new Flat Head Screws (Item 11) and new 

Friction Facing (Item 3) into Housing (Item 2).  Tighten 
Flat Head Screws to recommended torque (See Table 
6).

7.   Alternately and evenly loosen the old Socket Head Cap 

Screws (Item 8) to relieve spring tension on Pressure 
Plate (Item 7).

8.   Remove and discard the old Socket Head Cap Screws 

(Item 8) and  Lock Washers (Item 10).

TABLE  6

  FIGURE 10

18

17

16

5

13

12

15

6

9

14

8

10

7

19

4

3

  FIGURE  9

17

18

12

16 6 15

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1

CAUTION

Working  with  spring  loaded  or  tension 
loaded  fasteners  and  devices  can  cause 
injury.    Wear  safety  glasses  and  take  the 
appropriate safety precautions.  

Summary of Contents for Air Champ DFB-1150

Page 1: ......

Page 2: ......

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Page 9: ...FORM NO L 20117 G 0914 1 Dual and Quad Faced Brakes DFB and QFB Models 1150 1650 2200 and 2500...

Page 10: ...ce until the machinery into which it is to be incorporated has been declared in conformity with the applicable provisions of the Directive Read this manual carefully before installation and operation...

Page 11: ...neral Specifications 4 General Safety Precautions 4 Installation 5 Lubrication 7 Air Connections 7 Operation 8 Troubleshooting 9 Friction Facing Wear Adjustment 9 Parts Replacement 10 Replacement Part...

Page 12: ...0 in lbs Actuation Pressure 1 5 5 bar 14 5 80 psi Service Temperature 4 5 104 C 40 220 F Approximate Weight Up to 385 kg 850 lbs CAUTION Use appropriate guarding for moving components Failure to guard...

Page 13: ...embly 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 pilo...

Page 14: ...quired to achieve the 1 456 dimension See Figures 5 and 6 for proper Shim placement 11 Apply a drop of Loctite 242 to the threads of the Socket Head Cap Screws Item 12 See Figure 6 12 Install Lock Was...

Page 15: ...are not using a Nexen lubricator calibration must follow the manufacturer s suggested procedure 4 Close the air line to the unit when a drop of oil forms in the Lubricator Sight Gage 5 Connect the air...

Page 16: ...both ports is mandatory to ensure proper actuation of the brake See Figure 7 WARNING Never exceed maximum operating speeds listed for your product See Table 4 OPERATION TABLE 4 Size Max RPM DFB QFB 11...

Page 17: ...t c i r F e c a l p e R y l n o B F Q t n e m t s u j d a r a e w g n i c a F n o i t c i r F t c e r r o c n I t n e m t s u j d a r a e w g n i c a F n o i t c i r F m r o f r e P FRICTION FACING WE...

Page 18: ...ing to remove the Flat Head Screws 5 Remove Flat Head Screws Item 11 securing Friction Facings Item 3 6 Install the new Flat Head Screws Item 11 and new Friction Facing Item 3 into Housing Item 2 Tigh...

Page 19: ...ded 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 perf...

Page 20: ...NO L 20117 G 0914 REPLACEMENT PARTS continued FIGURE 12 QFB EXPLODED VIEW 11 8 10 7 9 18 17 16 15 12 2 3 1 4 3 19 4 3 19 6 13 14 5 2 3 1 4 19 7 6 14 13 3 11 8 10 9 18 17 16 15 12 5 FIGURE 11 DFB EXPLO...

Page 21: ...1 8 8 0 1 0 1 5 1 5 1 0 1 r e h s a W k c o L 6 6 6 6 0 1 2 2 0 1 0 1 1 1 w e r c S d a e H t a l F 4 2 8 4 4 2 8 4 4 2 8 4 4 2 8 4 2 1 w e r c S p a C d a e H t e k c o S 6 6 2 1 2 1 2 1 2 1 2 1 2 1...

Page 22: ...TURE WHATSOEVER WHETHER ARISING OUT OF BREACH OF WARRANTY OR OTHER BREACH OF CONTRACT NEGLIGENCE OR OTHER TORT OR OTHERWISE EVEN IF NEXEN SHALL HAVE BEEN ADVISED OF THE POSSIBILITY OR LIKELIHOOD OF SU...

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