Nexen EMB 130-24 964911 - Manual (Page 11)

11 FORM NO. L-21081-L-0813
BRAKE ASSEMBLY (continued)
13. Clean the friction surface of the Air Chamber (Item 6)
and Output Shaft (Item 1) with solvent.
14. Reinstall Dowel Pin (Item 21) by pressing into
Air Chamber (Item 6) until flush with the outside
surface.
15. Position Friction Facing on top of the piston with
the narrow end of the taper pointing down and the
anti-rotation facing slot aligned with the Dowel Pin
(Item 21). Use care to ensure that the Friction Facing
is concentric to the piston, as this will aid in the
installation of the output shaft in step 16.
16. Support the inner race of the new Ball Bearing (Item
2) and press the Output Shaft (Item 1) into the new
Bearing (Item 2) and Air Chamber (Item 6).
17. Replace the Wave Spring (Item 9) and Input Flange
(Item 10).
NOTE: On the Size 2 Spring, one end will be fused. Be
sure that the fused end is down and makes contact with
the facing (Item 8).
18. Apply a drop of Loctite® 242 to the threads of the
Socket Head Cap Screws (Item 11).
19. Reinstall and tighten the four Socket Head Cap
Screws (Item 11), securing the Air Chamber (Item 6)
to the Input Flange (Item 10). Alternate as you tighten
the four Socket Head Cap Screws so that the Input
Flange remains evenly parallel to the Air Chamber.
Refer to Table 5 for the recommended assembly torque
values.
TROUBLESHOOTING
TABLE 5
Brake
Model
Socket Head
Cap Screw
(Item 11)
Recommended
Assembly Torque
Size 2 M4
4.2-5.4 Nm
[37-48 in-lb]
Size 3 M5
7.0-9.2 Nm
[62-81 in-lb]
Size 4
EMB 110-14
M6
9.2-11.9 Nm
[81-105 in-lb]
Size 5 M8
26.2-34.0 Nm
[232-301 in-lb]
EMB 130-19
EMB 130-24
M8
26.2-34.0 Nm
[232-301 in-lb]
EMB 625
EMB 875
M8
26.2-34.0 Nm
[232-301 in-lb]
Problem Probable Cause Solution
Failure to engage (brake). Weak or broken spring. Replace broken spring.
Failure to disengage (1).
Control valve malfunction - air not
getting to the brake.
Check for low air pressure or replace
the control valve.
Note: Pressure needed to disengage
is shown in the specifications table,
page 4.
Failure to disengage (2).
Air is leaking around the O-ring
seals.
Replace the O-rings.
Loss of torque. Friction Facing is worn or dirty. Replace the Friction Facing.