Nexen MBU-1125 937300 - Manual (Page 16)

16 FORM NO. L-21087-C-1010
MODULAR BRAKE UNIT (MBU)
Models 1125 and 1375
25
8 25
9 53 15 5
9 44 42
2
29
39
12 55
56 28
Refer to Figure 13.
1. Bend back the tabs on the old Keyed Washer (Item 55) and
remove the Lock Nut (Item 56) and Keyed Washer.
2. Fully support the Housing (Item 2) and press the Disc Journal
(Item 8) out of the Housing.
3. Alternately and evenly remove the four Socket Head
Shoulder Screws (Item 53) and Compression Springs (Item
15).
4. Slide the Piston (Item 5) out of the Housing (Item 2).
5. Remove the old O-ring Seals (Items 42 and 44) from the
Piston (Item 5).
6. Remove the six old Flat Head Screws (Item 25) securing
the old Friction Facing (Item 9) to the Piston (Item 5) and
remove the old Friction Facing (See Figure 18).
7. Using six new Flat Head Screws (Item 25), secure a new
Friction Facing (Item 9) to the Piston (Item 5).
8. Tighten the six flat Head Screws to 22 in-lb [2.50 Nm]
torque.
9. Remove the six old Flat Head Screws (Item 25) securing
the old Friction Facing (Item 9) to the Disc Journal (Item 8)
and remove the old Friction Facing.
10. Using six new Flat Head Screws (Item 25), secure a new
Friction Facing (Item 9) to the Disc Journal (Item 8).
11. Tighten the six Flat Head Screws to 22 in-lb [2.50 Nm]
torque.
12. Using a bearing puller, remove the old Ball Bearing (Item
28) from the Housing (Item 2).
13. Remove the Spacer (Item 12) and Retaining Ring (Item 39)
from the Housing (Item 2).
14. Press the old Ball Bearing (Item 29) out of the Housing (Item
2).
15. Clean the Bearing Bore of the Housing (Item 2) with fresh
solvent, making sure all old Loctite residue is removed.
16. Apply an adequate amount of Loctite ® 680 to evenly coat
the outer race of the new Ball Bearing (Item 29) and press
the new Ball Bearing into the Housing (Item 2).
17. Reinstall the Spacer (Item 12) and the Retaining Ring (Item
39).
18. Apply an adequate amount of Loctite ® 680 to evenly coat
the outer race of the new Ball Bearing (Item 28) and press
the new Ball Bearing into the Housing (Item 2).
19. Lubricate the new O-ring Seals (Items 42 and 44) and the
o-ring contact surfaces of the Housing (Item 2) and Piston
(Item 5) with a thin film of fresh o-ring lubricant.
20. Reinstall the new O-ring Seals (Items 42 and 44) onto the
Piston (Item 5) and slide the Piston into the Housing.
21. Slide a Compression Spring (Item 15) onto each of the four
Socket Head Shoulder Screws (Item 53) and secure the
Piston (Item 5) to the Housing (Item 2).
22. Alternately and evenly tighten the Socket Head Shoulder
Screws (Item 53) to 23 ft-lb [31 Nm] torque.
23. Supporting the inner race of the new Ball Bearing (Item 28
and press the Disc Journal (Item 8) into the Ball Bearings
(Items 28 and 29) and Housing (Item 2).
24. Slide a new Keyed Washer (Item 55) onto the Disc Journal
(Item 8) and reinstall the Lock Nut (Item 56).
25. Bend down the tabs of the new Keyed Washer (Item 55) to
lock the Lock Nut (Item 56).
FIGURE 13
PARTS REPLACEMENT
(continued...)
(continued...)
CAUTION
Special attention should be exercised
when working with retaining rings. Always
wear safety goggles when working with
spring or tension loaded fasteners or
devices.
CAUTION
The four Socket Head Shoulder Screws
(Item 53) are spring loaded. Always wear
safety goggles when working with spring
or tension loaded fasteners or devices.