Nexen BD 933617 - Manual (Page 5)

5
FORM NO. L-20271-F-0609
9. Press in the Pivot Pins (Item 7) (See Figure 2).
10. Reinsert the Pivot Pin Retaining Plate (Item 6) (See Figure
2).
11. Reinstall the four Cap Screws (Item 24) and tighten to
40‑50 In. Lbs. [4.5‑5.6 N•m] torque.
NOTE
When reinstalling the Shoe (Item 3), first place the
Belleville Disc Springs (Item 29) into the recesses
provided in the Brake Arm (Item 2). The Belleville Disc
Springs should be inserted with their concave side
toward the Brake Arm.
12. Reinstall the Shoes (Item 3) and Belleville Disc Springs
(Item 29) (See Figure 2).
13. Reinsert the Detent Pins (Item 16) to secure the Shoes
(Item 3) and Belleville Disc Springs (Item 29) (See
Figure 2).
14. Loosen the Nut to manually reset the brake.
15. Remove the Threaded Rod, Nut, and Washer.
16. Screw the Vent (Item 17) into the back of the Actuator
until hand tight and continue to tighten one and one-half
turns.
MAIN FRAME
NOTE
Set Screws (Item 27) and Hex. Nuts (Item 28) are
provided to hold Brake Arms (Item 2) in place when the
BD Caliper Brake is used on vertical shaft installations
(See Figure 3).
1. Locate the BD Caliper Brake in the desired position in
relation to the disc.
NOTE
This BD Caliper Brake is spring engaged and
hydraulically disengaged. To release the spring
pressure, remove the Vent, then lubricate and insert a
Grade 5, 3/8-16 x 9'' Threaded Rod into the back of the
Actuator; then, using a Flat Washer and Nut, tighten
the Nut to release the spring pressure (See Figure 4).
A Manual Release Kit (Product No. 933596) containing
these items is available from Nexen.
2. Align the customer supplied support with the Main Frame
(Item 1) mounting holes.
NOTE
The support must be capable of sustaining loads
produced during braking.
If shims are used under the Main Frame (Item 1) mounting
pads, care must be taken to prevent warping of the Main
Frame when tightening the customer supplied 5/8''-11
cap screws (See Figure 3).
WARNING
The customer supplied 5/8''-11 cap screws must sustain
the loads produced by the braking preload produced
by mounting torque. The torque rating specified above
allows a significant load safety factor. DO NOT OVER
TORQUE CAP SCREWS.
3. Tighten the customer supplied 5/8''-11 cap screws to
150 Ft. Lbs. [203.4 N•m] torque.
4. Remove the Threaded Rod, Nut, and Washer.
5. Screw the Vent (Item 17) into the back of the Actuator
until hand tight and continue to tighten one and one-half
turns.
Actuator
Flat Washer
Nut
Grade 5
3/8-16 x 9''
Threaded Rod
FIGURE 3
2
27
1
Customer supplied
5/8''-11 cap screws
and lock washers
28
FIGURE 4
NOTE
The Vent in the Rear Cylinder prevents debris from
entering the Belleville Spring stack and relieves any
pressure built up by the reciprocating action of the
Piston.