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Installation, Coupling mount clutch-brake – Nexen MWCB 830812 User Manual

Page 6

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6

FORM NO. L-20016-X-1209

COUPLING MOUNT CLUTCH-BRAKE

Refer to Figure 2.

1. Determine the parallel misalignment of shafts to be coupled

by placing a straight edge across the shafts and measuring
the maximum offset at various points around the periphery
of the shafts. Make the necessary corrections to keep the
shafts within parallel misalignment limits of the clutch coupling
(See Table 2).

NOTE

Before installation, the driving shaft can be fixed but the

driven shaft must be allowed to “float”.

Align the air inlet ports to the six o’clock down position to

allow condensation to drain out of the exhaust port.

2. Insert the first Key (Item 30) into driven shaft.

3. Slide Clutch-Brake Assembly onto the driven shaft.

4. Insert second Key (Item 30).

5. Install and tighten Set Screws (Items 27 and 28) to the

recommended torque (See Table 3).

6. Attach the Coupling Adapter Plate (Item 24) to the Clutch-

Brake pilot using Cap Screws (Item 33) and Lock Washers
(Item 34); then, tighten the Cap Screws to the recommended
torque (See Table 3).

7. Place the Coupling’s Flexible Disc (Item 25) over the pins in

the Coupling Adapter Plate (Item 24).

8. Insert the customer supplied Dodge™ Taper-Lock Bushing

into the Coupling Hub (Item 26).

9. Align the holes (not the threads) and slide the Dodge

TM

Taper-

Lock Bushing Assembly onto the driving shaft until it is flush
with the shaft.

10. Thread the screws into threaded holes in the Dodge

TM

Taper-

Lock Bushing and Coupling Hub (Item 26); then, alternately
and evenly tighten the screws to the bushing manufacturer's
specifications.

11. Align the pins in the Coupling Hub (Item 26) with the holes

in the Flexible Disc (Item 25).

12. Push the entire assembly together. Automatic spacing is

accomplished by spacers molded into the Flexible Disc.

13. Fasten one of the ears of the Clutch-Brake to a fixed member

of the machine.

NOTE

The Piston Air Chamber (Item 7) floats laterally approxi-

mately 1/16 inch [1.59 mm] during operation. Make sure

the securing pin allows 1/16 inch to 1/8 inch [1.59 mm to

3.18 mm] movement.

TABLE 2

TABLE 3

RECOMMENDED TIGHTENING TORQUES

FIGURE 2

Driving

Shaft

Dodge

TM

Taper-Lock

Bushing

Driven

Shaft

Clutch-Brake

30

30

27

28

26

25

34

33

24

Model

Dodge™

Taper-Lock

Poly-Disk

Coupling

Size

Measured Variation

@ Points 180

o

Apart

Axial Float

(Minimum

Value From

Recommended

Initial Spacing)

Parallel

Maximum

Angular

Maximum

FWCB

2-5/8 In.

[66.75mm]

0.015 In.

[0.381 mm]

0.040 In.

[1.016 mm]

+1/8 In.

[+1.375 mm]

LWCB

4 In.

[101.6 mm]

0.015 In.

[0.381 mm]

0.064 In.

[1.625 mm]

+1/8 In.

[+1.375 mm]

MWCB

7 In.

[177.8 mm]

0.015 In.

[0.381 mm]

0.112 In.

[2.845 mm]

+1/8 In.

[+1.375 mm]

HWCB

8 In.

[203.2 mm]

0.015 In.

[0.381 mm]

0.128 In.

[3.251 mm]

+1/8 In.

[+1.375 mm]

Description

FWCB

LWCB

MWCB

HWCB

Set Screw

(Item 27)

35 In. Lbs.

[3.9 N.m]

80 In. Lbs.

[8.9 N.m]

80 In. Lbs.

[8.9 N.m]

23 Ft. Lbs.

[3.9 N.m]

Set Screw

(Item 28)

20 In. Lbs.

[2.2 N.m]

20 In. Lbs.

[2.2 N.m]

80 In. Lbs.

[8.9 N.m]

— —

Cap Screw

(Item 33)

21 Ft. Lbs.
[28.5 N.m]

21 Ft. Lbs.
[28.5 N.m]

23 Ft. Lbs.
[31.2 N.m]

78 Ft. Lbs.

[105.8 N.m]

INSTALLATION

(continued)