3
FORM NO. L-20016-U-0305
SHEAVE MOUNT CLUTCH-BRAKE
1.
Insert the first Key (Item 30) into the shaft (See Figure 4).
2.
Slide the Clutch-Brake onto shaft and key; then, insert the
second Key (Item 30) (See Figure 4).
3.
Tighten Set Screws (Items 27 and 28) to the recommended
torque (See Table 4 and Figure 4).
NOTE
If a bushing for smaller diameter shafts is required, use a
bushing on both ends of the Clutch-Brake.
4.
Align air inlet ports to a six o’clock down position to allow
condensation to drain out of exhaust port.
5.
Fasten one of the ears of the Clutch-Brake to a fixed member
of the machine (See Figure 4).
NOTE
The Piston Air Chamber (Item 7) floats laterally
approximately 1/16 inch [1.59 mm] during operation.
Make sure securing pin allows 1/16 inch to 1/8 inch [1.59
mm to 3.18 mm] movement of Piston Air Chamber.
DESCRIPTION
FWCB
LWCB
MWCB
HWCB
35 In. Lbs.
80 In. Lbs.
80 In. Lbs.
23 Ft. Lbs.
Set Screw (Item 27)
[3.9 N•m]
[8.9 N•m]
[8.9 N•m]
[31.2 N•m]
20 In. Lbs.
20 In. Lbs.
80 In. Lbs.
— —
Set Screw (Item 28)
[2.2 N•m]
[2.2 N•m]
[8.9 N•m]
— —
FIGURE 4
Shaft
Key
(Item 30)
Set Screw
(Item 28
or 48)
Set Screw
(Item 27)
Key
(Item 30)
Clutch-Brake
TABLE 4
RECOMMENDED TIGHTENING TORQUES
AIR CONNECTIONS
NOTE
For quick response, Nexen recommends a quick exhaust valve and short air lines between the Control Valves and the clutch/
brake. Align the inlet ports to a down position to allow condensation to drain out of the air chambers.
4-WAY CONTROL VALVE
1.
If the brake is to be set when the solenoid is de-energized,
connect the port marked
2
to the brake and the port marked
4
to the clutch (See Figure 5).
2.
Connect the air supply line to the inlet port marked
1
(See
Figure 5).
FIGURE 5
®
DIST. AUTORIZADO
MEX (55) 53 63 23 31
QRO (442) 1 95 72 60
MTY (81) 83 54 10 18
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