2
FORM NO. L-20070-C-0501
INSTALLATION
1.
Place the Key (Item 5) in the shaft keyway and slide
the brake onto the shaft over the key.
NOTE: Position the brake so the port marked
WATER INLET is located at the bottom.
Water must enter at the bottom to make sure
the brake will be full of water at all times.
2.
Secure the brake to a solid support using the four
17/32" [1.3 cm] diameter mounting holes provided in
the Air Chamber (Item 3) flange.
NOTE: If the brake is not flange mounted, use a 7/
8'' [2.2 cm] diameter torque pin in the slot
provided in the Air Chamber flange to
absorb the braking torque. Torque pin
bracket assemblies (product no. 825500)
are available from Nexen or your local
Nexen distributor.
3.
Tighten the three Set Screws (Items 15 and 20)
located in the Friction Disc Hub to secure the brake
to the shaft.
AIR AND WATER CONNECTION
The brake’s air inlet is located in the Air Chamber (Item 3)
and is tapped 1/4 NPT. For quick response, connect a
short air line between the brake and the air controls. Air
controls that have at least 1/8" [0.3 cm] ports are recom-
mended and a quick exhaust valve should be used where
long air lines are required. Pneumatically actuated devices
require clean, pressure regulated air for maximum perfor-
mance and long life. It is recommended a filter, regulator,
and lubricator be used on the air line ahead of the air
controls.
The brake’s water inlet and outlet ports are located in the
Water Jacket Assembly (Item 2) and are tapped 1/8 NPT.
To ensure the brake will be full of water at all times, the
water should enter the brake at the bottom and discharge
at the top. Water entering the brake should be free of
contaminants. Use the two Hose Assemblies (Item 6)
supplied with the brake to connect the water lines and
controls to the inlet and outlet ports. The use of rigid
pipe or tubing will prevent proper actuation of the brake.
