Owner's manual

ITEM DESCRIPTION
1 Lock Lever
2 Brake Shoe
3 Spacer Block
4 Anvil Screw
5 Hex Head Screw
(3%16 x l-112)
6 Lock Washer
(3/8 Int Tooth)
I Lock Fulcrum
8
Pivot Pin
PART NUMBER
142007
141889
152179
152296
7OlOODXO7L
705208PlOQ
152177
120175-l
Figure 8-2. Air Lock Brake Exploded View
3. Turn the brake anvil screw (4) in until the
anvil brake shoe (2) just clears face of
sector.
2.
Remove hex head screws (5, Figure 8-2) and
lock washers (6).
4. Turn air lock release handle fully
counterclockwise.
5. Restore air and electrical power to
positioner.
3. Set spacer blocks (3) aside and move
assembled lock lever (1) back, clear of
sector.
4.
Using a punch, tap brake shoes (2) free from
lock lever (1).
c. Air Lock Brake Shoe Replacement.
WARNING
Before performing any maintenance or
repair action on power positioner, shut off
supply air and signal air, and disconnect
any electrical supply or electronic signals to
power positioner. Isolate power positioner
from all systems connected to power
positioner. Severe injury or death may
result from large torque power positioner is
capable of producing, or from electrical
shock.
5. Remove anvil screw (4) and brake shoe (2).
Pull brake shoe out of anvil screw.
6. Install new brake shoe in anvil screw and
replace anvil screw in air lock frame.
7. Install new brake shoe (2) in lock lever (1).
8.
Position lock lever against frame with spacer
blocks (3) and secure in place with lock
washers (6) and hex head SCI~WS (5).
9. Adjust air lock brake in accordance with
paragraph 8-2.a. above.
1. Remove power positioner from service, close 10. Restore air and electrical power to
supply air shut off valve, and isolate positioner.
electrical power from power positioner.