Binding Posts and Communications:
Old Style Installation:
a. Remove the speaker by first unscrewing the lock screw from the speaker ring. Pull the speaker
and cup from the ring. Detach the wires from the binding posts. Remove the post retaining nuts and
unscrew the binding posts. Remove the bushings from the block.
New Style Installation:
a.Remove the speaker from the side cup. It is held in place with two sided foam tape. Detach the wires
from the binding posts. Remove the post retaining nuts and unscrew the binding posts. Remove the
bushings from the block.
Headpiece Assembly:
a. Remove retaining nut in the center top of the helmet.
b. The side and top pads may be adhered to the shell. Slide a screwdriver or putty knife along the
shell and gently pry the pads loose. You may have to pry in several locations to keep from tearing
the pads.
c. The liner is easiest to remove by pulling the side by the binding post block in and up to clear the
block then hooking the assembly around from under the air train assembly.
Air Train Assembly:
a. Remove the Non-Return Valve/s from the helmet.
b. Remove the Air Control Valve Handle.
c. Loosen the valve-retaining nut.
d. Loosen the compression nuts on the copper tube and remove the tube.
e. Remove the valve-retaining stem adapter, valve retaining nut, brass and lead washers, and then
the valve. Use caution when removing the valve so as not to lose the compression ring off of the
valve stem. A piece of tape on the valve stem before the valve is removed will prevent loss.
f. Unscrew the Air Diffuser from the valve body.
g. The inside elbow can be removed if needed. It is secured using 10-minute two-part epoxy. Use
two adjustable wrenches, one on the flats of the elbow and one to turn the first wrench. Use
extreme caution to avoid damaging the threads or bending the elbow.
Video Block Assembly:
a. Unscrew the two 3/8” bolts from their blocks.
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Summary of Contents for 61000
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