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INNOVATOR DOOR MAINTENANCE
As part of an ongoing maintenance program for Innovator Doors,
Hussmann recommends that the items below be checked annually.
a) Proper door closing torque.
b) Gasket performance (check for tearing and proper sealing).
c) Check the top hinge pin to ensure the pin is properly seated and
not bent.
d) Check the bottom hinge plate for excessive wear (worn cam
teeth).
e) Proper operation of hold open brackets.
1. Check the doors for proper closing torque:
Torque adjustment, if needed, should be performed "one click" at a
time. A "zero" torque door should not require more than 4 clicks. If the
torque cam and hinge socket are severely rusted, both components
should be replaced.
A severely rusted cam / socket assembly will not hold torque. Rust on
the cam socket assembly is usually caused by one of the following:
• High humidity conditions > ASHRAE Type I
• Cycling of the frame heaters
Note 1: A rusted torque cam / socket assembly can cause excessive
wear on the torque rod's spacer and sleeve bearing. The result is a
door that can "seat" farther down the rod assembly to the point that it
causes binding at the hold open bracket.
It can also cause the top hinge pin's sleeve bearing to deform. If the
door is seated too far down the torque rod assembly, it most likely
damaged the top hinge pin sleeve bearing. If the pin is not bent,
replacing the pin's nylon sleeve bearing will be sufficient. Although the
torque rod assembly's sleeve bearing and spacer are replaceable, we
recommend that a severely rusted torque rod assembly be replaced.
HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3034041_ J
2. Inspect door gaskets:
• Check for tearing gaskets
• Make sure the gasket's dart is properly seated into the
door's gasket groove.
3. Inspect the top hinge assembly for excessive movement at the top
hinge socket.
• By design, the door will have a small, but discernible
amount of movement at the top hinge pin / hinge plate
socket joint. If excessive movement is detected, the hinge
pin assembly should be inspected to ensure that the hinge
pin is not bent (refer to note #1).
4. Inspect hold open bracket:
• Open the door to the "hold open" engagement position.
The "hold open" bracket should retain the door.
• If the bracket fails to retain the door, replace the bracket
and the shoulder screw.
5. If a door passes the three "open / close" tests, and there is no
excessive movement at the top hinge pin, then it is highly unlikely
that any components require replacement.
3-5
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