Sound Enclosure Lower Cavity Reversal
In the following procedure, certain steps require two people.
Required tools: 7/16” box or socket wrench
11/32” nut driver or socket wrench
(2) Needle-nose vice grips
1. Place a packing blanket or cardboard on the floor to prevent scratching the
exterior of the enclosure.
2. Tilt the enclosure over on its flat side. The intake and exhaust ports should not
be on the floor.
3. Reaching in through the projection port, attach and lock a needle nose vice grips
to the (2) spring ends. Remove the 7/16” nut and washer. Carefully lift the
spring hook off the bolt and let it slowly retract. Leave the vice grips on the
spring end to prevent it from retracting into the spring housing. Do this for both
left and right springs.
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Sound Enclosure Lower Cavity Reversal
4. This step requires two people. One holds the upper cavity still while the second
person holds the lower cavity. Pull the lower cavity from the upper for interior
access.
5. On the lower cavity, loosen and remove the (4) 11/32” tri-lock nuts and washers.
Do this for both cavity guide assemblies.
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Sound Enclosure Lower Cavity Reversal
6. Carefully lift the lower guide assembly off the threaded studs. Do not twist the
guides.
7. Rotate the lower cavity 180° and reposition the guide assemblies on the threaded
studs. Be careful not to flex the guide assemblies.
8. Replace and tighten the 11/32” washers and nuts of both guide assemblies.
9. Grasp the vice grips holding the spring and pull the spring, extending it until you
can hook the spring end over the threaded stud. Replace and tighten the 7/16”
washers and nuts of both assemblies.
Alternative to cavity reversal for opposite air flow (tools required: 7/16” wrench,
Phillips-head screwdriver, 11/32” open-end wrench). Remove fan assemblies, remove
fans and reinstall in reverse. On the side of the fan you will notice a directional arrow
for air flow.
Removal Nuts
Fan Bolts
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