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Now it is time to make the appropriate mounting
holes in the shroud for both the Gamma 28 blowers and to facilitate attaching the shroud
itself to the FDP-32 heatsink. I used a punch tool but the holes can be made just as
easily with a conventional hand drill or shop drill press. |
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There are two 5/64" holes required on this
side of the shroud to allow it to attach to the FDP-32 heatsink. In this photo you
can see the two 5/64" holes drilled into the heatsink itself. The location of
these holes should be determined by actually fitting the shroud onto the heatsink them
marking the locations. I made the holes in the shroud first then transferred the
location to the heatsink and drilled them with my drill press to a depth of approx
1/2". Do not worry about the FDP-32's original fan mounting holes, they will no
longer be required. Now is also the time to mark the location and
cut the clearance for the heatsink clip. |
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A single 5/64" hole is required on the
opposite side of the shroud as shown in this photo. Again a corresponding 5/64"
hole was drilled into base of the FDP-32 to a depth of 1/2". |
 
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Now using the #4 x 3/8" sheet metal screws
attach the shroud to the heatsink on both sides. Be sure to put the heatsink
mounting clip in place before you attach the shroud to the heatsink.
Another look at the shroud attached to the heatsink. |
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It is now time to assemble the dual Gamma 28
blower setup. In this photo you can see one of the 3" machine bolts (2
required) and a 3/8" long piece of plastic tubing (2 required) which will be used as
a spacer. Also note the 4 pin power connector has already been soldered into place.
Remember that the blowers need 12 volts from your system's power supply so be sure
to attach the connector accordingly. |
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Here is the dual blower assembly with the
3" machine bolts and plastic spacers in place. Also seen it this photo are the
two pieces of 3M double-sided foam tape (red plastic covering) in place one attached to
each Gamma 28. Do not peel the second side plastic covering off the double-sided
tape yet. |
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Here is the second 3" machine bolt and
plastic spacer in place. |
 
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With the blowers assembled together trial fit
them snugly into the shroud. Carefully mark the location of the necessary 3/16"
holes which will need to be made into each side of the shroud at the top blower mounting
hole location then drill or punch the holes. |
