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Page 25
The Driven element is assembled in precisely the same way as the Director. We will refer to some of the
pictures for the Driven element assembly.
Refer to the center
-
to
-
center measurements in
Figure 1.00 in Section 1.0
when installing each of the EHUs
and mounting plates to the boom. The EHU should already be wired before placing it on the aluminum
mounting plate.
Position the aluminum mounting plate (PN 10
-
1015
-
11) and align the
1.75”
aluminum saddle halves (PN 10
-
1601
-
03) flush with the tube end as shown in
Figure 1.00
. Insert the
5/16”
x
3
-
1/2”
hex head bolts (PN 60
-
0065) and thread on the
5/16”
Nylock nuts (PN 60
-
0046). Insert a set screw on the exposed side of each
aluminum saddle. Tighten the nuts, but allow the mounting plate to be loose enough for adjusting the center
-
to
-
center measurement.
Be sure to use anti
-
seize on all stainless steel fasteners.
Place the EHU gasket (PN 10
-
1502
-
01) onto the mounting plate as shown in
Figure 1.22
. Remove all chads
from the holes for the 10
-
32 mounting screws. Align the gasket with the holes on the mounting plate. Place
the EHU (PN 70
-
3403
-
01) onto the mounting plate and attach it using the #10 x
3/4”
machine screws (PN 60
-
0017), #10 flat washers (PN 60
-
0018) and #10 Nylock nuts (PN 60
-
0019) as shown in
Figure 1.23
. Be sure
that the flat washer is between the machine screw head and the EHU housing as shown in
Figure 1.24
.
Tighten the Nylock nuts enough to compress the gasket material but do not over tighten or you can crack the
plastic EHU housing. It is best to tighten the nuts twice, with the final tightening being the most aggressive.
Let the EHU sit for a few moments in between tightening.
Verify that the center
-
to
-
center length from the Director EHU to the Driven EHU is 41.5 inches.
Level the EHU as shown in
Figure 1.37,
tighten the aluminum saddles firmly, and then tighten the set screws
(PN 60
-
0112).
Figure 1.50
shows the boom with two EHUs
SECTION 1.5
SECURE DRIVEN MOUNTING PLATE AND EHU TO BOOM
PREPARING THE BOOM ASSEMBLY
Driven EHU Mounting
FIG 1.50