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Page 34
Install the element return mounting plate (PN 10
-
1608
-
01). Use four of the
1
-
3/4”
aluminum saddles,
5/16”
x
3
-
1/2”
hex head bolts and
5/16”
Nylock nuts as shown in
figure 3.30
. Tighten the nuts, but
leave loose enough to adjust for the center
-
to
-
center measurement. Again using four of the 1
-
3/4 alu-
minum saddles,
5/16”
x
3
-
1/2”
hex head bolts, and Nylock nuts, loosely install the return tube saddles
as shown in
figure 3.31
.
Insert the element return tube (PN 10
-
1015
-
11) as shown in
figure 3.32
. Be sure that the return tube
is protruding out approximately 2.5 inches away from the aluminum saddle edge on each side, as
shown in
figure 3.34
. Tighten the saddles to a maximum of 7 ft lb (9.5Nm). This is very important.
The aluminum saddles can crush the fiberglass tubes if the saddles are too tight.
Measure 30 inches from the center
-
point of the Director EHU to the center
-
point of the element return
tube as shown in
figure 3.33
. Level the return bracket assembly as shown in
figure 3.34
and tighten
the saddle bolts firmly. Do not forget to use anti
-
seize on all stainless steel fasteners, and also remem-
ber to install a set screw into each saddle pair (one set screw per saddle pair).
NOTE:
If you purchased the optional boom truss kit, be sure to mount the truss attachment plate (PN 10
-
1607
-
01) on the Director return tube as shown in
figure 3.35
. The attachment plate is inserted between the
top of the hex head bolts and the return tube mounting plate. If you did not purchase the boom truss op-
tion, disregard this note.
Figure 3.36
shows the completed director EHU and return bracket.
CHAPTER THREE
Section 3.3
MOUNTING THE EHU
’
S ON THE BOOM (continued)
RETURN TUBE MOUNTING—DIRECTOR EHU
FIG. 3.30
FIG. 3.36
FIG. 3.31
FIG. 3.32
FIG. 3.33
FIG. 3.34
FIG. 3.35