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Page 40
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 3.70
. 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 3.71
.
Insert the element return tube (PN 10
-
1015
-
11) as shown in
figure 3.72
. 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
fig-
ure 3.73
. 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 reflector EHU to the center
-
point of the return tube as shown
in
figure 3.74
. The center
-
point of the return tube should also be approximately 5 inches away from the
right edge of the boom as shown in
figure 3.75
. Remember, the center
-
to
-
center measurements always get
the priority.
Level the return bracket assembly as shown in
figure 3.76
and tighten the saddle bolts firmly. Do not forget
to use anti
-
seize on all stainless steel fasteners, and also remember to install a set screw into each saddle
pair (one set screw per saddle pair).
CHAPTER THREE
SECTION 3.7
MOUNTING THE EHU
’
S ON THE BOOM (continued)
RETURN TUBE MOUNTING—REFLECTOR EHU
FIG. 3.71
FIG. 3.70
FIG. 3.72
FIG. 3.74
FIG. 3.76
FIG. 3.75
FIG. 3.73