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7
MAST ASSEMBLY
1. Support mast at both ends on saw horses or other
such devices. Ref: Illus. #1, Pg. 20.
2. Spreaders. In the rig kit you will find all the parts of
the spreader assembly.
3. The larger of the two pairs of aluminum rods (1-1), is
the spreader arm. Attach it to the aft tab of the spreader
root (1-2). Use a 3/16" x 11/16" clevis pin (1-3).
turnbuckle on the bolt, pass the bolt through the mast at
the compression sleeve which is located 1 foot above
the mast base(1-14). The shackled end of the MRCY
should be behind the mast.
4. Locate the slide (1-4) on the spreader arm so that the
large wing of the slide is closest to the mast, and facing
forward.
5. Line up the inboard hole on the slide with the
outboard hole on the spreader arm and insert the slide
adjustment pin 3/16" x 13/16" (1-5). The slide is now
positioned in the raked forward attitude.
6. Connect the smaller brace rod (1-6) between the
forward tab on the spreader root and the wing on the
slide, with the brace pin 3/16" x 9/16" (1-7).
7. Secure all the clevis pins with the cotter keys
provided.
8. Repeat steps 3-7 for the opposite side of the mast.
9.There will be two large cotter pins (1-8) left over, place
them to one side, they will be used later to retain the
diamond wires in the spreader arm tips.
10. Mast rotation control yoke (MRCY). In the rig kit you
will find the parts of the MRCY. You will also need the
diamond wires which can be identified by the
turnbuckles on one end.
11. IMPORTANT follow this sequence to assemble the
MRCY and diamond wires.
12. Hold the two arms of the
yoke (1-9) together at the
ends with the small holes.
Attach the small block (1-10)
and shackle (1-11) to this
end, see Figure 12. (There is
a short line packed with the
MRCY, set it to one side for
now.)
13. Pass the long bolt (1-12)
through the large hole in one arm of the MRCY (1-9).
Slide the toggle of diamond wire turnbuckle (1-13) over
the bolt and move it next to the MRCY arm.
14. With one arm of the MRCY and one diamond wire
turnbuckle on the bolt, pass the bolt through the mast at
the compression sleeve which is located 1 foot above
the mast base( 1-14). The shackled end of the MRCY
should be behind the mast.
15. Slide the turnbuckle toggle of the opposite diamond
wire over the exposed portion of the bolt. Install the
remaining arm of the MRCY on top of the turnbuckle
toggle.
16. Put the retaining nut (1-15) on the exposed threads
of the bolt and finger tighten only. It will be tightened
later. See figure 13.
17. Loosen the lock nuts at each end of the turnbuckle
body and expand the turnbuckle 2-1/2". Note that both
lock nuts spin in the same direction to unlock.
18. Attach the opposite end of the diamond wire to the
diamond wire tang (1-16) which is located 2 feet below
the mast tang (1-17). Install clevis pins (1-19) and cotter
pins (1-20).
Figure 13
Figure 12
NOTE: The style of rotator yoke shown in
Figure 12 is the older mast rotator style.
Current models do not have a pulley. See page
20 for details on the new style.