Boom Insert
( 171541)
Assembly of the Boom
Slide the boom insert into boom ends, as shown
in Figure 1. Select the boom-to-mast bracket and
clamp parts. Loosely assemble them on the
boom ends.
Secure the boom ends and brackets together with
four (4) 1/4"-20 x 3/4" bolts, lockwashers and
nuts, and two (2) 5/16"-18 x 2 3/4" bolts, lock-
Tighten these six bolts securely. The casting-to-
boom bracket may deform slightly when the
four 1/4" bolts are tightened. This is normal.
Assemble the two cast aluminum brackets (1) on
your temporary mast at about 4 feet (1.2 m)
above ground. An eight foot length of 2" ABS or
PVC plastic drain pipe makes an inexpensive
temporary mast. Secure the two brackets
together using two (2) 5/16"-18 x 3" bolts,
lockwashers and nuts. Tighten these
two bolts evenly until the brackets are snug.
Note:
If you use a galvanized 1-1/2
schedule 40 or 80 pipe as a mast, it
has an O.D. of 1.9”. You will need
to put two split lockwashers under
the 5/16 nuts on the four long bolts.
MAST
( Supplied by customer )
( 1.9” to 2.5” diameter )
5/16 x 5
102734
5/16x2-3/4
172732
1/4-20x3/4
172735
5/16x3
5/16x4
170424
175661
170410
Secure using the 1/4-20 x 2-1/2 bolts
1/4-20 lock washer
1/4-20 nuts
170424
figure 1
1 5
6 1
7
6
1
1
7566
washers and nuts.
170424
170424
175661
170410
2”x 57
2”x 57
2”x 75
2”x 75
2”x 81 heavy
wall
2”x 81 heavy
wall
Assemble the boom as shown below. Use the
1/4-20 x 2-1/2 bolts, lock washers and nuts.
See figure 1
Boom is symmetrical (same on both sides)
