SECTION 5 - MAST COMPONENTS
5-24
31215825
Mast Section 4 - Assembly
NOTE:
When sliding mast sections together, be careful not to
scratch or score the anodized finish in the slide pad chan
-
nels.
39.
Carefully slide mast section-4 into section-3 until ends
are even.
40.
Insert slide pads into the top end mast rails between
section-2 and -3,
(one on each side of the mast)
, with bev
-
eled surface facing inward towards section-3.
NOTE:
Before fastening and shimming the slide pad on the top
left side of the mast, install a sequence cable bracket
against the mast under the flatwasher.
41.
Thread slide pad attaching bolts, two (2) 1/4”-20UNC x
3/8” long hex head bolts, place a flat washer under head
of each bolt, through holes in outside rail, on top of mast
section-2 and into the slide pad inserts. Thread in
enough to hold pad in place.
42.
Shim per instructions in step 7, Mast Section 2 - Assem
-
bly.
43.
Insert slide pads into the bottom end mast rails between
section-2 and -3,
(one on each side of the mast)
, with bev
-
eled surface facing out towards section-2.
(Same as Fig
44.
Thread slide pad attaching bolts, two (2) 1/4”-20UNC x
3/8” long hex head bolts, place a flat washer under head
of each bolt, through holes on inside rail, on bottom end
of mast section-3 and into the slide pad inserts. Thread
in enough to hold pad in place.
45.
Shim per instructions in step 7, Mast Section 2 - Assem
-
bly.
46.
Slide section-4 out the bottom of section-3 approxi
-
mately one (1) foot.
47.
Locate one (1) of the chain bottom anchor plates
(one
with threaded holes horizontally aligned to center of
bracket)
. Attach using holes in bottom of mast section-4
with four (4) 1/4”-20UNC x 3/4” long bolts, place a flat
-
washer under head of each bolt.
48.
Slide section-4 out the top of section-3 approximately
one (1) foot.
49.
Insert threaded ends of chain assembly
(attached to top
of mast section-2)
, into the opening between mast sec
-
tion-3 and mast section-4. Slide the threaded ends
through the holes in bottom anchor plate attached to
bottom of mast section-4. Loosely thread two (2) 3/8”-
16UNC nuts onto stud threads on each chain until all
slack is taken out of chain. Chains will be adjusted later
in assembly.
50.
Assemble chain sheaves
(for narrow chain assembly)
to
top of mast section-4 as follows;
a. Locate the remaining sheave pin and slide the wide
tube spacer onto the pin shaft.
b. Place two (2) of the narrow chain sheave wheels
onto the sheave pin on each side of the wide spacer.
c. Slide two (2) 1" flat washers onto each end of sheave
pin to outside of sheave wheels.
d. Place two (2) sheave pin support bars, one each end
of sheave pin to outside of space tubes. Place a roll
pin in the slots at each end of the sheave pins and
align with the cutouts in the pin support bars.
Figure 5-25. Mast Section 4 - Chain Anchor Bracket
(Bottom of Mast)
1.
Chain Anchor Bracket
3.
Anchor Bolts/Washers (a)
2.
Mast Section 4
4.
Pot-Hole Actuator Bracket
NOTE:
(a) Apply Medium strength Threadlocking Compound
to threads.
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