SECTION 2 - SERVICE PROCEDURES
2-28
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Mast Section 5 - Assembly
(All Masts)
NOTE:
When sliding mast sections together, be careful not to
scratch or score the anodized finish in the slide pad chan-
nels.
45. Locate mast section-5, carefully slide section-5 closed rail
into section-4 open rail. Slide sections together until
ends are even.
46. Locate one (1) of the attach bracket (one with threaded
holes horizontally aligned to outside of bracket). Attach
to the bottom of section-5 using outer set of holes in bot-
tom of mast section-5 with four (4) 1/4
in. x 3/4 in. long
bolts, place a flatwasher under head of each bolt.
47. Slide mast section-5 out the top of mast section-4 so the
bracket on bottom of mast section-5 is easily accessible
near top end of mast section-4. Rest the top end of mast
section-5 on a support while performing next step.
48. Insert threaded ends of cable assembly
(attached to top
of mast section-3)
through the bracket located on bottom
of extended mast section-5. Loosely thread two (2) 3/8 in.
nuts onto stud threads on each chain. Chains will be
adjusted later in assembly.
NOTE:
When sliding mast sections together, be careful not to
scratch or score the anodized finish in the slide pad chan-
nels.
49. Slide mast section-5 back into section-4 except for a foot
or two of length.
50. Insert chain adjustment into the top of mast section-5 by
using spacer, chain equalizer and Keeper. Secure one end
of the chain assembly with chain adjustment by using
two (2) pin, cotter pin and washer.
51. While mast section-5 is still extended from section-4,
assemble cable sheaves to top of mast section-5 as fol-
lows;
a. Locate remaining sheave pin. Slide two (2) cable
sheave wheels onto sheave pin and center.
b. Place two (2) short spacer tubes on sheave pin, one
on each end of sheave pin to outside of sheave
wheels.
c. Place two (2) sheave pin attach bars, one on each
end of sheave pin to outside of short spacer tubes.
d. Holding complete cable sheave wheel assembly,
slide assembly into top of mast section-5 and align
threaded holes in sheave pin attach bars with holes
in mast rails.
e. Attach to top of mast section-5 using two (2) 3/8 in.
x 1/2 in. long socket head-countersunk-flathead cap
screws, each side. Apply Medium Strength Thread-
locking Compound.
NOTE:
When sliding mast sections together, be careful not to
scratch or score the anodized finish in the slide pad chan-
nels.
52. Carefully slide mast section-5 back into section-4 until
ends are even. Check to make sure cable set from top of
section-3 is seating properly in cable sheave wheels
attached to top of mast section-4.
(Mast sections-2, -3 and
-4 may need to be restrained to keep their slide pads from
pushing out the bottom of mast sections-1, -2 and -3)
.
53. Insert slide pads into the top end mast rails between sec-
tion-4 and -5,
(one on each side of the mast)
, with beveled
surface facing inward towards section-5.
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.
54. Thread slide pad attaching bolts, (two (2) 1/4 in.
x 7/8 in.
long hex head bolts, place a flat washer under head of
each bolt), through holes in outside rail, on top of mast
section-4 and into the slide pad inserts. Thread in
enough to hold pad in place.
55. Shim per instructions in step 7, Mast Section 2 - Assem-
bly.
56. Insert slide pads into the bottom end mast rails between
section-4 and -5, (one on each side of the mast), with
beveled surface facing out towards section-4.
57. Thread slide pad attaching bolts, (two (2) 1/4 in.
x 3/4 in.
long hex head bolts, place a flat washer under head of
each bolt), through holes on inside rail, on bottom end of
mast section-4 and into the slide pad inserts. Thread in
enough to hold pad in place.
58. Shim per instructions in step 7, Mast Section 2 - Assem-
bly.
Mast Section 6 - Assembly
(25 ft. Masts)
59. Locate mast section-6, carefully slide section-6 closed rail
into section-5 open rail. Slide sections together until
ends are even.
60. Locate one (1) of the attach bracket (one with threaded
holes horizontally aligned to outside of bracket). Attach
to the bottom of section-6 using outer set of holes in bot-
tom of mast section-5 with three (3) 1/4 in.
x 3/4 in. long
bolts, place a flatwasher under head of each bolt.
61. Slide mast section-6 out the top of mast section-5 so the
bracket on bottom of mast section-6 is easily accessible
near top end of mast section-5. Rest the top end of mast
section-6 on a support while performing next step.
62. Insert threaded ends of cable assembly
(attached to top
of mast section-4)
through the bracket located on bottom
of extended mast section-6. Loosely thread two (2) 3/8 in.
nuts onto stud threads on each chain. Chains will be
adjusted later in assembly.
63. Slide mast section-6 back into section-5 except for a foot
or two of length.
64. While mast section-6 is still extended from section-5,
assemble cable sheaves to top of mast section-6 as fol-
lows;
a. Slide two (2) cable sheave wheels onto sheave pin,
one each end of sheave pin to outside of tube
spacer.
b. Place two (2) sheave pin attach bars, one on each
end of sheave pin to outside of short spacer tubes.
c. Holding complete cable sheave wheel assembly,
slide assembly into top of mast section-6 and align
threaded holes in sheave pin attach bars with holes
in mast rails.
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