SECTION 2 - SERVICE PROCEDURES
2-22
31215808
NOTE:
When sliding mast sections apart, be careful not to scratch
or score the anodized finish in the slide pad channels.
28. Carefully slide mast section-3 out BOTTOM of section-2.
Remove slide pads, shims and chain anchor plate, if nec-
essary.
Mast Section 2 Removal
(All Masts)
29. Slide mast section-2 out TOP of mast section-1 far
enough to allow access to the chain anchor block/sheave
wheel assembly.
30. Remove countersunk-flathead screws securing chain
anchor block/sheave wheel assembly attach bars on
both side rails at TOP of mast section-2.
31. Extend the chain anchor block/sheave wheel assembly
and hydraulic cylinder rod out the TOP of mast section-2
far enough to allow removal of the sheave wheel attach
bars, sheave wheels and sheave pin from the chain
assembly anchor block.
32. Remove the setscrew holding the hydraulic cylinder rod
into the chain assembly anchor block. Lay chain assem-
bly to side.
NOTE:
When sliding mast sections apart, be careful not to scratch
or score the anodized finish in the slide pad channels.
33. Carefully slide mast section-2 out the TOP of section-1,
be careful not to nick or score cylinder rod surface while
removing. Remove slide pads and shims, if necessary.
Mast Section 1 Disassembly
(All Masts)
34. Slide the TOP of the remaining mast section-1 out over
edge of work surface and remove the bolts attaching the
anchor blocks of the two (2) chain assemblies to mast
section-1. Remove chain assemblies from mast and lay
aside.
35. Remove the hydraulic lift cylinder from it’s mount
attached to mast section-1, if necessary.
36. Remove slide pads and shims from mast section-1, is nec-
essary.
Mast disassembly should now be complete.
2.10 MAST ASSEMBLY
(See Figure 2-4. or Figure 2-5.)
Mast Section 1 - Assembly
(All Masts)
1. Place mast section-1, rail (open) side up
on a clean, flat surface
(preferably a table or work bench
capable of supporting the weight of the entire mast assem-
bly)
. Slide mast out over end of work surface far enough
to allow access to the chain anchor attach holes at top of
mast.
2. Locate the two (2) single
(wide)
chain assemblies. Lay out
each chain assembly with anchor block end towards
mast, and notched end of block down,
(be certain floor
surface is clean and free of any metal chips or debris which
may stick to lubricated chains or lay chains in a clean
bucket)
.
3. Insert chain adjustment into the top of mast section-1 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. Insert threaded ends
of chain assembly, through holes in attach bracket
attached to bottom of mast section-2. Using two (2) 1/2
in. hex nuts onto stud threads on each chain. Chains will
be adjusted later in assembly.
Mast Section 2 - 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.
4. Locate mast section-2, carefully slide mast section-2
closed rail into section-1 open rail. Slide sections
together until ends are even.
5. Insert slide pads into the slide pad channels at bottom
end of mast between section-1 and -2,
(one on each side
of the mast)
, with beveled surface facing out towards sec-
tion-1.
6. 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 in mast section-2 inside rail,
into the slide pad inserts. Thread in enough to hold pad
in place.
7. Shim slide pads using the following steps:
NOTE:
Always use an even amount of shim material behind slide
pads on both sides of the mast rails. This will keep mast
sections centered in rail channels and prevent any distor-
tion of the mast section.
a. Start with a 0.036 in. thick shim and a 0.075 in. thick
shim per side at each slide pad.
b. Slide shims into place between slide pad and mast
rail. Tighten the slide pad mounting bolts, be sure
there are no air gaps between shims, shim and mast
or shim and slide pad when tightened.
c. Check mast section for side play. If play exists add
0.015 in. shims dividing the thickness equally
between both sides of mast. Insert shims until the
shims cannot be inserted halfway by hand with the
mast pulled to the opposite side.
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