JLG 15/20MSP Service Manual - Manual (Page 112)

SECTION 5 - MAST COMPONENTS
5-22 – JLG Lift – 3121231
Mast Section 3 - Assembly
NOTE: When sliding mast sections together, be careful not
to scratch or score the anodized finish in the slide
pad channels.
24. Carefully slide mast section-3 into section-2 until
ends are even.
25. Insert slide pads into the top end mast rails between
section-2 and -3, (one on each side of the mast),
with beveled 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.
26. 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.
27. Shim per instructions in step 7, Mast Section 2 -
Assembly.
28. Insert slide pads into the bottom end mast rails
between section-2 and -3, (one on each side of the
mast), with beveled surface facing out towards sec-
tion-2. (Same as Figure 5-7. on page 5-19)
29. 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.
30. Shim per instructions in step 7, Mast Section 2 -
Assembly.
31. Slide section-3 out the bottom of section-2 approxi-
mately one (1) foot.
32. Locate one (1) of the chain (bottom) anchor brackets
(one with threaded holes horizontally aligned to out-
side of bracket). Attach using outer set of holes in
bottom of mast section-3 with two (2) 1/4"-20UNC x
3/4" long bolts, place a flatwasher under head of
each bolt.
33. Slide section-3 out the top of section-2 approxi-
mately one (1) foot.
34. Locate the remaining narrow chain set (#444) and
attach them to the remaining triangular shaped
anchor plate using the attach pins, flat washers and
cotter keys.
35. Install the chain/anchor plate assembly into the top
of mast section-3, using the remaining large pin and
Mast Section 3 - Chain Anchor Bracket
(Bottom of Mast)
1. Chain Anchor Bracket 3. Anchor Bolts/Washers (a)
2. Mast Section 3
Note: (a) Apply Loctite #242 to threads.
Mast Section 3 - Chain/Anchor Plate Installation
(Mast Section-3 Shown Cut-away)
1. Chain/Anchor Plate Assy. 4. Pin Keeper
2. Anchor Pin 5. Keeper Screw (a)
3. Spacer
Note: (a) Apply Loctite #242 to threads.
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