JLG 9MP Service Manual - Manual (Page 60)

SECTION 5 - MAST COMPONENTS
5-16 – JLG Lift – 3121163
e. Begin sliding top of mast section-3 with closed
rail down engaging the slide pads into slide pad
channels at bottom of mast section-2’s open rail.
Continue to push section-3 into section-2 until
BOTTOM ends of mast sections are even.
f. Check mast section for side play. If play exists
use thicker shims dividing thickness equally
between both sides of mast.
g. When mast slide pads are shimmed properly,
there should be no side to side movement of
slide pad in rail channel. Mast sections should
be very snug in channels but still be able to slide
in channel by hand.
20. Slide mast section-3 out even with top of section-2.
21. Insert threaded ends of chain assembly (attached to
top of mast section-1) into the opening between
mast section-2 and mast section-3. Slide the
threaded ends through the holes in bottom chain
anchor plate located on bottom of mast section-3.
Loosely thread two (2) 3/8"-16UNC nuts onto stud
threads on each chain. Chains will be adjusted later
in assembly.
22. Slide mast section-3 back into mast section-2 until
bottom ends of masts are even. Check to make sure
chain set attached to top of section-1 is seating
properly in chain sheave wheels attached to top of
mast section-2. (Mast section-2 may need to be
restrained to keep it’s slide pads from pushing out
the bottom of mast sections-1).
23. At bottom of mast assembly, thread all chain adjust-
ing nuts on threaded ends until they are snug
against the bottom anchor plates and all slack is
removed from chains. Check that chains are seated
in their sheave wheels at top of mast assembly.
24. Assemble the mini cover to the top of mast section-
2.
25. Attach the sequencing cables and hardware to the
sides of the mast assembly.
26. Install the mast chain guard to the top mast section-
3 (platform mounting section).
The mast assembly is now ready to install on the
machine base frame.
Mast Section 5 - Bottom End Components
(Chain Anchor Bracket and Slide Pad Installation)
1. Chain Anchor Bracket 3. Slide Pad 5. Slide Pad Bolts/Washers (a)
2. Anchor Bracket Bolts/Washers(a) 4. Long Slide Pad
Notes: (a) Apply Loctite #242 to threads.
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