JLG 9MP Service Manual - Manual (Page 56)

SECTION 5 - MAST COMPONENTS
5-12 – JLG Lift – 3121163
Mast Assembly - 9MP
(See Figure 2-2.)
MAST SECTION 1 - ASSEMBLY
1. Place mast section-1, rail (open) side up (See Figure
2-1.) on a clean, flat surface (preferably a table or
work bench capable of supporting the weight of the
entire mast assembly). Slide mast out over end of
work surface far enough to allow access to the chain
anchor attach hole near the top of the mast.
2. Locate the two (2) single (wide) chain assemblies
and attach to the large equalizer anchor plate (if not
already attached). Lay out the chain/anchor plate
assembly with the anchor plate end towards top of
the mast. (Be certain floor surface is clean and free
of any metal chips or debris which may stick to lubri-
cated chains).
3. Insert the chain/anchor plate assembly end into the
top of mast section-1 and secure using the large
anchor plate attach pin, spacers, and pin keeper.
NOTE: If equipped, assemble the floor brake alarm limit
switch into the top of mast section-1 now. Route the
wiring out the hole on the right side of the extrusion.
1. Mast Section-1 5. #444 Chain Assembly
2. Mast Section-2 6. Lift Cylinder Assembly
3. Mast Section-3 7. Chain Anchor (Lower)
4. Chain Anchor Equalizer (Upper)
Figure 5-6. Mast Chain Routing Diagram. - 9MP
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Chain/Anchor Plate Installation
(Mast Section-1 - Shown Cut-Away)
1. Anchor Plate Pin 4. Long Spacer
2. Short Spacer 5. Pin Keeper
3. Chain/Anchor Plate Assy. 6. Keeper Screw (a)
Notes: (a) Apply Loctite #242 to threads.
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