JLG 15/20MSP Service Manual - Manual (Page 106)

SECTION 5 - MAST COMPONENTS
5-16 – JLG Lift – 3121231
5.7 MAST ASSEMBLY AND DISASSEMBLY
PROCEDURES
The MVL/MSP lift mast sections are constructed of
extruded aluminum, protected with an anodized surface
finish. The mast sections are interlocked into each other
when assembled, by internally mounted slide pads at the
top and bottom of each mast section. These slide pads
run up and down in slide pad channels on each side of
the mast.
The MVL/MSP model mast assembly contains a different
number of mast sections as shown following;
Assembly procedures for all mast sections is basically the
same, carefully slide the mast sections together until mast
ends are even. (When sliding the mast sections together,
be careful not to scratch the anodized surface). Assemble
the hardware to the bottom of mast section first, slide this
section out the top of previous section and assemble
hardware to the top of mast. Always install slide pad shims
with slide pads inserted into the slide pad channels, (ends
of mast sections even). Applying silicone spray onto the
slide pads and slide pad channels before assembly will
help mast sections slide easier after slide pads have been
properly shimmed.
Mast Disassembly Procedure
1. After the mast assembly has been removed from the
machine, lay the mast assembly down on a suitable
work table with the platform mounting section on
top, facing up.
2. Remove the sequencing cables and hardware from
the sides of the mast assembly. Also remove the
covers from the top of the mast assembly.
Mast Section-5 - Removal
3. Remove chain adjust nuts from threaded ends of
chain attached to the chain anchor plate (lower) on
BOTTOM end of mast section-5 (platform mounting
section). Push threaded ends of chain through
anchor plate.
4. At the TOP of mast section-5, pull chains out and
allow to hang loose. (Be certain floor surface is
clean and free of any metal chips or debris which
may stick to lubricated chains).
NOTE: When sliding mast sections apart, be careful not to
scratch or score the anodized surface in the slide
pad channels.
Table 5-1. MVL/MSP Mast Component Features
Model
No. of Mast
Sections
Extend/Retract
Device
MVL Series & MSP 5 Chain
Figure 5-5. Mast Section - Assembly Reference.
OPEN RAIL
(REFERS TO OPEN RAIL
FRONT OF MAST SECTION)
CLOSED RAIL
(REFERS TO CLOSED RAIL
BACK OF MAST SECTION)
BOTTOM
(REFERS TO BOTTOM END OF
MAST SECTION WHICH SETS IN
MACHINE’S BASE FRAME)
TOP
(REFERS TO TOP END
OF MAST SECTION
WHERE COVER AND
SHEAVE WHEELS
ARE ATTACHED)