JLG 9MP Service Manual - Manual (Page 54)

SECTION 5 - MAST COMPONENTS
5-10 – JLG Lift – 3121163
5.5 MAST ASSEMBLY AND DISASSEMBLY
PROCEDURES
The model 9MP 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 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 Krytox Lubricant (JLG-P/
N- 3020041) onto the slide pad channels before assembly
will help mast sections slide easier after slide pads have
been properly shimmed.
Table 5-1. 9MP Mast Component Features
Model
No. of Mast
Sections
Extend/Retract
Device
9MP 3 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)