JLG 19AMI (3120875) Service Manual - Manual (Page 38)

SECTION 2 - SERVICE PROCEDURES
2-22 – JLG Lift – 3120875
2.10 MAST ASSEMBLY AND DISASSEMBLY
PROCEDURES
The AM Series personnel lift mast sections are contructed
of extruded aluminum, protected with an anodized surface
finish. The mast sections rails are interlocked into each
other when assembled and are guided by slide pads
mounted at the top and bottom of the rails on both sides
of the mast section.
The current AMI model mast assembly has been designed
with four (4) mast sections;
When assembing mast sections carefully slide the mast
sections together from bottom until mast ends are even,
(when sliding mast sections together be careful not to
scratch the anodized surface in the slide pad channels).
Assemble the hardware to the bottom of mast section first,
then slide this section out the top of previous section and
assemble hardware to the top of mast, (See Figure 2-3.).
Always install slide pad shims with slide pads inserted into
the slide pad channels, (ends of mast sections even).
Mast Disassembly Procedure
(See Figure 2-3.)
1. After the platform and other hardware have been
removed from the mast, and mast has been
removed from machine, lay mast assembly down
with the shortest mast section-4 on top and facing
up.
2. Remove sequencing retract cables from sides of
mast assembly and the mini covers from the top of
each mast section.
Platform Section – Removal
3. Remove cable adjust nuts from threaded ends of
cable attached to the cable anchor plate on BOT-
TOM end of mast section-4 (short, platform mounting
section). Push threaded ends of cable through
anchor plate
4. At TOP of mast section-4, pull cables out and allow
to hang loose.
NOTE: When sliding mast sections apart, be careful not to
scratch or score the anodized finish in the slide pad
channels.
Table 2-4. AM Series Mast Component Features
Model
No. of Mast
Sections
Extend Device
15AMI 4
Chain & Cable, All
Cable or All Chain
Figure 2-3. Mast Section - Assembly/Disassembly Reference.
TOP
(REFERS TO TOP END
OF MAST SECTION -
END WITH COVER
AND SHEAVE WHEELS
ATTACHED)
BOTTOM
(REFERS TO BOTTOM END
OF MAST SECTION -
END WHICH SETS AT
MACHINES BASE FRAME)
CLOSED RAIL
(REFERS TO CLOSED RAIL
BACK OF MAST SECTION)
OPEN RAIL
(REFERS TO OPEN RAIL
FRONT OF MAST SECTION)