JLG DVSP Series Service Manual - Manual (Page 101)

SECTION 5 - MAST COMPONENTS
3121136 – JLG Lift – 5-13
5.6 MAST ASSEMBLY AND DISASSEMBLY
PROCEDURES
The DVL/DVSP lift mast sections are constructed of extruded
aluminum, protected with an anodized surface finish. The
mast sections are interlocked into each other when assem-
bled, 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 DVL/DVSP 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 sec-
tion 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 sec-
tions 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)
Table 5-1. DVL/DVSP Mast Component Features
Model
No. of Mast
Sections
Extend/Retract
Device
DVL Series
& DVSP
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)