JLG 15VPSP Service Manual - Manual (Page 47)

SECTION 2 - SERVICE PROCEDURES
3120797 – JLG Lift – 2-29
flathead cap screws, each side. Coat threads
with Loctite #171 and tighten.
32. Slide mast section-3 back into section-2 until ends
are even. Check to make sure chain assembly (wide
chains) are seating properly in chain anchor block
chain sheave wheels attached to mast section-2.
MAST SECTION 4 - ASSEMBLY
NOTE: When sliding mast sections together, be careful not
to scratch or score the anodized finish in the slide
pad channels.
33. Carefully slide mast section-4 into section-3 until
ends are even.
34. Insert slide pads into the top end mast rails between
section-2 and -3, (one on each side of the mast),
with beveled surface facing inward towards section-
3.
NOTE: Before fastening and shimming the slide pad on the
top left side of the mast, install a sequence cable
bracket against the mast under the flatwasher.
35. Thread slide pad attaching bolts, two (2) 1/4"-
20UNC x 3/8" long hex head bolts, place a flat
washer under head of each bolt, through holes in
outside rail, on top of mast section-2 and into the
slide pad inserts. Thread in enough to hold pad in
place.
36. Shim per instructions in step 7, Mast Section 2 -
Assembly.
37. Insert slide pads into the bottom end mast rails
between section-2 and -3, (one on each side of the
mast), with beveled surface facing out towards sec-
tion-2.
38. Thread slide pad attaching bolts, two (2) 1/4"-
20UNC x 3/8" long hex head bolts, place a flat
washer under head of each bolt, through holes on
inside rail, on bottom end of mast section-3 and into
the slide pad inserts. Thread in enough to hold pad
in place.
39. Shim per instructions in step 7, Mast Section 2 -
Assembly.
40. Slide section-4 out the top of section-3 approxi-
mately two (2) feet.
41. Locate one (1) of the chain bottom anchor plates
(one with threaded holes horizontally aligned to cen-
ter of bracket). Attach using holes in bottom of mast
section-4 with three (3) 1/4"-20UNC x 3/4" long bolts,
place a flatwasher under head of each bolt.
42. Insert threaded ends of chain assembly (attached to
top of mast section-2), into the opening between
mast section-3 and mast section-4. Slide the
threaded ends through the holes in bottom anchor
plate attached to bottom of mast section-4. Loosely
thread two (2) 3/8"-16UNC nuts onto stud threads on
each chain. Chains will be adjusted later in assem-
bly.
43. Assemble chain sheaves (for narrow chain assem-
bly) to top of mast section-4 as follows;
a. Locate the remaining sheave pin and slide the
wide tube spacer onto the pin shaft.
b. Place two (2) of the narrow chain sheave wheels
onto the sheave pin on each side of the wide
spacer.
c. Slide two (2) 1" flatwashers onto each end of
sheave pin to outside of sheave wheels.
d. Place two (2) sheave pin support bars, one each
end of sheave pin to outside of space tubes.
Place a roll pin in the slots at each end of the
sheave pins and align with the cutouts in the pin
support bars.
e. Holding complete sheave wheel assembly, slide
assembly into top of mast section-4 and align
threaded holes in sheave pin support bars with
holes in mast rails.
f. Attach to top of mast section-4 using two (2) 3/
8"-16UNC x 1/2" long socket head-countersunk-
flathead cap screws, each side. Coat threads
with Loctite #171 and tighten.
NOTE: When sliding mast sections together, be careful not
to scratch or score the anodized finish in the slide
pad channels.
44. Carefully slide mast section-4 into section-3 until
ends are even. Check to make sure chain assembly
(narrow chains) are seating properly in chain anchor
block chain sheave wheels attached to mast sec-
tion-3.
MAST SECTION 5 - ASSEMBLY
1. Locate the remaing mast section-5 (platform mount-
ing - mast section). Lay mast section on flat stable
surface.
2. Attach the remaining chain bottom anchor plate
(one with threaded holes aligned at the outside of
bracket). Attach through set of holes in bottom of
mast section-5 with four (4) 1/4"-20UNC x 3/4" long
bolts, place a flatwasher under head of each bolt.
NOTE: The platform mounting section slide pads, are
assembled differently than the slide pads for the
other mast sections. Mast section-5 slide pads may
need to be assembled/disassembled several times in
order to determine the correct shim stock required
for proper fit.
3. Complete the following steps to determine shim
stock thickness required for section-5;