JLG 19BD Service Manual - Manual (Page 48)

SECTION 2 - SERVICE PROCEDURES
2-26 – JLG Lift – 3121154
between both sides of mast. Insert shims until
the shims cannot be inserted halfway by hand
with the mast pulled to the opposite side.
d. When mast slide pads are shimmed properly,
there should be no side to side movement of
slide pad in rail channel. Mast sections should
be snug in channels but still be able to slide in
channel by hand.
8. Insert slide pads into the slide pad channels (top of
mast) between section-1 and -2, (one on each side
of the mast), with beveled surface facing in towards
section-2.
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.
9. 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
mast section-1 outside rail (top of mast) and into the
slide pad inserts. Thread in enough to hold pad in
place.
10. Shim per instructions in step 7, Mast Section 2 -
Assembly.
NOTE: Lift cylinder installation is to be completed next, there
are two different design lift cylinders following, check
your serial number or compare visually for correct
mounting procedure.
LIFT CYLINDER INSTALLATION - EXCEPT FOR
S/N- 0130005748
11. If not already installed, install the lift cylinder mount-
ing plates onto the bottom rails of Mast Section 1.
NOTE: If hydraulic cylinder needs to be extended, the pro-
tective caps on the extend and return ports will need
to be temporarily removed. Be careful not to nick or
scour rod surface when extending, also catch any oil
draining out of cylinder to avoid spillage onto work
area.
12. Slide mast section-2 out of mast section-1 approxi-
mately one foot.
13. Slide the lift cylinder into the closed rail side of mast
section-2 with rod end to top and port end to bottom
of mast. Cylinder should extend out of mast on both
ends of the mast with the port end resting in the cyl-
inder mount at the bottom of the mount. The manual
descent valve should be pointing down towards the
back of the mast assembly.
14. At the base of the lift cylinder, align the through hole
for the cylinder attach rod in the cylinder valve body
and the cylinder mounting plates.
15. Install a snap ring on one end of the cylinder attach
rod and slide the rod through the mounting plates
and cylinder valve body.
16. Install the snap ring to the attach rod on the other
end.
1. Slide Pads 3. Sequence Cable Bracket
2. Shim Stock 4. Slide Pad Bolts/Washers (a)
Notes: (a) Apply Loctite #242 to threads.
Figure 2-8. Mast Top End - Slide Pad Installation
(Typical)
1
4
4
2
3
Lift Cylinder Mounting Plates Installation
(ALL MACHINES EXCEPT S/N - 0130005748)
1. Cylinder Mount Plates 3. Mounting Screw Nuts
2. Plate Mounting Screws (a)
Notes: (a) Apply Loctite #242 to threads.
1
1
2
3