Mast Assembly And Disassembly Procedure - JLG AM-19 Operators And Safety Manual Service & Maintenance Manual Illustrated Parts Manual

JLG
Lift SECTION 8 - SERVICE PROCEDURES
JLG
Lift
unable to obtain the same type of oil supplied
with the machine, consult local supplier for
assistance in selecting the proper equivalent.
Avoid mixing petroleum and synthetic base
oils. JLG Industries recommends changing the
hydraulic oil annually.
2.
Use every precaution to keep the hydraulic oil
clean. If the oil must be poured from the original
container into another, be sure to clean all
possible contaminants from the service con-
tainer.
3.
While the unit is shut down, a good preventive
maintenance measure is to make a thorough
inspection of all hydraulic components, lines,
fittings, etc., as well as a functional check of
each system, before placing the machine back
in service.
• lubrication Specifications
Specified lubricants, as recommended by the
component manufacturers, are always the best
choice, however, multi-purpose greases usu-
ally have the qualities which meet a variety of
single purpose grease requirements. Should
any question arise regarding the use of
greases in maintenance stock, consult your
local supplier for evaluation. Refer to Table 7-2
for an explanation of the lubricant key designa-
tions appearing in the Lubrication Chart.
8-4. MAST ASSEMBLY AND DISASSEMBLY
PROCEDURES
• Mast Disassembly Procedure
(See Figure 8-1.)
Note
Reference to mast sections -4/-5/-6 made following
is dependent on which model machine you are serv-
icing. The 24, 30 and 36 ft. models use six (6) mast
sections whereas the 19ft. mast assembly contains
only 5 mast sections.
1. After the platform has been removed from the
mast and mast has been removed from ma-
chine, lay mast assembly down with the short-
est mast section-5/-6 on top and facing up.
2. Remove sequencing cables from sides of mast
assembly. Also, remove the latch bar assem-
bly from BOTTOM of mast section-5/-6.
3. Remove cable adjust nuts from threaded ends
of cable attached to the cable anchor plate on
BOTTOM end of mast section-5/-6
(short, plat-
form mounting section). Push threaded ends of
cable through anchor plate.
4.
At TOP of mast section-5/-6, pull cables out
and allow to hang loose.
Note
When sliding mast sections apart, be careful not to
scratch or score the lubricating graphokote coating
in the slide pad channels.
5. Carefully slide short mast section-5/-6 out
BOTTOM of mast section-4/-5 rails. Disassem-
ble slide pads, shims and cable anchor plate
from mast section-5/-6, if necessary.
Note
Steps 6 through 10 apply to removal of mast section-
s
used on 24, 30 & 36 ft. models which have six (6)
mast sections. If servicing a 19 ft. mast, go to step
11.
6. Remove cable adjust nuts from threaded ends
of cable attached to the cable anchor plate on
bottom end of mast section-5. Push threaded
ends of cable through anchor plate.
7.
At top of mast section-5, pull cables out and
allow to hang loose.
a.
Slide mast section-5 out TOP of mast section-4
far enough to allow access to the cable sheave
wheel assembly.
-JLG
Lift- 8-5