JLG 19BD Service Manual - Manual (Page 58)

SECTION 2 - SERVICE PROCEDURES
2-36 – JLG Lift – 3121154
2.10 19BD - MAST ASSEMBLY AND
DISASSEMBLY PROCEDURE
(See Figure 2-10., Figure 2-11. and Figure 2-12.)
19BD - Mast Disassembly Procedure
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-5 on TOP and facing
up.
2. Remove the sequencing retract cables from sides of
mast assembly, the chain guard, and the mini covers
from the top of each mast section.
MAST SECTION - 5 - REMOVAL
3. Remove chain adjust nuts from threaded ends of
chain attached to the chain anchor plate on BOT-
TOM end of mast section-5 (short, platform mounting
section). Push threaded ends of chain through
anchor plate
4. At TOP of mast section-5, pull chains 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.
5. Carefully slide short mast section-5 out BOTTOM of
mast section-4 rails. Disassemble slide pads, shims
and cable anchor plate from mast section-5, if nec-
essary.
MAST SECTION - 4 - REMOVAL
6. Remove chain adjust nuts from threaded ends of
chain attached to the chain anchor plate on BOT-
TOM end of mast section-4. Push threaded ends of
cable through anchor plate.
7. At TOP of mast section-4, 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 or lay chains in a clean bucket).
8. Slide mast section-4 out TOP of mast section-3 far
enough to allow access to the chain sheave wheel
assembly.
9. Remove countersunk flathead screws securing
chain sheave wheel assembly attach bars on both
side rails at TOP of mast section-4 and remove
sheave wheel assembly.
NOTE: When sliding mast sections apart, be careful not to
scratch or score the anodized finish in the slide pad
channels.
10. Carefully slide mast section-4 out BOTTOM of sec-
tion-3. Remove slide pads, shims and chain anchor
plate, if necessary.
Figure 2-10. Mast Section - Assembly/Disassembly Reference.
TOP
(REFERSTOTOPEND
OF MAST SECTION-
ENDWITHCOVER
ANDSHEAVEWHEELS
ATTACHED)
BOTTOM
(REFERSTOBOTTOM END
OF MAST SECTION-
ENDWHICHSETSAT
MACHINESBASEFRAME)
CLOSEDRAIL
(REFERSTOCLOSEDRAIL
BACKOF MAST SECTION)
OPENRAIL
(REFERSTOOPENRAIL
FRONT OF MAST SECTION)