JLG 19BD Service Manual - Manual (Page 43)

SECTION 2 - SERVICE PROCEDURES
3121154 – JLG Lift – 2-21
NOTE: When sliding mast sections apart, be careful not to
scratch or score the anodized surface in the slide
pad channels.
5. Carefully slide mast section-4 out the BOTTOM of
mast section-3 rails. Disassemble slide pads, shims
and chain anchor plate from mast section-4, if nec-
essary.
MAST SECTION-3 - REMOVAL
6. Remove chain adjust nuts from threaded ends of
chain attached to the chain anchor plate on BOT-
TOM end of mast section-3. Push threaded ends of
chain through the anchor plate.
7. At TOP of mast section-3, 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).
8. Slide mast section-3 out TOP of mast section-2 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-3 and remove the
sheave wheel assembly.
10. While mast section-3 is still extended from section-2
remove the pin attaching the chain anchor plate to
the TOP of mast section-3. Remove chains.
NOTE: When sliding mast sections apart, be careful not to
scratch or score the anodized finish in the slide pad
channels.
11. Carefully slide mast section-3 out BOTTOM of sec-
tion-2. Remove slide pads, and shims, if necessary.
Figure 2-4. 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)