JLG 41AM (3120872) Service Manual - Manual (Page 43)

SECTION 2 - SERVICE PROCEDURES
3120872 – JLG Lift – 2-21
Platform Section Removal (All Masts)
1. Remove chain adjust nuts from threaded ends of
chain attached to the chain anchor plate on BOT-
TOM end of mast section-5/-6/-7 (short, platform
mounting section). Push threaded ends of chain
through anchor plate
2. At TOP of mast section-5/-6/-7, 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.
3. Carefully slide short mast section-5/-6/-7 out BOT-
TOM of mast section-4/-5/-6 rails. Disassemble slide
pads, shims and chain anchor plate from mast sec-
tion-5/-6/-7, if necessary.
Mast Section 6 Removal (7 Section Mast)
NOTE: Steps 6 through 10 apply to removal of mast section-
6 used on 30 & 41 ft. models which have seven (7)
mast sections. If disassembling a six (6) section 25
or 36 ft. mast, go to step 11, if disassembling a five
(5) section 20 ft. mast continue to step 17.
4. Remove chain adjust nuts from threaded ends of
chain attached to the chain anchor plate on bottom
end of mast section-6. Push threaded ends of chain
through anchor plate.
5. At top of mast section-6, pull chains out and allow to
hang loose.
6. Slide mast section-6 out TOP of mast section-5 far
enough to allow access to the chain sheave wheel
assembly.
7. Remove countersunk-flathead screws securing
chain sheave wheel assembly attach bars on both
side rails at top of mast section-6 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.
8. Carefully slide mast section-6 out BOTTOM of sec-
tion-5. Remove slide pads, shims and chain anchor
plate, if necessary.
Mast Section 5 Removal (6 & 7 Section Mast)
NOTE: Steps 11 through 15 apply to removal of mast sec-
tion-5 used on 25, 30, 36 & 41 ft. models. If servicing
a 20 ft. mast, go to step 17.
9. Remove chain adjust nuts from threaded ends of
chain attached to the chain anchor plate on bottom
end of mast section-6. Push threaded ends of chain
through anchor plate.
10. At top of mast section-5, pull chains out and allow to
hang loose.
11. Slide mast section-5 out TOP of mast section-4 far
enough to allow access to the chain sheave wheel
assembly.
12. Remove countersunk-flathead screws securing
chain sheave wheel assembly attach bars on both
side rails at top of mast section-6 and remove
sheave wheel assembly.
NOTE: Step 15 applies to removal of the chain assemblies
used on mast section-5 of 30 & 41 ft. models. If ser-
vicing a 25 or 36 ft. mast, go to step 16.
13. While mast section-5 is still extended from section-4
remove the bolts attaching the two (2) chain assem-
bly anchor eyelets to the TOP of mast section-5.
Remove chains.
NOTE: When sliding mast sections apart, be careful not to
scratch or score the anodized finish in the slide pad
channels.
14. Carefully slide mast section-5 out BOTTOM of sec-
tion-4. Remove slide pads, shims and chain anchor
plate, if necessary.
Mast Section 4 Removal (All Masts)
15. 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
chain through anchor plate.
16. 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).
17. Slide mast section-4 out TOP of mast section-3 far
enough to allow access to the chain sheave wheel
assembly.
18. 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.
19. While mast section-4 is still extended from section-3
remove the bolts attaching the two (2) chain assem-
bly anchor eyelets to the TOP of mast section-4.
Remove chains.
NOTE: When sliding mast sections apart, be careful not to
scratch or score the anodized finish in the slide pad
channels.