JLG 10MSP Service Manual - Manual (Page 99)

SECTION 5 - MAST COMPONENTS
3121228 – JLG Lift – 5-17
d. Insert key into the keyway on the end of the
sheave pin.
e. Place two (2) sheave pin support bars, one each
end of sheave pin onto outside of spacer tubes.
f. Holding complete sheave wheel assembly, slide
assembly into top of mast section-3 and align
threaded holes in sheave pin support bars with
holes in mast rails.
g. Attach to top of mast section-3 using two (2) 3/
8"-16UNC x 1/2" long socket head-countersunk-
flathead cap screws, each side. Coat threads
with Loctite #171 and tighten.
9. Slide the top of mast section-3 back in even with the
top of mast section-2.
10. Insert slide pads into the top end mast rails between
section-2 and -3, (one on each side of the mast),
with beveled surface facing inward towards section-
3. (Same as Figure 5-6.)
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.
11. 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
outside rail, on top of mast section-2 and into the
slide pad inserts. Thread in enough to hold pad in
place.
12. Shim per instructions in step 7, Mast Section 2 -
Assembly. Apply Loctite #242 to attach screw
threads on final assembly.
Top of Mast Section-3 - Narrow Chain Sheave Wheel Installation
1. Narrow Spacer Tube
2. Sheave Pin
3. Sheave Wheels (Narrow)
(a)
4. Wide Spacer Tube (a)
5. Key
6. Sheave Pin Support Plates
(a)
7. Support Plate Screws (b)
Note: (a) Install one on both sides of anchor block.
(b) Apply Loctite #242 to threads on final assembly.
Top of Mast Section-3 - Top Slide Pad Installation
1. Slide Pads
2. Shim Stock 3. Slide Pad Attach Screws (a)
4. Upper Sequence Cable Bracket
Note: (a) Apply Loctite #242 to attach screws on final assembly.