JLG 10MSP Service Manual - Manual (Page 98)

SECTION 5 - MAST COMPONENTS
5-16 – JLG Lift – 3121228
Mast Section 3 - Assembly
1. Lay the wide chain set attached to the top of mast
section-1 into the open rail on mast section-2.
NOTE: Before sliding mast sections together, spray the slide
pad channels with Krytox lubricant spray, (JLG P/N-
3020041). Be careful not to scratch or score the
anodized finish in the slide pad channels.
2. Carefully slide mast section-3 into section-2 until
ends are even.
3. At the bottom of mast section-3, install the slide
pads between mast section-2. and 3. Shim per
instructions in step 7, Mast Section 2 - Assembly.
4. Push mast section-3 out the top of mast section-2
approximately 1 ft. (31cm).
5. Locate the lower chain anchor bracket (one with the
threaded attach holes horizontally aligned to outside
of bracket).
6. Working at the bottom end of mast section-3, insert
the threads (stud) ends of the (wide) chain set, now
laying between mast section-2 and 3, into the holes
of the lower chain anchor bracket. Loosely thread
two (2) 3/8"-16UNC nuts onto the stud threads on
each chain.
7. Slide the anchor plate into the closed rail at the bot-
tom of mast section-3 and attach the anchor plate to
the bottom of mast section-3 with four (4) 1/4"-
20UNC x 3/4" long bolts. Apply Loctite #242 to
threads on final assembly.
8. At the top of mast section-3, assemble the chain
sheaves (for narrow chain assembly) to top of mast
section-3 as shown following;
a. Slide the narrow spacer tube onto one of the
remaining sheave pin.
b. Place the narrow chain sheave wheel assem-
blies, one on each side of the narrow spacer
onto the sheave pin.
c. Place one wide spacer tube on the outside of
each sheave wheel on the sheave pin.
Top of Mast Section-2 - Slide Pad Installation
1. Wide Chain Set Attached to Mast Sec-
tion-1.
2. Mast Section-2
Bottom of Mast Section-3 - Slide Pad Installation
1. Slide Pads
2. Shim Stock 3. Shim Pad Screws
Bottom of Mast Section-3 - Chain Anchor Plate Installation
1. Lower Chain Anchor Bracket
2. Anchor Bracket Screws 3. Wide Chain Set Studs
4. Chain Adjust and Jam
Nuts