JLG 15/20MSP Service Manual - Manual (Page 105)

SECTION 5 - MAST COMPONENTS
3121231 – JLG Lift – 5-15
5.6 MAST ASSEMBLY INSTALLATION
Mast Removal
1. The following components must be removed from
the machine before removing the mast assembly:
• Rear Covers
• Drive Motor Cover
• Disconnect the Platform Control Console from the Mast
mounted junction box
• Platform Assembly
2. Disconnect the positive battery cable from the left
side battery.
3. Unplug the platform control cable connector at the
ground control module.
4. Remove the clamp attaching the platform control
cable from inside the mast mounting column.
5. Disconnect the spring and clamp attaching the AC
receptacle cable inside the mast mounting column.
6. Under the machine, disconnect and cap the hydrau-
lic extend and return lines from the hydraulic cylin-
der.
7. Using an overhead crane or suitable lifting device
capable of supporting the weight of the mast assem-
bly, attach a sling strap to the mast. (If installed, use
the optional crane lifting lug on the back of the mast.)
8. Remove the six (6) mast attach bolts with washers
and nuts securing the mast to the mounting column.
9. Lift the mast off the base frame and place on a suit-
able work surface.
Mast Installation
To install the mast assembly reverse the Mast Assembly
Removal instructions, however perform the following addi-
tional steps during re-assembly.
1. Install machine covers per instructions Section 3.
2. Once assembly is complete cycle the mast up and
down several times, then check the oil level in the
hydraulic reservoir.
Mast Assembly Installation
1. Mast Mounting Column
2. Mounting Bolt/Washer/Nut Locations (a)
Notes: (a) Apply Loctite #271 to bolt threads on final assembly.
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