JLG 15/20MSP Service Manual - Manual (Page 100)

SECTION 5 - MAST COMPONENTS
5-10 – JLG Lift – 3121231
4. At the base end, remove and cap the extend and
return hydraulic lines.
5. Remove the mini covers from the tops of the mast
sections.
6. Manually extend the mast assembly until the top of
mast section-2 is extended approximately one (1)
foot (31cm), to allow access to the sheave wheel-
anchor block at the top of mast section-2 and the lift
cylinder.
7. Remove the adjust and lock nuts from the chain
studs at the bottom of mast section-3.
8. Push mast sections-3, 4 and 5 back towards the
base assembly allowing the top of mast section-2 to
be completely exposed.
Hydraulic Extend and Return Lines
1. Cylinder Return Line 3. Manual Descent Valve
2. Cylinder Extend Line
Extending Mast Sections
1. Mast Section-2 2. 1 ft. (31cm) Extended
1
2
Chain Assembly - Bottom of Mast Section-3
1. Mast Section-4 4. Adjust Nut
2. Mast Section-3 5. Lock Nut (b)
3. Chain Assembly Stud (a)
Note: (a) Remove nuts and push studs through anchor plate.
Exposing Top of Mast Section-2
1. Sections-3, 4 and 5 Pushed Back
2. Top of Mast Section-2 Exposed
1
2
3
4
5
2
1