Service Manual Instruction Manual

SECTION 4 - BOOM & PLATFORM
4-68 – JLG Lift – 3121171
4.24 TOWER LIFT CYLINDER
Removal
1. Place the machine on a firm, level surface with the axles
fully extended or the turntable centered between the
rear wheels.
2. Select lift up and raise the tower boom until it is in a hor-
izontal position.
NOTE: The main boom must be elevated approximately 12 inches
(30 cm) above the boom rest but no more than 15° above
the tower to prevent damage to the machine. Refer to Fig-
ure 4-47., Tower Lift Only Restrictions.
3. Position the Platform/Ground select switch to the
Ground position.
4. If the Boom Control System allows tower telescope, skip
to step 18. If not, continue with step 6.
5. Plug the analyzer into the connector inside the Ground
control box.
6. Pull out the Emergency Stop switch and start the
engine.
Figure 4-47. Tower Lift Only Restrictions