JLG 45e Service Manual - Manual (Page 52)

SECTION -
-26 – JLG Lift – 3120861
above horizontal. Shut down machine and prop
boom.
2. Tag, disconnect and cap the upper boom lift cylinder
hydraulic lines and ports.
3. Remove the hardware securing the cylinder rod
attach pin #1 to the boom. Using a suitable brass
drift, drive out the cylinder rod attach pin #1.
4. Secure the cylinder with suitable slings or supports
as required. Remove the hardware securing the bar-
rel end attach pin #2. Using a suitable brass drift,
drive out the barrel end attach pin #2.
5. Remove the cylinder from the boom and place in a
suitable work area.
Upper (Main) Boom Lift Cylinder Installation.
NOTE: Coat I.D. of bushings with specified lubricant prior to
installing pins.
1. 30/35/n35/40/n40/45 electric - Install Lift Cylinder in
place using suitable slings or supports, aligning
attach pin mounting holes on upright.
2. Using a suitable drift, drive the barrel end attach pin
#2 through the mounting holes in the lift cylinder
and upright. Secure in place with pin retaining hard-
ware.
3. Remove cylinder port plugs and hydraulic line caps
and correctly attach lines to cylinder ports.
4. With function speed switch at its slowest setting,
extend the cylinder rod until attach pin hole aligns
with those in boom. Using a suitable drift, drive the
cylinder rod attach pin #1 through the aligned
holes. Secure the pin in place with pin retaining
hardware.
5. Cycle cylinder completely to check for proper func-
tioning. Place boom in stowed position. Check
hydraulic fluid level and adjust accordingly.
Mid Boom Lift Cylinder Removal.
(See Figure 2-25.)
1. 40/n40/45 electric - Place machine on flat and level
surface. Place the Upper Boom in a horizontal posi-
tion. Place the Mid Boom in a 10 degree elevated
position. See Figure 2-11. Support Upper Boom with
a prop. Support upright with an overhead crane.
2. Using slings, restrain the lower lift cylinder.
3. Remove the hardware securing the cylinder rod
attach pin #3 to the boom. Using an appropriate
brass drift, drive out the cylinder rod attach pin #3.
4. Tag, disconnect and cap the lift cylinder hydraulic
lines and ports.
5. Remove the hardware securing the barrel end attach
pin #4 to the boom. Using an appropriate brass
drift, drive out the cylinder barrel pin #4.
6. Carefully remove cylinder from boom. Place in a
suitable work area.
Figure 2-24. Upper Boom Lift Cylinder Removal.
Figure 2-25. Mid Boom Lift Cylinder Removal.