JLG 45e Service Manual - Manual (Page 53)

SECTION -
3120861 – JLG Lift – -27
Mid Boom Lift Cylinder Installation.
NOTE: Coat I.D. of bushings with specified lubricant prior to
installing pins.
1. 40/n40/45 electric - With the booms positioned and
supported as in Figure 2-11, place cylinder in posi-
tion and secure in place using slings.
2. Install the cylinder barrel pin #4, being sure to align
the hole in the cylinder barrel pin with the retaining
pin screw hole. When holes align, install hardware.
3. Correctly install hydraulic lines to cylinder as previ-
ously tagged. Extend cylinder rod slowly until attach
pin hole aligns with those in boom.
4. Using a suitable brass drift, drive the cylinder rod
attach pin #3 through the aligned holes. Secure the
pin in place using retaining hardware.
5. Remove boom prop and overhead crane. Take the
lift cylinder through one complete cycle to assure
correct functioning. Place boom in stowed position.
Check hydraulic fluid and adjust accordingly.
Lower Boom Lift Cylinder Removal.
1. 30/35/n35 electric - Place machine on flat and level
surface. Place the Upper Boom in a horizontal posi-
tion. Place the Lower Boom in a horizontal position.
See Figure 2-11. Support Upper Boom with a prop.
Support upright with an overhead crane.
2. 40/n40/45 electric - Place machine on flat and level
surface. Place the Upper Boom in a horizontal posi-
tion. Place the Mid and Lower Booms 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 #5 to the boom. Using an appropriate
brass drift, drive out the cylinder rod attach pin #5.
4. Tag, disconnect and cap the lift cylinder hydraulic
lines and ports.
5. Remove the hardware securing the barrel end attach
pin #6 to the boom. Using an appropriate brass
drift, drive out the cylinder barrel pin #6.
6. Carefully remove cylinder from boom. Place in a
suitable work area.
Lower 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 - With the booms posi-
tioned and supported as in Figure 2-11, place cylin-
der in position and secure in place using slings.
2. Install the cylinder barrel pin #6, being sure to align
the hole in the cylinder barrel pin with the retaining
pin screw hole. When holes align, install hardware.
3. Correctly install hydraulic lines to cylinder as previ-
ously tagged. Extend cylinder rod slowly until attach
pin hole aligns with those in boom.
4. Using a suitable brass drift, drive the cylinder rod
attach pin #5 through the aligned holes. Secure the
pin in place using retaining hardware.
5. Remove boom prop and overhead crane. Take the
lift cylinder through one complete cycle to assure
correct functioning. Place boom in stowed position.
Check hydraulic fluid and adjust accordingly.
Upper Boom Telescope Cylinder Removal.
(See Figure 2-27.)
1. 35/n35/40/n40/45 electric - Place machine on flat
and level surface, with Upper Boom in the horizontal
position. Extend Upper Boom until fly attach pin #1
is accessible on fly.
Figure 2-26. Lower Boom Lift Cylinder Removal.