JLG 4017 Service Manual - Manual (Page 46)

Boom
3.22 4017
Use shims under the upper rear wear pads, under the
bottom front wear pads and under the side wear pads as
required, to maintain a minimum gap of 1.6 mm (1/16 in)
between the wear pad and boom surface.
c. Second Boom Section
Coat all wear pad bolts with Loctite 242 ® before
installation.
The wear pads on the inside front and outside rear of the
second boom section can be replaced by removing the
bolts securing them to the top, sides and bottom of the
boom.
When removing pads, move the boom sections as
needed to gain access for removal and installation of
wear pads. Mark or otherwise label each pad, spacer/
shim and hardware set for ease of installation later. Top
wear pads are secured to the boom with washers and
bolts; side wear pads are secured with washers and
bolts.
Use shims under the upper rear wear pads, under the
bottom front wear pads and under the side wear pads as
required, to maintain a minimum gap of 1.6 mm (1/16 in)
between the wear pad and the boom surface.
d. First Boom Section
Coat all wear pad bolts with Loctite 242 ® before
installation.
All first boom section wear pads are mounted on the
inside front of the first boom section. Remove the bottom
wear pads before removing the top wear pads. Lower the
gooseneck to the ground until the second boom section
raises up, providing clearance for removing the bottom
pads. Fill the grease pockets of the top rear boom wear
pads with multi-purpose grease.
Use shims under the bottom front and under the side
wear pads as required to maintain a minimum gap of
1.6 mm (1/16 in) between the wear pad and boom
surface.
MZ0850
Third Section Boom
MZ0860
Second Section Boom