JLG 4017PS Service Manual - Manual (Page 65)

3-27 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
Boom
3.13.7 Fourth Boom Section Installation
1. Apply Loctite ® 242 TM to the wear pad mounting bolts.
Install the bottom, left right and top wear pads. Do
not shim or tighten the side and top wear pad bolts
at this time. Install both extend chains (6) on bottom
rear of fourth boom section. Lay extend chains the
length of fourth boom section.
2. Grease the inside third boom section on area’s
where the fourth boom section wear pads will slide.
3. Using a suitable sling, balance the fourth boom
section and carefully slide 914 mm to 1219 mm
(3 ft to 4 ft) into the front of the third boom section.
Set the fourth boom section head onto suitable
support and reset sling under the boom head of the
fourth boom section. Carefully slide the fourth boom
section into the third boom section. Leave
1829 mm to 2438 mm (6 ft to 8 ft) of the fourth boom
section out to be able to install wear pads in front of
the third boom section.
4. With the sling still under boom head install the top
wear pads. Lower the fourth boom section and install
the bottom, left and right side wear pads. Do not
shim or tighten bolts at this time.
Note: Grease wear pads, inside sheaves, bores and
pins during assembly.
5. Apply Loctite ® 242 TM to the sheave mounting bolts,
Install the sheave (7), pin, lock plate and bolts at the
bottom front of the third boom section. Torque bolts to
90 Nm (66 lb-ft). Grease the sheave using the
grease fitting in the pin. Spin the sheave by hand to
ensure the sheave spins freely on the pin and to
distribute grease evenly. Pull both extend chains from
the fourth boom section around the front and over the
sheave. Install both chain clevises, pins and clips.
6. Retract the fourth boom section the remainder of the
way into the third boom section and install the wear
pads at the rear of third and fourth boom sections.
7. Apply Loctite ® 242 TM to the wear pad mounting bolts
and install the bottom left and right side wear pads,
backing plates, shims and bolts. Shim the top wear
pads on the rear of the fourth boom section. Shim
the top left and right wear pads on the rear of the
fourth boom section. Torque bolts to 90 Nm (66 lb-ft).
Torque grease fitting bolts to 45 Nm (33 lb-ft).
3.13.8 Third and Fourth Boom Section
Installation
1. At the rear of the third boom section apply Loctite ®
242 TM to the wear pad mounting bolts and install the
bottom rear wear pads, washers and bolts. Torque to
90 Nm (66 lb-ft). Install the bottom rear left and right
side wear pads, backing plate and bolts (do not shim
or tighten bolts). Install the top rear wear pads,
backing plates and bolts (front bolts are drilled and
tapped for grease fittings. do not shim or tighten
bolts). Install both extend chains on the bottom rear
of the third boom section. Lay extend chains the
length of third boom section.
2. Grease the inside second boom section on areas
where the third boom section wear pads will slide.
3. Install retract chain, pin and clip to bottom front
inside of the second boom section.
Note: Keep the retract chain centered on bottom of the
third boom section while installing the third boom section
into the second boom section.
MZ5710
6
MZ5740
7