JLG 4017PS Service Manual - Manual (Page 53)

3-15 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
Boom
6. Install the tilt circuit hoses, auxiliary/electrical circuit
hoses through the channels at the rear of the third
boom section and bolt into place.
7. Connect the retract chain (2) at the rear of the third
boom section and lay the chain over the boom.
8. Lubricate wear pad paths and lay the extend/retract
cylinder hoses, tilt hoses, auxiliary/electrical hoses
behind the third boom section being careful to
protect the hoses against being damaged when
installing the third boom section into the second
boom section.
9. With the extend/retract cylinder installed in the third
boom section, the third boom section is ready to be
installed into the second boom section.
10. Place the second boom section upside down on
suitable supports.
11. Lubricate the inside second boom section on area’s
where the third boom section wear pads will slide.
12. Using a suitable sling, balance the third boom
section and carefully slide the hoses and
1 m-1,2 m (3 ft-4 ft) of the third boom section into the
front of the second boom section.
13. Set the third boom section onto a suitable support
and reset the sling under the boom head of the third
boom section. Carefully slide the third boom section
into the second boom section.
14. Leave 152 mm-203 mm (6 in-8 in) of the third boom
section out to be able to install the wear pads in the
front of the second boom section.
15. With the sling still under boom head, install the wear
pads and spacers in the front of the second boom
section.
16. Install the top wear pads and spacers on the top rear
of the third boom section.
17. Install the wear pads and spacers on the bottom and
both sides at the rear of the second boom section.
For ease of installation, DO NOT install the top wear
pads at this time.
18. Lubricate wear pads, inside sheaves, bores and pins
during assembly.
19. Push the third boom section the remainder of the
way into the second boom section.
20. Align the barrel end of the extend/retract cylinder
with the bore on the rear of the second boom section
and install the pin and retaining rings (3).
3.6.5 Second and Third Boom Section
Installation
1. Place the first boom section upside down on suitable
supports.
2. Lubricate the inside first boom section on area’s
where the second boom section wear pads will slide.
3. Using a suitable sling, balance the second and third
boom sections and carefully slide 0,9 m-1,22 m
(3 ft-4 ft) into the front of the first boom section.
4. Set the second and third boom sections onto a
suitable support and reset the sling under the boom
head of the third boom section.
MAM0890
2
MAM0730
3