JLG 120-SXJ Service Manual - Manual (Page 54)

SECTION 4 - BOOM & PLATFORM
4-6 – JLG Lift – 3121810
Assembly
NOTE: When installing fly section wear pads, install same
number and thickness of shims as were removed
during disassembly.
1. Install upper aft fly section wear pads and shims, as
required, using bolts and lockwashers.
2. Using suitable lifting equipment, carefully slide fly
section into outer mid section.
3. Install fly section extend chain sheaves on front of
outer mid section and install sheave pins. If neces-
sary, tap pins into place using a soft headed mallet.
Secure pins using bolts, washers and lockwashers.
4. Install lubrication fittings in ends of pins and lubri-
cate sheaves with MPG.
NOTE: When installing outer mid section wear pads, install
same number and thickness of shims as were
removed during disassembly.
5. Install outer mid section top front wear pads and
shims, as required, using bolts and lockwashers.
6. Install outer mid section side front wear pads and
shims, as required, using bolts and lockwashers.
7. Install outer mid section bottom front wear pads and
shims, as required, using bolts and lockwashers.
8. Install outer mid section upper aft wear pads and
shims, as required, using bolts and lockwashers.
9. Using suitable lifting equipment, carefully slide
assembled outer mid and fly sections into inner mid
section.
NOTE: When installing inner mid section wear pads, install
same number and thickness of shims as were
removed during disassembly.
10. Install inner mid section top front wear pads and
shims, as required, using bolts and lockwashers.
11. Install inner mid section side front wear pads and
shims, as required, using bolts and lockwashers.
12. Install inner mid section bottom front wear pads and
shims, as required, using bolts, washers and lock-
washers.
13. Install inner mid section upper aft wear pads and
shims, as required, using bolts and lockwashers.
14. Install fly section retract chain adjust block on lower
front end of inner mid section and secure with bolts.
15. Place outer mid section extend chain assembly
along telescope cylinder chain rest with chain adjust
assembly hanging just below cylinder sheave.
16. Using lightweight motor oil (SAE 20W), adequately
lubricate portion of chain occupying cylinder chain
rest.
17. Using suitable lifting equipment, maneuver tele-
scope cylinder and outer mid section extend chain
assembly into position at aft end of assembled
boom sections.
18. With a slight downward angle on the cylinder, insert
sheave and chain adjust into boom sections until it
is possible to insert chain adjust into attach block at
rear of outer mid section. Temporarily install chain
adjust and locknuts.
19. Carefully feed telescope cylinder approximately half-
way into boom sections, lubricating chain with light-
weight motor oil as it passes along chain rest. Attach
extension bar to chain and continue inserting into
boom sections.
20. Install fly section retract chain sheaves, seals and
thrustwashers at aft end of outer mid section.