JLG 120HX Parts Manual User Manual
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3120820
3-7
S
E
C
T
I
O
N
3
B
O
O
M
SECTION 3 BOOM
121
4761400
Lockwasher 1/4"
18
122
4300032
Stud (Welded on Part)
8
123
3840858
Rod, Tube Retainer
1
124
4562516
Tube
1
125
4340453
Support, Bracket
1
126
0181175
Angle (Prior to August 1992)
1
127
4761500
Lockwasher 5/16"
3
128
0641510
Bolt 5/16"-18NC x 1 1/4"
3
129
3311501
Nut 5/16"-18NC
3
130
4751500
Flatwasher 5/16"
6
131
4340520
Support (Prior to August 1992)
2
132
4740349
Washer, Special
1
133
3421632
Pin (Prior to March 1993)
1
134
3536001
Plate, Ramp (Left Side)
1
135
3421571
Pin, Attach
2
136
1380124
Clip, Retainer (Prior to May 1995)
34
137
4920385
Wire, Safety (Prior to May 1995)
17.6’/5.4m
138
3840975
Rod, Hose Retainer (Right Side) (Prior to March
1993)
1
139
3430408
Pin, Clevis 1/4" x 1"
1
140
3450203
Pin, Cotter 1/16" x 3/4"
1
141
3421628
Pin, Attach
2
142
1260254
Chain, Safety (Upper)
1
143
1360234
Clevis, Chain
1
144
4160098
Washer, Belleville
104
Note: Top of base section requires qty 75 on both
standard machines & machines with broken
chain limit switch (See Figure 3-6). Standard
machines require qty 27 at the bottom of inner
mid section. Machines with broken chain limit
switch require the standard qty 27 plus an
additional qty 48 per Figure 3-6 for a total qty of
75 at bottom of inner mid section.
145
4712000
Flatwasher 5/8” (Narrow)
2
146
0361727
Bar
1
147
1260261
Chain, Safety (Lower)
1
148
1360223
Clevis, Chain
1
149
1060016
Cable, Electrical - 16/3 Options:
A/R
Prior to S/N 47227
50 ft./15.3m
S/N 47227 to Present
30 ft./9.1m
150 to 152
Not Used
153
3340494
Pad, Wear (Inner Mid Front Bottom)
2
154
4070600
Shim 1/8"/3.2mm
A/R
155
4070601
Shim 1/16"/1.6mm
A/R
156
1670321
Cover (Prior to S/N 40599)
1
157
Not Used
158
0741608
Screw, Countersunk 3/8"-16NC x 1"
1
159
3520029
Plug, Hole (Prior to S/N 47227)
4
160
4740304
Washer, Spacer
2
161
0641407
Bolt 1/4" - 20 NC x 7/8"
2
FIGURE 3-1. BOOM ASSEMBLY COMPONENTS INSTALLATION (CONTINUED)
FIG & ITEM #
PART NUMBER
DESCRIPTION
QTY.
REV.